Sergey Kiselev

The timing for CGA modes, 640x200 or 640x400 implemented with scan doubling, seems to be a bit off. The picture on my VGA monitors appears to be shifted left significantly....

Memory errors in CheckIt, screen corruption in MDA mode

2

The FPGA byte code from November 20, 2021 (the latest) produces memory errors at certain memory addresses in both MDA and CGA modes. It also results in memory/screen corruption in...

[Olivetti M24](https://en.wikipedia.org/wiki/Olivetti_M24) had mostly CGA compatible display adapter with several enhancements: * The display resolution was 640x400 * Standard CGA graphics modes used scan doubling, very similar to Graphics Gremlin...

VECHO / V8Power relies on video rows count BIOS variable being initialized, but it is not guaranteed to be initialized

2

I've received the a pull request for my 8088 BIOS: https://github.com/skiselev/8088_bios/pull/42 This pull request supposed to fix an issue where the 8088 BIOS does not initialize video row count BIOS...

Microdrive detection timeout

8

This issue is probably a bit geeky (but isn't it all?!). I tried using a Hitachi 6 GB Microdrive, which is an actual spinning hard drive in a CompactFlash form...