![\"\"](\"http:\/\/www.vk1zdj.net\/wp-content\/uploads\/2022\/08\/PSU-detail.png\")
<\/a><\/figure>\n\n\n\nI did cut a hole in the back of the machine for an IEC socket – Now I can use any power cable in the study!<\/p>\n\n\n\n This machine is largely made from boards I have made or collected over the years. It has a Z80 cpu based on a Northstar board and is sporting an epic 16K of RAM on a Salota S100 memory board.<\/p>\n\n\n\n The Salota memory board was particularly interesting. They mixed up CS* and OE* in the original design. A couple of hours with an Xacto knife and a heap of jumper wires and it was sorted.<\/p>\n\n\n\n It runs TinyBasic when it is copied into ram. It will not run the original Microsoft Basic, as the CPU card uses a Z-80, and the Microsoft basic makes 8080 based assumptions on the result of operations that set flags that are not exactly the same as with the Z-80.<\/p>\n\n\n\n I also have a 88-2SIO card that can also provide a monitor rom if required. When using this card, I don’t use the monitor rom in it when I use the the Northstar clone CPU.<\/p>\n\n\n\n Finally – it has a David Griffiths MW640 video card – 64 x 16 video – Those were the days!<\/p>\n\n\n\n <\/p>\n","protected":false},"excerpt":{"rendered":" It’s been an epic week. I got my IMSAI S100 system running. I replaced the 120v linear power supply with a couple of modern switchers – now the system is sooo much lighter, and I can plug it… <\/p>\n","protected":false},"author":1,"featured_media":608,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false},"categories":[34],"tags":[],"jetpack_featured_media_url":"http:\/\/www.vk1zdj.net\/wp-content\/uploads\/2022\/08\/Imsai-Front.png","_links":{"self":[{"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/posts\/565"}],"collection":[{"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=565"}],"version-history":[{"count":1,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/posts\/565\/revisions"}],"predecessor-version":[{"id":618,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/posts\/565\/revisions\/618"}],"wp:featuredmedia":[{"embeddable":true,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=\/wp\/v2\/media\/608"}],"wp:attachment":[{"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=565"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=565"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.vk1zdj.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=565"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n<\/a><\/figure>\n\n\n\n