[VLM]

This is a sort-deep link to one page of the site and the main page of the site explains the overall project to design and build one's own XT-clone. Kind of ambitious.

So start with a Pi running around 1/30th normal speed, then get the memory card working and remove that from the pi, then get the video and BIOS support working and remove that from the pi, eventually remove the last thing from the pi and crank the speed up about 30-times faster and you've got a gradually bootstrapped fully operational XT-clone.

Its an interesting project plan, usually people bring up a system by having just CPU and memory at least partially working, then add peripherals like disk, display, rs232, GPIO, etc. But this way you can bring it all up, at least enough to run CP/M (err, ms-dos I guess?), admittedly glacially slowly and mostly emulated, and then upgrade the parts to hardware as see fit.

Could probably do something with a FPGA that would be much more difficult but could at least run full speed (or maybe faster?). Of course in early 2022 what's more unobtanium, RasPis or FPGAs? If you can't buy either I guess it doesn't matter.