1.0R3TR0https://www.r3tr0.netrich600338<blockquote class="wp-embedded-content" data-secret="hFzgRaXpdz"><a href="https://www.r3tr0.net/index.php/2025/12/10/resurrecting-an-ibm-8540-psu/">Resurrecting an IBM 8540 PSU</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://www.r3tr0.net/index.php/2025/12/10/resurrecting-an-ibm-8540-psu/embed/#?secret=hFzgRaXpdz" width="600" height="338" title="“Resurrecting an IBM 8540 PSU” — R3TR0" data-secret="hFzgRaXpdz" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !function(d,l){"use strict";l.querySelector&&d.addEventListener&&"undefined"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!/[^a-zA-Z0-9]/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret="'+t.secret+'"]'),o=l.querySelectorAll('blockquote[data-secret="'+t.secret+'"]'),c=new RegExp("^https?:$","i"),i=0;i<o.length;i++)o[i].style.display="none";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute("style"),"height"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):"link"===t.message&&(r=new URL(s.getAttribute("src")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener("message",d.wp.receiveEmbedMessage,!1),l.addEventListener("DOMContentLoaded",function(){for(var e,t,s=l.querySelectorAll("iframe.wp-embedded-content"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute("data-secret"))||(t=Math.random().toString(36).substring(2,12),e.src+="#?secret="+t,e.setAttribute("data-secret",t)),e.contentWindow.postMessage({message:"ready",secret:t},"*")},!1)))}(window,document); //# sourceURL=https://www.r3tr0.net/wp-includes/js/wp-embed.min.js </script> I finally was able to find an IBM PS/2 8540SX in a good esthetic shape with no plastic issue and all the very specific IBM screw on the back. The 8540 was one of the last (with the 8535) to be equipped with ISA bus and not the proprietary Micro Channel bus MCA. The is […]https://www.r3tr0.net/wp-content/uploads/2025/12/yhst-172536426-9_2513_10436792612__85758.jpg12801280