{"id":1281,"date":"2026-10-23T07:00:46","date_gmt":"2026-10-23T07:00:46","guid":{"rendered":"https:\/\/www.r3tr0.net\/?page_id=1281"},"modified":"2026-10-23T07:00:47","modified_gmt":"2026-10-23T07:00:47","slug":"wmdoc_usage-guide","status":"publish","type":"page","link":"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_usage-guide\/","title":{"rendered":"WonderMCA: Usage guide"},"content":{"rendered":"\n<div class=\"wp-block-group wmdoc-hero has-text-color has-background has-link-color wp-elements-1 is-layout-constrained wp-container-core-group-is-layout-89221c49 wp-block-group-is-layout-constrained\" style=\"border-radius:10px;color:#edf5ff;background-color:#001141;margin-bottom:32px;padding-top:28px;padding-right:32px;padding-bottom:28px;padding-left:32px\">\n<p class=\"has-text-color wp-block-paragraph\" style=\"color:#78a9ff;margin-bottom:8px;font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase\">WonderMCA \u00b7 User documentation <\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"margin-top:0;font-size:19px;line-height:1.55\">How to use the WonderMCA every day: what the PS\/2 shows at power-on, the boot prompts, the setup menu page by page with its exact entries and screens, how to choose and swap images, create a new hard disk image, control the card from DOS with wmctrl, and save your settings.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"margin-top:12px;font-size:14px\"><a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/\">\u2190 WonderMCA documentation home<\/a> \u00b7 Page 5 of 18<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group wmdoc-toc has-border-color has-background is-layout-constrained wp-container-core-group-is-layout-67fe145d wp-block-group-is-layout-constrained\" style=\"border-color:#dcdcde;border-width:1px;border-radius:8px;background-color:#f6f7f7;margin-bottom:32px;padding-top:16px;padding-right:24px;padding-bottom:16px;padding-left:24px\">\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>On this page \u2014 8 sections<\/summary>\n<ul class=\"wp-block-list\">\n<li><a href=\"#1-power-on\">1. Power on<\/a><\/li>\n\n\n\n<li><a href=\"#2-the-boot-prompts\">2. The boot prompts<\/a><\/li>\n\n\n\n<li><a href=\"#3-the-setup-menu\">3. The setup menu<\/a><\/li>\n\n\n\n<li><a href=\"#4-mounting-and-swapping-images\">4. Mounting and swapping images<\/a><\/li>\n\n\n\n<li><a href=\"#5-booting-from-a-cd\">5. Booting from a CD<\/a><\/li>\n\n\n\n<li><a href=\"#6-creating-a-new-hard-disk-image\">6. Creating a new hard disk image<\/a><\/li>\n\n\n\n<li><a href=\"#7-the-dos-control-program\">7. The DOS control program<\/a><\/li>\n\n\n\n<li><a href=\"#8-saving-your-settings\">8. Saving your settings<\/a><\/li>\n<\/ul>\n<\/details>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">This page follows what you do, in the order you do it. The screenpad is on <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_screenpad\/\">the screenpad reference<\/a>. Every setting is explained on <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_settings\/\">the configuration reference<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Before you start.<\/strong> The card is installed and configured with the Reference Diskette (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_hardware-installation\/\">hardware and installation<\/a>), the firmware is current (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_firmware-cpld-update\/\">firmware and CPLD update<\/a>) and the microSD card holds your images (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_sd-card\/\">microSD card preparation<\/a>).<\/p>\n\n\n\n<h2 id=\"1-power-on\" class=\"wp-block-heading\">1. Power on<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Switch the PS\/2 on. The PS\/2 counts its memory and scans its adapters. With a screenpad, the display shows its logo, then the code of the POST step in large digits, with its meaning under it.<\/li>\n\n\n\n<li>When the PS\/2 reaches the adapter ROM of the card, the card prints its banner on the screen and waits:<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_press_s.png\" alt=\"The boot banner waiting at &quot;Press S for Setup, Other to continue 5&quot;\" class=\"wp-image-1081\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_press_s.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_press_s-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_press_s-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The boot banner waiting at &#8220;Press S for Setup, Other to continue 5&#8221;<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The lines of the banner, from the top:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Banner<\/th><th>Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>WonderMCA BIOS (Date 2026-10-21 Rev 08ED) &#8211; F8 to skip<\/strong><\/td><td>The date and the revision of the option ROM. Press <strong>F8<\/strong> in the first five seconds to skip the card completely<\/td><\/tr><tr><td><strong>&#8211; Init: &#8230;<\/strong><\/td><td>One dot per step of the start-up of the card<\/td><\/tr><tr><td><strong>ROM @D000 &#8211; Port : 2A0 &#8211; IRQ : 5 &#8211; Boot Count : 1<\/strong><\/td><td>The segment of the option ROM, the command port, the interrupt the card uses to talk to the option ROM, and how many times the card has booted the PS\/2 since it was powered<\/td><\/tr><tr><td><strong>XMS : 4096kB (planar 1920kB)<\/strong><\/td><td>The extended memory of the card and the memory of the system board. <strong>XMS : None<\/strong> when it is off, <strong>XMS : Fail<\/strong> when the PSRAM failed its test<\/td><\/tr><tr><td><strong>MicroSD : Ok<\/strong><\/td><td>The microSD card was read. <strong>Fail<\/strong> when it was not<\/td><\/tr><tr><td><strong>USB : Ok<\/strong><\/td><td>The USB host started. <strong>Disabled<\/strong> when it is off<\/td><\/tr><tr><td><strong>Config : Ok<\/strong><\/td><td>The settings were read<\/td><\/tr><tr><td><strong>Network : Ethernet  Mac: &#8230;<\/strong><\/td><td><strong>None<\/strong>, <strong>WiFi<\/strong>, <strong>Ethernet<\/strong> or <strong>USB Eth<\/strong>, with the MAC address when the adapter is up<\/td><\/tr><tr><td><strong>USB : 2 devices<\/strong>, then one line per device<\/td><td>What is plugged into the USB-A port, such as <strong>1: USB keyboard<\/strong> and <strong>2: USB mouse<\/strong><\/td><\/tr><tr><td><strong>&gt; Press S for Setup, Other to continue 5<\/strong><\/td><td>The countdown, 5 seconds (1 second when <strong>Fast Boot<\/strong> is on)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A minimal configuration prints fewer lines:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_minimal.png\" alt=\"The banner of a card with no extended memory, USB off and no network: &quot;XMS : None - MicroSD : Ok - USB : Disabled&quot;, &quot;Network : None&quot;\" class=\"wp-image-1079\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_minimal.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_minimal-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_minimal-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner of a card with no extended memory, USB off and no network: &#8220;XMS : None &#8211; MicroSD : Ok &#8211; USB : Disabled&#8221;, &#8220;Network : None&#8221;<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">With a WiFi network, the <strong>Network<\/strong> line shows <strong>WiFi<\/strong> and the MAC address of the card&#8217;s radio:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_wifi.png\" alt=\"The banner with &quot;Network : WiFi  Mac: D8:3A:DD:4F:9A:21&quot;\" class=\"wp-image-1082\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_wifi.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_wifi-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_wifi-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner with &#8220;Network : WiFi  Mac: D8:3A:DD:4F:9A:21&#8221;<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">On a Model 50Z with 1 MB on the system board, the XMS line reads <strong>(planar 1024kB)<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_8550z.png\" alt=\"The banner on a Model 50Z: &quot;XMS : 4096kB (planar 1024kB)&quot;\" class=\"wp-image-1076\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_8550z.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_8550z-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_8550z-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner on a Model 50Z: &#8220;XMS : 4096kB (planar 1024kB)&#8221;<\/figcaption><\/figure>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>Press <strong>S<\/strong> to open the setup menu (<a href=\"#3-the-setup-menu\">section 3<\/a>). Press <strong>A<\/strong> to boot from the floppy first. Any other key, or no key, continues.<\/li>\n\n\n\n<li>The card prints <strong>Emulated Memory &#8211; None<\/strong> and the list of what is mounted:<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_complete.png\" alt=\"The banner once the start-up ended: &quot;Emulated Memory - None&quot;, then FDD0 : DOS622 [1440KB], HDD0 : DISK1 [512MB] - C:1040 H:16 S:63, CD : WIN95 [612MB]\" class=\"wp-image-1077\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_complete.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_complete-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_banner_complete-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner once the start-up ended: &#8220;Emulated Memory &#8211; None&#8221;, then FDD0 : DOS622 [1440KB], HDD0 : DISK1 [512MB] &#8211; C:1040 H:16 S:63, CD : WIN95 [612MB]<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Line<\/th><th>Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>FDD0 : DOS622 [1440KB]<\/strong><\/td><td>The image in floppy A: (FDD1 is B:) and its size<\/td><\/tr><tr><td><strong>HDD0 : DISK1 [ 512MB] &#8211; C:1040 H:16 S:63<\/strong><\/td><td>The image of hard disk 0 (HDD1 to HDD3 follow), its size and its geometry: cylinders, heads, sectors<\/td><\/tr><tr><td><strong>CD : WIN95 [ 612MB]<\/strong><\/td><td>The CD image<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">When a configured image cannot be mounted, its line shows the reason in brackets instead of the size: <strong>No FLOPPY folder<\/strong>, <strong>No HDD folder<\/strong>, <strong>Image not found<\/strong> or <strong>Bad image<\/strong>. The red LED of the screenpad blinks.<\/p>\n\n\n\n<h3 id=\"two-special-starts\" class=\"wp-block-heading\">Two special starts<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>F8 to skip.<\/strong> Press <strong>F8<\/strong> during the first five seconds of the banner. The screen says <strong>&gt; F8 detected: PMBIOS skipped<\/strong> and the PS\/2 boots without the card&#8217;s drives, its memory and its devices. Use it when a setting of the card stops the PS\/2 from booting.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_f8_skip.png\" alt=\"The banner after F8: &quot;&gt; F8 detected: PMBIOS skipped&quot;\" class=\"wp-image-1087\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_f8_skip.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_f8_skip-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_f8_skip-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner after F8: &#8220;&gt; F8 detected: PMBIOS skipped&#8221;<\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>USB DEBUG Mode.<\/strong> The option ROM can print <strong>USB DEBUG Mode: Connect a terminal to the USB Serial Port.<\/strong> and wait for a terminal before it goes on. That screen belongs to the PicoMEM card the firmware comes from: the WonderMCA firmware never asks for it. If you see it, the card runs a firmware that is not a WonderMCA build.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_usb_debug_wait.png\" alt=\"The banner stopped at &quot;USB DEBUG Mode: Connect a terminal to the USB Serial Port.&quot;\" class=\"wp-image-1088\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_usb_debug_wait.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_usb_debug_wait-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_boot_usb_debug_wait-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The banner stopped at &#8220;USB DEBUG Mode: Connect a terminal to the USB Serial Port.&#8221;<\/figcaption><\/figure>\n\n\n\n<h2 id=\"2-the-boot-prompts\" class=\"wp-block-heading\">2. The boot prompts<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">If <strong>Boot Code<\/strong> is on (<strong>Disk<\/strong> page of the setup menu), the card boots the PS\/2 itself:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_menu.png\" alt=\"The boot prompt: &quot;&gt; Boot: Press A to Boot from Floppy, C for CD-ROM, B for Basic\/ROM 3&quot;\" class=\"wp-image-1093\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_menu.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_menu-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_menu-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The boot prompt: &#8220;&gt; Boot: Press A to Boot from Floppy, C for CD-ROM, B for Basic\/ROM 3&#8221;<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The countdown is 3 seconds (1 second when <strong>Fast Boot<\/strong> is on).<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Key<\/th><th>What happens<\/th><\/tr><\/thead><tbody><tr><td><strong>A<\/strong> or <strong>Q<\/strong><\/td><td>Boots from the floppy first, then from the hard disks<\/td><\/tr><tr><td><strong>C<\/strong><\/td><td>Boots from the CD-ROM image (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_cdrom\/\">CD-ROM<\/a>)<\/td><\/tr><tr><td><strong>B<\/strong><\/td><td>Goes to the Basic or ROM of the PS\/2 (INT 18h)<\/td><\/tr><tr><td><strong>R<\/strong><\/td><td>Restarts the PS\/2<\/td><\/tr><tr><td>No key<\/td><td>Boots from the hard disks first (drive 0, then drive 1), then from the floppies (A:, then B:)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The screen then shows which drive boots:<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1092\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_hdd.png\" alt=\"After the countdown: &quot;HDD0: Boot...&quot;\" class=\"wp-image-1092\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_hdd.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_hdd-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_hdd-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">After the countdown: &#8220;HDD0: Boot&#8230;&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1091\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_floppy.png\" alt=\"After A: &quot;FDD0: Boot...&quot;\" class=\"wp-image-1091\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_floppy.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_floppy-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_floppy-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">After A: &#8220;FDD0: Boot&#8230;&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1089\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_cd.png\" alt=\"After C with a bootable CD image: &quot;CD: Boot...&quot;\" class=\"wp-image-1089\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_cd.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_cd-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_cd-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">After C with a bootable CD image: &#8220;CD: Boot&#8230;&#8221;<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Messages you can meet:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Message<\/th><th>Meaning<\/th><\/tr><\/thead><tbody><tr><td><strong>: Incorrect MBR<\/strong><\/td><td>A hard disk has no boot signature. The card goes on to the next drive<\/td><\/tr><tr><td><strong>CD: not bootable (no El Torito catalog \/ no disc)<\/strong><\/td><td>You pressed <strong>C<\/strong> but the disc has no boot catalog, or no disc is mounted. The normal boot order goes on<\/td><\/tr><tr><td><strong>&gt; No Boot Disk found &#8211; Insert a Floppy and Press any Key.<\/strong><\/td><td>No drive could boot<\/td><\/tr><tr><td><strong>Boot failed : Select another image or disable the WonderMCA Boot Code.<\/strong><\/td><td>The boot failed. The card prints its banner again, with <strong>Boot Count : 2<\/strong>, and the setup prompt<\/td><\/tr><tr><td><strong>&gt; Boot: Start Legacy Boot Strap<\/strong><\/td><td><strong>Boot Code<\/strong> is off: the PS\/2 boots as if the card had no boot code<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1094\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_cd_not_bootable.png\" alt=\"C pressed with no bootable disc: &quot;CD: not bootable (no El Torito catalog \/ no disc)&quot;, then &quot;HDD0: Boot...&quot;\" class=\"wp-image-1094\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_cd_not_bootable.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_cd_not_bootable-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_cd_not_bootable-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">C pressed with no bootable disc: &#8220;CD: not bootable (no El Torito catalog \/ no disc)&#8221;, then &#8220;HDD0: Boot&#8230;&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1096\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_no_boot_disk.png\" alt=\"No image to boot: &quot;&gt; No Boot Disk found - Insert a Floppy and Press any Key.&quot;\" class=\"wp-image-1096\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_no_boot_disk.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_no_boot_disk-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_no_boot_disk-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">No image to boot: &#8220;&gt; No Boot Disk found &#8211; Insert a Floppy and Press any Key.&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1090\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_failed.png\" alt=\"After a failed boot: &quot;Boot failed : Select another image or disable the WonderMCA Boot Code.&quot;, the banner again with Boot Count : 2, then &quot;FDD0: Boot...&quot;\" class=\"wp-image-1090\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_failed.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_failed-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_boot_failed-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">After a failed boot: &#8220;Boot failed : Select another image or disable the WonderMCA Boot Code.&#8221;, the banner again with Boot Count : 2, then &#8220;FDD0: Boot&#8230;&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1095\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_legacy.png\" alt=\"Boot Code off: &quot;&gt; Boot: Start Legacy Boot Strap&quot;\" class=\"wp-image-1095\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_legacy.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_legacy-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_int19_legacy-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Boot Code off: &#8220;&gt; Boot: Start Legacy Boot Strap&#8221;<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 id=\"3-the-setup-menu\" class=\"wp-block-heading\">3. The setup menu<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Press <strong>S<\/strong> at the banner. The title bar reads <strong>-= WonderMCA BIOS =-<\/strong>. The menu has seven pages:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Main | Disk | Audio | Network | USB | POS Register | Tools<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The bottom of the screen shows the keys:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Key<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><strong>Left<\/strong>, <strong>Right<\/strong><\/td><td>Change page. <strong>Left<\/strong> on <strong>Main<\/strong> goes to <strong>Tools<\/strong>, <strong>Right<\/strong> on <strong>Tools<\/strong> goes to <strong>Main<\/strong><\/td><\/tr><tr><td><strong>Up<\/strong>, <strong>Down<\/strong><\/td><td>Move between the items of the page. The arrow <code class=\"\" data-line=\"\">&gt;<\/code> marks the item. <strong>Up<\/strong> on the first item goes to the last, <strong>Down<\/strong> on the last goes to the first<\/td><\/tr><tr><td><strong>PgUp<\/strong>, <strong>PgDn<\/strong><\/td><td>First and last item of the page<\/td><\/tr><tr><td><strong>Enter<\/strong>, <strong>+<\/strong>, <strong>&#8211;<\/strong><\/td><td>Change the item: toggle On and Off, or open a list<\/td><\/tr><tr><td><strong>Esc<\/strong><\/td><td>Leave the menu<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">When you leave the menu with <strong>Esc<\/strong>, the card saves your changes to the microSD card and the boot goes on. USB, network and audio settings apply when the card finishes its start-up.<\/p>\n\n\n\n<div class=\"wp-block-group wmdoc-callout wmdoc-note has-background is-layout-constrained wp-container-core-group-is-layout-1828d0e2 wp-block-group-is-layout-constrained\" style=\"border-radius:6px;border-left-color:#f0b429;border-left-style:solid;border-left-width:4px;background-color:#fff8e1;margin-top:24px;margin-bottom:24px;padding-top:12px;padding-right:20px;padding-bottom:12px;padding-left:20px\">\n<p class=\"wp-block-paragraph\"><strong>Note.<\/strong> The setup menu works with a USB keyboard when <strong>USB Keyboard<\/strong> is on.<\/p>\n<\/div>\n\n\n\n<h3 id=\"31-main\" class=\"wp-block-heading\">3.1 Main<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main.png\" alt=\"The Main page: BIOS Rev 08ED, MCA Bus 16Bits, &quot;Total Memory: 2MB - Floppy Drives: 1 - Hard Drives:1&quot;, Board IRQ 5, Fast Boot Off, Use RTC Off, RTC Date\/Time\" class=\"wp-image-1119\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Main page: BIOS Rev 08ED, MCA Bus 16Bits, &#8220;Total Memory: 2MB &#8211; Floppy Drives: 1 &#8211; Hard Drives:1&#8221;, Board IRQ 5, Fast Boot Off, Use RTC Off, RTC Date\/Time<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>What it shows or does<\/th><\/tr><\/thead><tbody><tr><td><strong>BIOS Rev<\/strong><\/td><td>The revision of the option ROM<\/td><\/tr><tr><td><strong>MCA Bus<\/strong><\/td><td><strong>16Bits<\/strong> or <strong>8Bits<\/strong>: the data bus width of the firmware, make sure CPLD is aligned with the MCA Bus<\/td><\/tr><tr><td><strong>Total Memory<\/strong><\/td><td>One line: the total memory of the PS\/2 in MB (extended memory of the card included), the number of floppy drives and the number of hard disks<\/td><\/tr><tr><td><strong>Board IRQ<\/strong><\/td><td>The interrupt the card uses to talk to the option ROM<\/td><\/tr><tr><td><strong>Fast Boot<\/strong><\/td><td><strong>On<\/strong> or <strong>Off<\/strong>. On shortens the waiting time at the two prompts to 1 second<\/td><\/tr><tr><td><strong>Use RTC<\/strong><\/td><td><strong>On<\/strong> or <strong>Off<\/strong>. On: the clock of the card sets the DOS clock at boot<\/td><\/tr><tr><td><strong>RTC Date\/Time<\/strong><\/td><td>The clock of the card, as <code class=\"\" data-line=\"\">yyyy-mm-dd hh:mm:ss<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main_rtc.png\" alt=\"The Main page with Fast Boot On and the cursor on Use RTC, set to On\" class=\"wp-image-1120\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main_rtc.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main_rtc-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_main_rtc-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Main page with Fast Boot On and the cursor on Use RTC, set to On<\/figcaption><\/figure>\n\n\n\n<h3 id=\"32-disk\" class=\"wp-block-heading\">3.2 Disk<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk.png\" alt=\"The Disk page: Floppy Drive A: DOS622 1440kB, Floppy Drive B: -=None=-, HD Drive 0: DISK1 512MB, HD Drive 1 to 3: -=None=-, CD-ROM: WIN95 612MB, Boot Code: On, New Disk Image: Select\" class=\"wp-image-1103\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Disk page: Floppy Drive A: DOS622 1440kB, Floppy Drive B: -=None=-, HD Drive 0: DISK1 512MB, HD Drive 1 to 3: -=None=-, CD-ROM: WIN95 612MB, Boot Code: On, New Disk Image: Select<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><strong>Floppy Drive A:<\/strong>, <strong>Floppy Drive B:<\/strong><\/td><td>Choose a floppy image<\/td><\/tr><tr><td><strong>HD Drive 0:<\/strong> to <strong>HD Drive 3:<\/strong><\/td><td>Choose a hard disk image<\/td><\/tr><tr><td><strong>CD-ROM:<\/strong><\/td><td>Choose a CD image<\/td><\/tr><tr><td><strong>Boot Code:<\/strong><\/td><td><strong>On<\/strong>: the card runs the boot prompts. <strong>Off<\/strong>: the PS\/2 boots by itself. The page says <strong>&#8211; Set Off for XTIDE\/Disk BIOS<\/strong><\/td><\/tr><tr><td><strong>New Disk Image:<\/strong><\/td><td><strong>Select<\/strong> opens the dialog that creates a new hard disk image<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">At the bottom the page reminds you: <strong>Store the images under FLOPPY, HDD\\ and CDROM\\ (.iso) Folders<\/strong> and <strong>Images files name &lt;13 character and extention .img<\/strong>. If the card cannot be read, the page shows <strong>Warning: SD not present or error<\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-3 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1114\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_full.png\" alt=\"The Disk page with every drive in use: two floppies, three hard disks and a CD, cursor on Boot Code\" class=\"wp-image-1114\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_full.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_full-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_full-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Disk page with every drive in use: two floppies, three hard disks and a CD, cursor on Boot Code<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1104\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_boot_code_off.png\" alt=\"The Disk page with Boot Code set to Off\" class=\"wp-image-1104\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_boot_code_off.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_boot_code_off-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_boot_code_off-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Disk page with Boot Code set to Off<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Choosing an image.<\/strong> <strong>Enter<\/strong> on a drive opens a list:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The first line, on the first page, is <strong>-=None=-<\/strong>: it empties the drive.<\/li>\n\n\n\n<li>At the top of the list, <strong>[[SD]]<\/strong> and <strong>[[USB]]<\/strong> choose the volume. Inside a volume, folders show in square brackets, <code class=\"\" data-line=\"\">[OS2]<\/code>. <strong>Enter<\/strong> on a folder opens it. <code class=\"\" data-line=\"\">[..]<\/code> goes up.<\/li>\n\n\n\n<li>A floppy shows its size in KB, a hard disk or a CD its size in MB. A name that is too long shows <strong>Error<\/strong> as its size and cannot be selected.<\/li>\n\n\n\n<li>A page holds 16 entries. The page number shows at the bottom right, such as <code class=\"\" data-line=\"\">1\/2<\/code>.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-4 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1107\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list.png\" alt=\"The floppy list inside [SD]: -=None=-, [..], the folder [OS2], then eleven images sorted by name with their size, page 1\/1\" class=\"wp-image-1107\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The floppy list inside [SD]: -=None=-, [..], the folder [OS2], then eleven images sorted by name with their size, page 1\/1<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1108\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_cursor.png\" alt=\"The same list with the cursor moved down to DOS622\" class=\"wp-image-1108\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_cursor.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_cursor-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_cursor-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The same list with the cursor moved down to DOS622<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Key<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><strong>Up<\/strong>, <strong>Down<\/strong><\/td><td>Move. <strong>Down<\/strong> at the end of a page goes to the next page. <strong>Up<\/strong> at the top goes to the previous page, on its last entry. <strong>Up<\/strong> on <strong>-=None=-<\/strong> goes to the last entry of the last page. <strong>Down<\/strong> on the last entry of the last page goes back to <strong>-=None=-<\/strong><\/td><\/tr><tr><td><strong>PgUp<\/strong>, <strong>PgDn<\/strong><\/td><td>Previous and next page<\/td><\/tr><tr><td><strong>Enter<\/strong>, <strong>Space<\/strong><\/td><td>Select<\/td><\/tr><tr><td><strong>Esc<\/strong><\/td><td>Cancel<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-5 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1109\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page1.png\" alt=\"A floppy list of two pages, page 1\/2, with DISK01 to DISK13 in number order\" class=\"wp-image-1109\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page1.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page1-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page1-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">A floppy list of two pages, page 1\/2, with DISK01 to DISK13 in number order<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1110\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page2.png\" alt=\"Page 2\/2 of the same list\" class=\"wp-image-1110\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page2.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page2-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_page2-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Page 2\/2 of the same list<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1111\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_wrapped.png\" alt=\"Up pressed on the first entry: the cursor went to the last entry of page 2\/2\" class=\"wp-image-1111\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_wrapped.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_wrapped-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_fdd_list_wrapped-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">Up pressed on the first entry: the cursor went to the last entry of page 2\/2<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1115\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_hdd_list.png\" alt=\"The hard disk list: -=None=-, [..], then the images with their size in MB\" class=\"wp-image-1115\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_hdd_list.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_hdd_list-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_hdd_list-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The hard disk list: -=None=-, [..], then the images with their size in MB<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1105\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_cd_list.png\" alt=\"The CD-ROM list: -=None=-, then the .iso images of the CDROM folder with their size in MB\" class=\"wp-image-1105\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_cd_list.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_cd_list-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_cd_list-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The CD-ROM list: -=None=-, then the .iso images of the CDROM folder with their size in MB<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The floppy images and the CD image change at once. A hard disk image is mounted at the next start of the PS\/2.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Creating a new hard disk image.<\/strong> See <a href=\"#6-creating-a-new-hard-disk-image\">section 6<\/a>.<\/p>\n\n\n\n<h3 id=\"33-audio\" class=\"wp-block-heading\">3.3 Audio<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio.png\" alt=\"The Audio page with everything Off: Output, Adlib with &quot;&gt; Port 388h&quot;, Sound Blaster, Gravis Ultra S., CMS, Tandy, Mindscape with &quot;&gt; May conflict with XTIDE and NE2000&quot;\" class=\"wp-image-1097\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Audio page with everything Off: Output, Adlib with &#8220;&gt; Port 388h&#8221;, Sound Blaster, Gravis Ultra S., CMS, Tandy, Mindscape with &#8220;&gt; May conflict with XTIDE and NE2000&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>Values<\/th><th>Notes<\/th><\/tr><\/thead><tbody><tr><td><strong>Output:<\/strong><\/td><td>On, Off<\/td><td>The whole audio output of the card<\/td><\/tr><tr><td><strong>Adlib:<\/strong><\/td><td>On, Off<\/td><td><strong>&gt; Port 388h<\/strong><\/td><\/tr><tr><td><strong>Sound Blaster:<\/strong><\/td><td>On, Off<\/td><td>When On, the row shows the port, the interrupt and the DMA channel read from the configuration of the PS\/2: <strong>&gt; Port 220  IRQ 7  DMA 1<\/strong><\/td><\/tr><tr><td><strong>Gravis Ultra S.<\/strong><\/td><td>On, Off<\/td><td>Cannot run with the Sound Blaster. When On, the row shows the same resources<\/td><\/tr><tr><td><strong>CMS:<\/strong><\/td><td>Off or a port<\/td><td>No effect on the WonderMCA<\/td><\/tr><tr><td><strong>Tandy:<\/strong><\/td><td>Off or a port<\/td><td>No effect on the WonderMCA<\/td><\/tr><tr><td><strong>Mindscape:<\/strong><\/td><td>Off or a port<\/td><td>No effect on the WonderMCA. <strong>&gt; May conflict with XTIDE and NE2000<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio_on.png\" alt=\"The Audio page with Output, Adlib and Sound Blaster On: the Sound Blaster row shows &quot;&gt; Port 220  IRQ 7  DMA 1&quot;\" class=\"wp-image-1101\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio_on.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio_on-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_audio_on-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Audio page with Output, Adlib and Sound Blaster On: the Sound Blaster row shows &#8220;&gt; Port 220  IRQ 7  DMA 1&#8221;<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The page says <strong>For other options see documentation<\/strong>. See <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_sound-game-port\/\">Sound and game port<\/a>.<\/p>\n\n\n\n<h3 id=\"34-network\" class=\"wp-block-heading\">3.4 Network<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_network_ethernet.png\" alt=\"The Network page with Ethernet: IRQ 3, Port 300, &quot;Status: Ethernet link up 100M&quot;, the MAC address, and the [Refresh] button\" class=\"wp-image-1121\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_network_ethernet.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_network_ethernet-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_network_ethernet-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Network page with Ethernet: IRQ 3, Port 300, &#8220;Status: Ethernet link up 100M&#8221;, the MAC address, and the [Refresh] button<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>Values<\/th><\/tr><\/thead><tbody><tr><td><strong>Network:<\/strong><\/td><td><strong>None<\/strong>, <strong>Ethernet<\/strong>, <strong>WiFi<\/strong>, <strong>USB Eth<\/strong><\/td><\/tr><tr><td><strong>IRQ:<\/strong><\/td><td>3, 5, 6 or 7. The page says <strong>&#8211; NE2000 IRQ: 3\/5\/6\/7<\/strong><\/td><\/tr><tr><td><strong>Port:<\/strong><\/td><td>300h. The page says <strong>&#8211; NE2000 port range is 32 bytes<\/strong><\/td><\/tr><tr><td><strong>Status:<\/strong><\/td><td>The state of the connection<\/td><\/tr><tr><td><strong>MAC:<\/strong><\/td><td>The MAC address<\/td><\/tr><tr><td><strong>SSID :<\/strong> and <strong>Signal :<\/strong><\/td><td>The WiFi network name and its strength, when WiFi is on<\/td><\/tr><tr><td><strong>[Refresh]<\/strong><\/td><td>Reads the state again<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Going from WiFi to Ethernet, or back, in one power cycle is refused with <strong>Power cycle needed<\/strong>. See <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_network\/\">Network<\/a>, which shows the page for each network type.<\/p>\n\n\n\n<h3 id=\"35-usb\" class=\"wp-block-heading\">3.5 USB<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_usb_on.png\" alt=\"The USB page with USB Host, USB Joystick, USB Keyboard and USB Mouse On, cursor on USB Mouse; the page says &quot;- PC Joystick is on Port 201h&quot;\" class=\"wp-image-1135\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_usb_on.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_usb_on-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_usb_on-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The USB page with USB Host, USB Joystick, USB Keyboard and USB Mouse On, cursor on USB Mouse; the page says &#8220;- PC Joystick is on Port 201h&#8221;<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>Values<\/th><\/tr><\/thead><tbody><tr><td><strong>USB Host:<\/strong><\/td><td>On, Off. The page says <strong>&#8211; PC Joystick is on Port 201h<\/strong><\/td><\/tr><tr><td><strong>USB Joystick:<\/strong><\/td><td>On, Off<\/td><\/tr><tr><td><strong>USB Keyboard:<\/strong><\/td><td>On, Off<\/td><\/tr><tr><td><strong>USB Mouse:<\/strong><\/td><td>On, Off<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">See <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_usb\/\">USB devices<\/a>.<\/p>\n\n\n\n<h3 id=\"36-pos-register\" class=\"wp-block-heading\">3.6 POS Register<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The page <strong>POS Registers<\/strong> shows the <strong>Register dump<\/strong> of the card: the slot, the adapter ID <code class=\"\" data-line=\"\">0xDEAD<\/code>, the eight POS bytes, and the decoded settings <strong>Joystick<\/strong>, <strong>DMA Prio<\/strong>, <strong>IRQ<\/strong> and <strong>I\/O Base<\/strong>. <strong>[Refresh]<\/strong> reads it again. Use it to check that the Reference Diskette settings reached the card (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_hardware-installation\/\">hardware and installation<\/a>).<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_pos.png\" alt=\"The POS Register page: Slot 4, Adapter ID 0xDEAD, POS[0..7], Joystick Disabled, DMA Prio Level 1, IRQ 7, I\/O Base 0x220\" class=\"wp-image-1129\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_pos.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_pos-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_pos-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The POS Register page: Slot 4, Adapter ID 0xDEAD, POS[0..7], Joystick Disabled, DMA Prio Level 1, IRQ 7, I\/O Base 0x220<\/figcaption><\/figure>\n\n\n\n<h3 id=\"37-tools\" class=\"wp-block-heading\">3.7 Tools<\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools.png\" alt=\"The Tools page: PicoMEM Infos and ROM\/RAM Dump\" class=\"wp-image-1131\" style=\"border-radius:6px;width:560px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The Tools page: PicoMEM Infos and ROM\/RAM Dump<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Entry<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><strong>PicoMEM Infos<\/strong><\/td><td>Shows the board identity (<strong>PicoMEM Board ID: 20<\/strong>), the processor clock (<strong>PCPU Clock (RP2350): 280MHz<\/strong>), the PSRAM (<strong>QSPI PSRAM: 8MB, 93MHz<\/strong>), the interrupt, and the <strong>Detected ROM List<\/strong>: every option ROM the PS\/2 found, with its segment, its size and its checksum<\/td><\/tr><tr><td><strong>ROM\/RAM Dump<\/strong><\/td><td>Copies each option ROM to a file <code class=\"\" data-line=\"\">ROM_&lt;address&gt;.BIN<\/code> and the first megabyte of memory to <code class=\"\" data-line=\"\">RAM_DUMP.BIN<\/code>, at the root of the microSD card. The page prints one line per ROM, then <strong>&gt; Full RAM Dump to RAM_DUMP.BIN (1MB) Done<\/strong> and <strong>&gt; Completed<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-6 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1133\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_infos.png\" alt=\"PicoMEM Infos: board ID 20, clock 280MHz, PSRAM 8MB, IRQ 5, Detected ROM List with the card's ROM at D000, 16KB\" class=\"wp-image-1133\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_infos.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_infos-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_infos-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">PicoMEM Infos: board ID 20, clock 280MHz, PSRAM 8MB, IRQ 5, Detected ROM List with the card&#8217;s ROM at D000, 16KB<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1132\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_dump.png\" alt=\"ROM\/RAM Dump finished: &quot;DUMP ROM at D000, Size: 16KB Done&quot;, &quot;Full RAM Dump to RAM_DUMP.BIN (1MB) Done&quot;, &quot;Completed&quot;\" class=\"wp-image-1132\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_dump.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_dump-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_tools_dump-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">ROM\/RAM Dump finished: &#8220;DUMP ROM at D000, Size: 16KB Done&#8221;, &#8220;Full RAM Dump to RAM_DUMP.BIN (1MB) Done&#8221;, &#8220;Completed&#8221;<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<h2 id=\"4-mounting-and-swapping-images\" class=\"wp-block-heading\">4. Mounting and swapping images<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>What<\/th><th>Where<\/th><th>When it takes effect<\/th><\/tr><\/thead><tbody><tr><td>Floppy A: or B:<\/td><td>Setup menu, screenpad, <code class=\"\" data-line=\"\">wmctrl<\/code><\/td><td>At once. DOS sees the new disk<\/td><\/tr><tr><td>CD-ROM<\/td><td>Setup menu, screenpad, <code class=\"\" data-line=\"\">wmctrl<\/code><\/td><td>At once<\/td><\/tr><tr><td>Hard disk 0 to 3<\/td><td>Setup menu, <code class=\"\" data-line=\"\">wmctrl<\/code><\/td><td>At the next start<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">To change a floppy while DOS runs, use the screenpad: <strong>Disk &gt; Mount floppy<\/strong>, then <strong>A:<\/strong> or <strong>B:<\/strong>, then the image (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_screenpad\/\">screenpad reference<\/a>). Or run <code class=\"\" data-line=\"\">wmctrl disk fdd a &lt;image&gt;<\/code> in DOS (<a href=\"#7-the-dos-control-program\">section 7<\/a>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">DOS refreshes its view of the diskette when it is idle. If <code class=\"\" data-line=\"\">DIR A:<\/code> still shows the old disk, run <code class=\"\" data-line=\"\">FDSWAP<\/code> from the tools floppy, then <code class=\"\" data-line=\"\">DIR A:<\/code>.<\/p>\n\n\n\n<h2 id=\"5-booting-from-a-cd\" class=\"wp-block-heading\">5. Booting from a CD<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Press <strong>C<\/strong> at the boot prompt. See <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_cdrom\/\">CD-ROM<\/a>.<\/p>\n\n\n\n<h2 id=\"6-creating-a-new-hard-disk-image\" class=\"wp-block-heading\">6. Creating a new hard disk image<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Open the <strong>Disk<\/strong> page and select <strong>New Disk Image: Select<\/strong>, then press <strong>Enter<\/strong>.<\/li>\n\n\n\n<li>The dialog asks <strong>New Disk Size (MB):<\/strong>. Type the size and press <strong>Enter<\/strong>. The size is brought to between 10 and 4096 MB.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-2 wp-block-gallery-7 is-layout-flex wp-block-gallery-is-layout-flex\" style=\"margin-top:24px;margin-bottom:24px\">\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1116\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image.png\" alt=\"The dialog &quot;New Disk Size (MB):&quot; waiting for a value\" class=\"wp-image-1116\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The dialog &#8220;New Disk Size (MB):&#8221; waiting for a value<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"720\" height=\"400\" data-id=\"1117\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image_typed.png\" alt=\"The same dialog with 256 typed\" class=\"wp-image-1117\" style=\"border-radius:6px\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image_typed.png 720w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image_typed-300x167.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/wm_bios_setup_disk_new_image_typed-600x333.png 600w\" sizes=\"auto, (max-width: 720px) 100vw, 720px\" \/><figcaption class=\"wp-element-caption\">The same dialog with 256 typed<\/figcaption><\/figure>\n<\/figure>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>The dialog asks <strong>Disk Name:<\/strong>. Type a name of 13 characters at most and press <strong>Enter<\/strong>. An empty name cancels.<\/li>\n\n\n\n<li>The dialog shows <strong>Creating Image : n MB<\/strong>, then <strong>Done<\/strong>, or <strong>Error:<\/strong> with the reason. Press any key.<\/li>\n\n\n\n<li>The image is <code class=\"\" data-line=\"\">HDD\/&lt;name&gt;.img<\/code> on the microSD card. Select it as a hard disk (<a href=\"#32-disk\">section 3.2<\/a>).<\/li>\n\n\n\n<li>Restart the PS\/2, boot from a DOS floppy, then run <code class=\"\" data-line=\"\">FDISK<\/code> and <code class=\"\" data-line=\"\">FORMAT<\/code> on the new disk.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The reasons of an error: <strong>Image already exist<\/strong>, <strong>HDD directory missing<\/strong>, <strong>uSD Full<\/strong>, <strong>Write to file failed<\/strong>, <strong>Disk Operation failed<\/strong>.<\/p>\n\n\n\n<h2 id=\"8-saving-your-settings\" class=\"wp-block-heading\">8. Saving your settings<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The setup menu saves when you leave it.<\/li>\n\n\n\n<li>A floppy or CD mounted on the screenpad is saved at once.<\/li>\n\n\n\n<li>Settings you change on the screenpad pages <strong>Sound<\/strong>, <strong>Network<\/strong> and <strong>Disk config<\/strong> apply to the running card when you press <strong>RET<\/strong>. To keep a setting for the next start, also set it in the setup menu.<\/li>\n\n\n\n<li><code class=\"\" data-line=\"\">wmctrl<\/code> saves when you leave its menu with <strong>Save<\/strong> or press <strong>F10<\/strong>, and after every command.<\/li>\n\n\n\n<li><code class=\"\" data-line=\"\">config.txt<\/code> keys win over the saved settings for the keys they set (<a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_settings\/\">configuration reference<\/a>).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity is-style-wide\" style=\"margin-top:48px;margin-bottom:24px\"\/>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-0ee9f569 wp-block-group-is-layout-constrained\" style=\"border-radius:8px;background-color:#f6f7f7;padding-top:14px;padding-right:18px;padding-bottom:14px;padding-left:18px\">\n<p class=\"has-text-align-left has-text-color wp-block-paragraph\" style=\"color:#0f62fe;margin-bottom:2px;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase\">\u2190 Previous<\/p>\n\n\n\n<p class=\"has-text-align-left wp-block-paragraph\" style=\"margin-top:0;font-size:17px;font-weight:600\"><a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_firmware-cpld-update\/\">Firmware and CPLD update<\/a><\/p>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<div class=\"wp-block-group has-background is-layout-constrained wp-container-core-group-is-layout-0ee9f569 wp-block-group-is-layout-constrained\" style=\"border-radius:8px;background-color:#f6f7f7;padding-top:14px;padding-right:18px;padding-bottom:14px;padding-left:18px\">\n<p class=\"has-text-align-right has-text-color wp-block-paragraph\" style=\"color:#0f62fe;margin-bottom:2px;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase\">Next \u2192<\/p>\n\n\n\n<p class=\"has-text-align-right wp-block-paragraph\" style=\"margin-top:0;font-size:17px;font-weight:600\"><a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_screenpad\/\">Screenpad reference<\/a><\/p>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-align-center has-text-color wp-block-paragraph\" style=\"color:#787c82;margin-top:20px;font-size:13px\">WonderMCA user documentation <a href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/\">Documentation home<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>How to use the WonderMCA every day: what the PS\/2 shows at power-on, the boot prompts, the setup menu page by page with its exact entries and screens, how to choose and swap images, create a new hard disk image, control the card from DOS with wmctrl, and save your settings.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1277,"menu_order":5,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"tags":[49,33,32,34,50],"class_list":["post-1281","page","type-page","status-publish","hentry","tag-documentation","tag-ibm","tag-mca","tag-ps-2","tag-wondermca"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>WonderMCA: Usage guide - R3TR0<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.r3tr0.net\/index.php\/wondermca-documentation\/wmdoc_usage-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"WonderMCA: Usage guide - R3TR0\" \/>\n<meta property=\"og:description\" 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