{"id":793,"date":"2026-10-17T14:02:06","date_gmt":"2026-10-17T14:02:06","guid":{"rendered":"https:\/\/www.r3tr0.net\/?page_id=793"},"modified":"2026-10-17T14:36:53","modified_gmt":"2026-10-17T14:36:53","slug":"smtdoc_hardware-installation","status":"publish","type":"page","link":"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_hardware-installation\/","title":{"rendered":"SmartDisk II: Hardware and installation"},"content":{"rendered":"\n<div class=\"wp-block-group smtdoc-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:#e6f4ea;background-color:#0d1f15;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:#5dff9a;margin-bottom:8px;font-size:13px;font-weight:600;letter-spacing:2px;text-transform:uppercase\">SmartDisk II \u00b7 User documentation \u00b7 Latest firmware<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"margin-top:0;font-size:19px;line-height:1.55\">The SmartDisk II board and its XL variant, the connectors and power jumpers, how to connect it to an Apple II, IIc, IIgs or Macintosh, which emulation to pick for which connection, and what to check before the first power-up.<\/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\/smartdisk-ii-documentation\/\">\u2190 SmartDisk II documentation home<\/a> \u00b7 Page 2 of 16<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-group smtdoc-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\" open><summary>On this page \u2014 9 sections<\/summary>\n<ul class=\"wp-block-list\">\n<li><a href=\"#what-you-get\">What you get<\/a><\/li>\n\n\n\n<li><a href=\"#the-connectors-and-solder-pads-one-by-one\">The connectors and solder pads, one by one<\/a><\/li>\n\n\n\n<li><a href=\"#power\">Power<\/a><\/li>\n\n\n\n<li><a href=\"#what-you-need\">What you need<\/a><\/li>\n\n\n\n<li><a href=\"#installing-it-in-each-machine\">Installing it in each machine<\/a><\/li>\n\n\n\n<li><a href=\"#which-emulation-for-which-connection\">Which emulation for which connection<\/a><\/li>\n\n\n\n<li><a href=\"#the-case\">The case<\/a><\/li>\n\n\n\n<li><a href=\"#building-it-yourself\">Building it yourself<\/a><\/li>\n\n\n\n<li><a href=\"#before-the-first-power-up\">Before the first power-up<\/a><\/li>\n<\/ul>\n<\/details>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">This page shows you what is on the board, how it is powered, how to connect it to your computer and what to check before you switch it on. <\/p>\n\n\n\n<div class=\"wp-block-group smtdoc-callout smtdoc-warn 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:#d63638;border-left-style:solid;border-left-width:4px;background-color:#fdecec;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>Warning.<\/strong> Never connect the ST-Link programmer at the same time as USB or the Apple II. Its voltage regulator is fragile.\nThe silkscreen of the board says <strong>ONLY 1 PWR SRC<\/strong> (3V, 5V, SDIO 3V): use one power source at a time. See &#8220;Power&#8221;.<\/p>\n<\/div>\n\n\n\n<h2 id=\"what-you-get\" class=\"wp-block-heading\">What you get<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The SmartDisk II is one printed circuit board, 76.0 x 56.35 mm, with these parts:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Part<\/th><th>What it is<\/th><\/tr><\/thead><tbody><tr><td>Microcontroller<\/td><td>STM32F411 &#8220;BlackPill&#8221; module, plugged on the board<\/td><\/tr><tr><td>Display<\/td><td>0.96 inch OLED module, 128 x 64 pixels, I2C (1.54 inch on the XL board)<\/td><\/tr><tr><td>Storage<\/td><td>microSD socket, push-push, with a card-detect contact<\/td><\/tr><tr><td>Keys<\/td><td>Four keys: <strong>UP<\/strong>, <strong>DOWN<\/strong>, <strong>ENTER<\/strong>, <strong>RET<\/strong>. On the XL board a rotary encoder replaces <strong>UP<\/strong> and <strong>DOWN<\/strong><\/td><\/tr><tr><td>Reset<\/td><td>The NRST button of the BlackPill module<\/td><\/tr><tr><td>Buzzer<\/td><td>12 mm buzzer: key click, eject and insert sounds, failure sound<\/td><\/tr><tr><td>Drive connector<\/td><td>2 x 10 pin IDC header <code class=\"\" data-line=\"\">J2<\/code> (&#8220;APPLE_SDISKII&#8221;): the ribbon cable to the Apple II<\/td><\/tr><tr><td>USB<\/td><td>The USB connector of the BlackPill module. You use it to update the firmware (see <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_firmware-update\/\">page 04<\/a>)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 id=\"revisions\" class=\"wp-block-heading\">Revisions<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Revision<\/th><th>What it is<\/th><\/tr><\/thead><tbody><tr><td>8<\/td><td>Through-hole keys and connector, soldered by hand. Its gerber files are available on <a href=\"https:\/\/github.com\/vibr77\/AppleIIDiskIIStm32F411\">GitHub<\/a><\/td><\/tr><tr><td><strong>9, SMD<\/strong><\/td><td>The surface-mount keys and connector are placed by machine. The BlackPill, the OLED and the buzzer are fitted by hand<\/td><\/tr><tr><td><strong>9, through-hole<\/strong><\/td><td>Same board as revision 9 SMD, with a through-hole IDC header and through-hole keys, in the same positions as revision 8. It adds a 1N4148 diode <code class=\"\" data-line=\"\">D1<\/code> in parallel with <code class=\"\" data-line=\"\">D2<\/code><\/td><\/tr><tr><td><strong>10, XL<\/strong><\/td><td>The <strong>SmartDisk II XL<\/strong>: a 1.54 inch OLED and a rotary encoder in place of the <strong>UP<\/strong> and <strong>DOWN<\/strong> keys. See &#8220;The XL board&#8221;<\/td><\/tr><\/tbody><\/table><\/figure>\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<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"623\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1-1024x623.png\" alt=\"\" class=\"wp-image-893\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1-1024x623.png 1024w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1-300x183.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1-768x467.png 768w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1-600x365.png 600w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd-1.png 1288w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"623\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl-1024x623.png\" alt=\"\" class=\"wp-image-894\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl-1024x623.png 1024w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl-300x183.png 300w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl-768x467.png 768w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl-600x365.png 600w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smartdiskII_smd_xl.png 1288w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The XL board needs its own firmware image (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_firmware-update\/\">page 04<\/a>).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Rev9<\/strong> <strong>Not released yet on GitHub<\/strong>, What revision 9 changes against the earlier boards:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Additional decoupling capacitor for SDCard and OLED,<\/li>\n\n\n\n<li>Additionnal resistor especially on PA0 (not 5V)<\/li>\n\n\n\n<li>Complete new routing<\/li>\n\n\n\n<li>New LDO to replace power rail on the board,<\/li>\n\n\n\n<li>New Buzzer decoupling to protect the blackpill <\/li>\n<\/ul>\n\n\n\n<h3 id=\"the-xl-board\" class=\"wp-block-heading\">The XL board<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Not released yet on github<\/strong>, The SmartDisk II XL (revision 10) is the revision 9 SMD board with two changes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A 1.54 inch OLED<\/strong> (SSD1309) instead of the 0.96 inch one.<\/li>\n\n\n\n<li><strong>A rotary encoder with a push switch<\/strong> instead of the <strong>UP<\/strong> and <strong>DOWN<\/strong> keys.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">How you use the encoder:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>You do<\/th><th>The board sees<\/th><\/tr><\/thead><tbody><tr><td>Turn clockwise, one click<\/td><td><strong>DOWN<\/strong> (one entry down)<\/td><\/tr><tr><td>Turn counter-clockwise, one click<\/td><td><strong>UP<\/strong> (one entry up)<\/td><\/tr><tr><td>Press the knob<\/td><td><strong>ENTER<\/strong><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>ENTER<\/strong> and <strong>RET<\/strong> keys stay on the board and work as before: <strong>ENTER<\/strong> and the push of the encoder do the same thing. A turn of the knob replaces a held <strong>UP<\/strong> or <strong>DOWN<\/strong> key: to go down a long list, keep turning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The rest of the board is the same as revision 9: the same connector, the same power jumpers, the same SD socket. Differences you may notice:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>There is no 0.96 inch OLED, no <strong>UP<\/strong> and <strong>DOWN<\/strong> key and no <code class=\"\" data-line=\"\">J5<\/code> debug header.<\/li>\n\n\n\n<li>The bypass pad <code class=\"\" data-line=\"\">BPR1<\/code> does not exist: <code class=\"\" data-line=\"\">R1<\/code> stays in the circuit.<\/li>\n\n\n\n<li>The UART header <code class=\"\" data-line=\"\">J4<\/code> has two pins: TX and GND.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The XL board runs the <strong>XL firmware<\/strong>, and the standard board runs the standard firmware. Check which file you download (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_firmware-update\/\">page 04<\/a>).<\/p>\n\n\n\n<h2 id=\"the-connectors-and-solder-pads-one-by-one\" class=\"wp-block-heading\">The connectors and solder pads, one by one<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This section describes revision 9 (SMD and through-hole). The XL board has the same pads, except where &#8220;The XL board&#8221; above says otherwise.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Ref<\/th><th>What<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td><code class=\"\" data-line=\"\">J2<\/code><\/td><td>2 x 10 IDC header, &#8220;APPLE_SDISKII&#8221;<\/td><td>The cable to the Apple II (and, with an adapter, to the IIgs and Macintosh ports). The pin table is below<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">J1<\/code> &#8220;PWR&#8221;, silkscreen <strong>5V<\/strong><\/td><td>1 x 2 pin header<\/td><td>Pin 1: the 5 V pin of the BlackPill. Pin 2: the Apple 5 V after the fuse and the diode. A jumper here joins them. The solder pad <code class=\"\" data-line=\"\">JP1<\/code> makes the same connection<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">J7<\/code> &#8220;PWR&#8221;, silkscreen <strong>3V<\/strong><\/td><td>1 x 2 pin header<\/td><td>Pin 1: the 3.3 V rail of the board (OLED, SD socket, pull-ups, the 3.3 V pins of the BlackPill). Pin 2: the output of the board regulator <code class=\"\" data-line=\"\">U1<\/code>. A jumper here feeds the rail from <code class=\"\" data-line=\"\">U1<\/code>. The solder pad <code class=\"\" data-line=\"\">JP2<\/code> makes the same connection<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">J4<\/code> &#8220;UART&#8221;<\/td><td>3 pin header (2 pins on the XL board)<\/td><td>TX, RX, GND: the console log of the firmware, 460800 baud, 3.3 V levels<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">J5<\/code> &#8220;DEBUG&#8221;<\/td><td>4 pin header (not on the XL board)<\/td><td>Test points for a logic analyser<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">J6<\/code> &#8220;STLINK&#8221;<\/td><td>4 pin header<\/td><td>3V, SDIO (SWDIO), SCK (SWCLK), GND: the ST-Link programmer<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">BPF1<\/code><\/td><td>solder pad, open<\/td><td>Bypasses the fuse <code class=\"\" data-line=\"\">Fu1<\/code><\/td><\/tr><tr><td><code class=\"\" data-line=\"\">BPR1<\/code>, <code class=\"\" data-line=\"\">BPR2<\/code>, <code class=\"\" data-line=\"\">BPR3<\/code><\/td><td>solder pads, open<\/td><td>Each bypasses one 330 ohm series resistor: <code class=\"\" data-line=\"\">R1<\/code> on WR_PROTECT (pin 20), <code class=\"\" data-line=\"\">R2<\/code> on the 3.5 inch select line (pin 7), <code class=\"\" data-line=\"\">R3<\/code> on SELECT (pin 12)<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">D2<\/code><\/td><td>SS54 diode<\/td><td>In series after the fuse<\/td><\/tr><tr><td><code class=\"\" data-line=\"\">Fu1<\/code><\/td><td>resettable fuse, 750 mA<\/td><td>In series on the 5 V that comes from the drive connector<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Notes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The pin headers <code class=\"\" data-line=\"\">J1<\/code>, <code class=\"\" data-line=\"\">J4<\/code>, <code class=\"\" data-line=\"\">J5<\/code>, <code class=\"\" data-line=\"\">J6<\/code>, <code class=\"\" data-line=\"\">J7<\/code> and the solder pads are not fitted by the assembly house: you solder them if you need them.<\/li>\n\n\n\n<li>All solder pads are open as designed. Leave the bypass pads open unless you know why you close them.<\/li>\n\n\n\n<li>The 330 ohm resistors protect the lines that the Apple II writes on (pins 7 and 12) and the one the board drives (pin 20).<\/li>\n<\/ul>\n\n\n\n<h3 id=\"the-20-pin-header-j2\" class=\"wp-block-heading\">The 20 pin header J2<\/h3>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Pin<\/th><th>Signal<\/th><th>Role<\/th><\/tr><\/thead><tbody><tr><td>1, 3, 5<\/td><td>GND<\/td><td>ground<\/td><\/tr><tr><td>2<\/td><td>STEP0 (phase 0)<\/td><td>head stepper phase 0; SmartPort PH0; 3.5 inch CA0 (through 1.5 kohm)<\/td><\/tr><tr><td>4<\/td><td>STEP1<\/td><td>phase 1; 3.5 inch CA1<\/td><\/tr><tr><td>6<\/td><td>STEP2<\/td><td>phase 2; 3.5 inch CA2<\/td><\/tr><tr><td>7<\/td><td>3.5DSK<\/td><td>the 3.5 inch drive select (low when a 3.5 inch drive is addressed)<\/td><\/tr><tr><td>8<\/td><td>STEP3<\/td><td>phase 3; 3.5 inch LSTRB<\/td><\/tr><tr><td>10<\/td><td>WR_REQ<\/td><td>write request<\/td><\/tr><tr><td>11<\/td><td>VCC<\/td><td>+5 V from the Apple II<\/td><\/tr><tr><td>12<\/td><td>SELECT<\/td><td>SEL on the 3.5 inch port<\/td><\/tr><tr><td>14<\/td><td>DEVICE_ENABLE<\/td><td>drive enable (active low)<\/td><\/tr><tr><td>16<\/td><td>RD_DATA<\/td><td>read data (on a Macintosh also the status line)<\/td><\/tr><tr><td>18<\/td><td>WR_DATA<\/td><td>write data<\/td><\/tr><tr><td>20<\/td><td>WR_PROTECT<\/td><td>write protect (on the 3.5 inch port: the sense line; on a Macintosh an input to the drive)<\/td><\/tr><tr><td>9, 13, 15, 17, 19<\/td><td>not connected<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h2 id=\"power\" class=\"wp-block-heading\">Power<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The 5 V of the Apple II arrives on connector pin 11 and goes through the fuse <code class=\"\" data-line=\"\">Fu1<\/code> (750 mA) and the diode <code class=\"\" data-line=\"\">D2<\/code>, then to the 3.3 V regulator <code class=\"\" data-line=\"\">U1<\/code> (TLV1117LV33). The regulator accepts at most 5.5 V: never feed the power pins with more.\nThe BlackPill has its own regulator and its own USB connector. Its 5 V pin and its 3.3 V pins are what the two jumpers connect to.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The text printed on the board:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"\" data-line=\"\">WARNING:\nONLY 1 PWR SRC\n- 3V\n- 5V\n- SDIO 3V\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">&#8220;3V&#8221; is the <code class=\"\" data-line=\"\">J7<\/code> \/ <code class=\"\" data-line=\"\">JP2<\/code> pair, &#8220;5V&#8221; is the <code class=\"\" data-line=\"\">J1<\/code> \/ <code class=\"\" data-line=\"\">JP1<\/code> pair and &#8220;SDIO 3V&#8221; is pin 1 of the ST-Link header <code class=\"\" data-line=\"\">J6<\/code>. The board takes <strong>one<\/strong> power source at a time.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Situation<\/th><th>What to do<\/th><\/tr><\/thead><tbody><tr><td>Running in the Apple II or the Macintosh<\/td><td>The computer is the only source. Close <strong>one<\/strong> of the two pairs: <code class=\"\" data-line=\"\">J1<\/code> \/ <code class=\"\" data-line=\"\">JP1<\/code> (&#8220;5V&#8221;: the Apple 5 V feeds the BlackPill, which makes its own 3.3 V) or <code class=\"\" data-line=\"\">J7<\/code> \/ <code class=\"\" data-line=\"\">JP2<\/code> (&#8220;3V&#8221;: the regulator <code class=\"\" data-line=\"\">U1<\/code> makes the 3.3 V for everything). Never close both<\/td><\/tr><tr><td>Updating the firmware over USB<\/td><td>USB is the only source: take the board out of the computer and remove the jumpers on <code class=\"\" data-line=\"\">J1<\/code> and <code class=\"\" data-line=\"\">J7<\/code><\/td><\/tr><tr><td>Flashing the bootloader with an ST-Link<\/td><td>The ST-Link is the only source: no USB, no Apple II, no jumpers on <code class=\"\" data-line=\"\">J1<\/code> and <code class=\"\" data-line=\"\">J7<\/code><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A power-up without a card is safe: the board shows <code class=\"\" data-line=\"\">SD EJECTED<\/code> and waits for the card.<\/p>\n\n\n\n<h2 id=\"what-you-need\" class=\"wp-block-heading\">What you need<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>For<\/th><th>You need<\/th><\/tr><\/thead><tbody><tr><td>Every machine<\/td><td>A microSD card prepared as on <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_sd-card\/\">page 03<\/a>, and a 20 conductor ribbon cable with a 2 x 10 socket for <code class=\"\" data-line=\"\">J2<\/code><\/td><\/tr><tr><td>II+, IIe (Disk II emulation)<\/td><td>A <strong>Disk II controller card<\/strong> in a slot (slot 6 to boot), and the ribbon from the drive connector of that card to <code class=\"\" data-line=\"\">J2<\/code><\/td><\/tr><tr><td>II+, IIe (SmartPort emulation)<\/td><td>A card that speaks SmartPort: Liron, SoftSP6 or Yellowstone<\/td><\/tr><tr><td>IIc, IIgs<\/td><td>A cable from the drive port (DB-19) of the computer to the 20 pin header, wired as the table of <code class=\"\" data-line=\"\">J2<\/code> above<\/td><\/tr><tr><td>Macintosh<\/td><td>A cable from the external floppy port (DB-19) to the 20 pin header<\/td><\/tr><tr><td>Firmware work<\/td><td>A USB cable for the BlackPill. An ST-Link programmer only to install the bootloader the first time (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_firmware-update\/\">page 04<\/a>)<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Three lines of the Macintosh floppy port are worth knowing when you make a cable:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>DB-19 pin<\/th><th>Header pin<\/th><th>What it does<\/th><\/tr><\/thead><tbody><tr><td>4<\/td><td>7<\/td><td>ground on a Macintosh (so the select line reads low)<\/td><\/tr><tr><td>10<\/td><td>20<\/td><td>an <strong>input<\/strong> to the drive on a Macintosh: the board never drives it<\/td><\/tr><tr><td>17<\/td><td>14<\/td><td>the external drive enable<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">On the Macintosh the status line moves to the read data pin (header pin 16). All the other lines are used as for the IIgs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pin 1 of <code class=\"\" data-line=\"\">J2<\/code> is a ground pin. Match the marked wire of the ribbon (the red one) to pin 1 and check the cable against the table above before you power anything.<\/p>\n\n\n\n<h2 id=\"installing-it-in-each-machine\" class=\"wp-block-heading\">Installing it in each machine<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Always: the Apple II or Macintosh is <strong>off<\/strong>, the board has <strong>no other power source<\/strong>, and you insert the card last. Switch the computer off before you plug or unplug the cable.<\/p>\n\n\n\n<h3 id=\"apple-ii-ii-europlus-iie-with-a-disk-ii-controller-card\" class=\"wp-block-heading\">Apple II+, II Europlus, IIe, with a Disk II controller card<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Switch the computer off.<\/li>\n\n\n\n<li>Plug the ribbon onto the drive connector of the Disk II controller card (slot 6 to boot from it) and onto <code class=\"\" data-line=\"\">J2<\/code> of the board.<\/li>\n\n\n\n<li>Set the power pair for the computer as described in &#8220;Power&#8221;.<\/li>\n\n\n\n<li>Insert the SD card, then switch the computer on.<\/li>\n\n\n\n<li>The splash and then the main menu appear on the OLED. In <strong>Settings<\/strong>, choose the emulation type <strong>Disk II<\/strong> if it is not the one in use. A card without a configuration file starts with Disk II.<\/li>\n\n\n\n<li>Mount an image from the file manager and boot the computer (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">Disk II emulation (5.25 inch)<\/a>).<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The same firmware and the Smartloader work on a stock IIe.<\/p>\n\n\n\n<h3 id=\"with-a-smartport-card-in-a-ii-or-iie-liron-softsp6-yellowstone\" class=\"wp-block-heading\">With a SmartPort card in a II+ or IIe (Liron, SoftSP6, Yellowstone)<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Proceed as above, with the ribbon on the connector of the SmartPort card, and choose the emulation type <strong>SmartPort HD<\/strong> in Settings (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">SmartPort emulation (hard disk)<\/a>).<\/p>\n\n\n\n<h3 id=\"apple-iic\" class=\"wp-block-heading\">Apple IIc<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Switch the IIc off.<\/li>\n\n\n\n<li>Connect the board to the external drive port (DB-19) of the IIc.<\/li>\n\n\n\n<li>Choose Disk II or SmartPort HD emulation (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">08<\/a>, <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">09<\/a>).<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">The IIc ROM 4 is supported.<\/p>\n\n\n\n<h3 id=\"apple-iigs\" class=\"wp-block-heading\">Apple IIgs<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Switch the IIgs off.<\/li>\n\n\n\n<li>Connect the board to the disk port (DB-19) of the IIgs.<\/li>\n\n\n\n<li>Choose the emulation: Disk II (5.25 inch port), SmartPort, Smartloader, or the 3.5 inch drive (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">08<\/a>, <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">09<\/a>, <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartloader\/\">Smartloader<\/a>, <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_3-5-inch\/\">3.5 inch drive emulation (IIgs and Macintosh)<\/a>).<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A IIgs ROM 03 boots Disk II images, SmartPort images, the Smartloader and 3.5 inch images from the DB-19 port. The IIgs asks the SmartPort bus before it boots a 5.25 inch disk: the Disk II emulation ignores its own enable line then, so you do nothing special.<\/p>\n\n\n\n<div class=\"wp-block-group smtdoc-callout smtdoc-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> A IIgs with an accelerator card can write to a Disk II image with a timing that is off by one cycle. If writes fail on one machine only, run the IIgs at normal speed first.<\/p>\n<\/div>\n\n\n\n<h3 id=\"macintosh-with-an-external-800k-floppy-port\" class=\"wp-block-heading\">Macintosh with an external 800K floppy port<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>In <strong>Settings<\/strong>, set the emulation type to <strong>Disk 3.5<\/strong>.<\/li>\n\n\n\n<li>Switch <strong>3.5 Mac host<\/strong> on. ENTER on it asks (<strong>ENTER: host+reset<\/strong>). ENTER again saves it and the SmartDisk II <strong>restarts<\/strong>. The setting changes how the board drives its pins and is read when the emulation starts.<\/li>\n\n\n\n<li>Switch <strong>3.5 write<\/strong> on only if the Macintosh should write to the image.<\/li>\n\n\n\n<li>Mount an image (<code class=\"\" data-line=\"\">.dc42<\/code>, <code class=\"\" data-line=\"\">.2mg<\/code>, <code class=\"\" data-line=\"\">.po<\/code>, <code class=\"\" data-line=\"\">.img<\/code> or <code class=\"\" data-line=\"\">.moof<\/code>) from the menu.<\/li>\n\n\n\n<li>Switch the Macintosh <strong>off<\/strong> and connect the board to the external floppy port (DB-19). To start from the image, start with the internal drive empty: a Macintosh looks at its internal drive first.<\/li>\n\n\n\n<li>Switch the Macintosh on.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">A Macintosh SE on its external drive port sees the drive, reads an image, and can write to it: Initialize of a blank 800K image completes. An HFS image made with Create disk is recognised.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The setting <strong>3.5 SuperDrive<\/strong> (experimental) is in the same list when 3.5 Mac host is on. It makes the board answer as a SuperDrive, for 1.44 MB images on Macintosh models whose ROM supports one. ENTER asks, then saves and restarts the board.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Macintosh mode, the eject and the images are described on <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_3-5-inch\/\">3.5 inch drive emulation (IIgs and Macintosh)<\/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=\"512\" height=\"256\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_settings_disk35_mac_host_on.png\" alt=\"Settings with 3.5 Mac host switched on\" class=\"wp-image-758\" style=\"border-radius:6px;width:256px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_settings_disk35_mac_host_on.png 512w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_settings_disk35_mac_host_on-300x150.png 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><figcaption class=\"wp-element-caption\">Settings with 3.5 Mac host switched on<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>HD20 emulation (Macintosh): upcoming.<\/strong> It is not available in this firmware yet. The list of emulation types already shows an <strong>HD20 (Mac)<\/strong> entry: do not choose it, it does not work yet.<\/p>\n\n\n\n<h2 id=\"which-emulation-for-which-connection\" class=\"wp-block-heading\">Which emulation for which connection<\/h2>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>You connect to<\/th><th>Choose in Settings, Emulation type<\/th><th>Page<\/th><\/tr><\/thead><tbody><tr><td>II+, II Europlus, IIe, Disk II controller card<\/td><td>Disk II<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">08<\/a><\/td><\/tr><tr><td>II+, IIe, SmartPort card<\/td><td>SmartPort HD<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">09<\/a><\/td><\/tr><tr><td>IIc (external drive port)<\/td><td>Disk II or SmartPort HD<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">08<\/a>, <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">09<\/a><\/td><\/tr><tr><td>IIgs, 5.25 inch boot<\/td><td>Disk II<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_disk-ii\/\">08<\/a><\/td><\/tr><tr><td>IIgs, hard disk volumes<\/td><td>SmartPort HD<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartport\/\">09<\/a><\/td><\/tr><tr><td>IIgs, browse and boot from the Apple II screen<\/td><td>Smartloader<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartloader\/\">10<\/a><\/td><\/tr><tr><td>IIgs, 3.5 inch drive<\/td><td>Disk 3.5 (3.5 Mac host off)<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_3-5-inch\/\">11<\/a><\/td><\/tr><tr><td>Macintosh external 800K port<\/td><td>Disk 3.5 with 3.5 Mac host on<\/td><td><a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_3-5-inch\/\">11<\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The Smartloader works on the IIe and the IIgs (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_smartloader\/\">10<\/a>).<\/p>\n\n\n\n<h2 id=\"the-case\" class=\"wp-block-heading\">The case<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The project has the files of a 3D printed case: a body in two variants (one for a high buzzer, one for a low buzzer), a top, a screen template, a navigation key, a key and a reset key, and the Fusion 360 file of the whole case.<\/p>\n\n\n\n<h2 id=\"building-it-yourself\" class=\"wp-block-heading\">Building it yourself<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The gerber files of revision 8 are available on the project page on GitHub: <a href=\"https:\/\/github.com\/vibr77\/AppleIIDiskIIStm32F411\">https:\/\/github.com\/vibr77\/AppleIIDiskIIStm32F411<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You fit the <strong>BlackPill<\/strong> module, the <strong>OLED<\/strong> module and the buzzer by hand.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A new board needs the bootloader first (with an ST-Link on <code class=\"\" data-line=\"\">J6<\/code>), then the firmware over USB: <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_firmware-update\/\">Firmware update<\/a>.<\/p>\n\n\n\n<h2 id=\"before-the-first-power-up\" class=\"wp-block-heading\">Before the first power-up<\/h2>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>One power source.<\/strong> Only one of <code class=\"\" data-line=\"\">J1<\/code> \/ <code class=\"\" data-line=\"\">JP1<\/code>, <code class=\"\" data-line=\"\">J7<\/code> \/ <code class=\"\" data-line=\"\">JP2<\/code> closed, as the silkscreen says. No ST-Link, USB and Apple II together.<\/li>\n\n\n\n<li><strong>The OLED.<\/strong> The module pins on the board are in the order GND, +3.3V, SCL, SDA. Some OLED modules have the supply pins in the other order: compare your module with the silkscreen before you plug it in.<\/li>\n\n\n\n<li><strong>The cable.<\/strong> Check the orientation of the ribbon on <code class=\"\" data-line=\"\">J2<\/code> and on the Disk II controller card.<\/li>\n\n\n\n<li><strong>The card.<\/strong> FAT32 with 32 KB clusters, or use Make filesystem (<a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_sd-card\/\">The SD card<\/a>). Without a card the board shows <code class=\"\" data-line=\"\">SD EJECTED<\/code>.<\/li>\n\n\n\n<li><strong>On a board you built.<\/strong> Look for solder bridges on <code class=\"\" data-line=\"\">J2<\/code> and on the BlackPill pins. Check with a multimeter that the 5 V and 3.3 V rails are not shorted to ground. Check the diode and the fuse.<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">At the first start you see the splash with the logo and the version, for about half a second, then the main menu.\nA card without a configuration file gets a new <code class=\"\" data-line=\"\">sdiskConfig.json<\/code> with the defaults: emulation Disk II, start at the menu (not on the last image), no sound, no screen saver, &#8220;5.25 write&#8221; on.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"256\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_splash.png\" alt=\"the splash screen: logo and the version in the corner\" class=\"wp-image-789\" style=\"border-radius:6px;width:256px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_splash.png 512w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_splash-300x150.png 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><figcaption class=\"wp-element-caption\">the splash screen: logo and the version in the corner<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">If the display shows <strong>Warning, ERROR: SD EJECTED<\/strong>, the card is not detected:<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized has-custom-border\"><img loading=\"lazy\" decoding=\"async\" width=\"512\" height=\"256\" src=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_error_sd_ejected.png\" alt=\"the error screen when the card is out\" class=\"wp-image-692\" style=\"border-radius:6px;width:256px;height:auto\" srcset=\"https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_error_sd_ejected.png 512w, https:\/\/www.r3tr0.net\/wp-content\/uploads\/2026\/10\/smtdoc_error_sd_ejected-300x150.png 300w\" sizes=\"auto, (max-width: 512px) 100vw, 512px\" \/><figcaption class=\"wp-element-caption\">the error screen when the card is out<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Then see <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_troubleshooting\/\">Troubleshooting, FAQ and the log<\/a>. The screens and keys are on <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_usage-guide\/\">Usage guide<\/a> and <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/smtdoc_oled-screens\/\">OLED screens reference<\/a>.<\/p>\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:#1e7a45;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\/smartdisk-ii-documentation\/\">Overview and features<\/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:#1e7a45;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\/smartdisk-ii-documentation\/smtdoc_sd-card\/\">The SD card<\/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\">SmartDisk II user documentation \u00b7 latest firmware \u00b7 <a href=\"https:\/\/www.r3tr0.net\/index.php\/smartdisk-ii-documentation\/\">Documentation home<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The SmartDisk II board and its XL variant, the connectors and power jumpers, how to connect it to an Apple II, IIc, IIgs or Macintosh, which emulation to pick for which connection, and what to check before the first power-up.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":792,"menu_order":2,"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":[46,45],"class_list":["post-793","page","type-page","status-publish","hentry","tag-apple-ii","tag-smartdisk"],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/pages\/793","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/comments?post=793"}],"version-history":[{"count":7,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/pages\/793\/revisions"}],"predecessor-version":[{"id":934,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/pages\/793\/revisions\/934"}],"up":[{"embeddable":true,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/pages\/792"}],"wp:attachment":[{"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/media?parent=793"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.r3tr0.net\/index.php\/wp-json\/wp\/v2\/tags?post=793"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}