Sergey Kiselev

For the ease of construction I use inexpensive and readily available PC 104-key keyboard keycaps. And so I won't be able to change the button size (PC keyboards simply don't...

The address bus is 16-bit, so the addressable memory is limited to 64 KB. There are ways around this limitation, usually by "paging" the memory. MSX2 memory mapper, and MegaROMs...

@alex3331 I believe I've provided you the information in the email. Closing the issue

It might be not VDP related at all. The MSX BIOS will not produce any video if RAM or RTC are not working. I can recommend trying C-BIOS image first,...

I might be mistaken, since I haven't used my Omega with RGB, but I think RGB monitors, at least with SCART, use Composte signal for synchronization

I personally use S-Video. Composite video also works for me, although with lower quality. Several people reported success with using RGB monitors or TVs with SCART connector (common in Europe)....

Analog RGB voltage is normally much lower than 5V. For example, VGA ranges from 0V (black/no color component) to 0.7V (white/full intensity). CGA and EGA used 5V TTL digital signal,...

Thank you for your suggestions! Generally speaking I'd like to keep this design as simple as practically possible. So some features are intentionally missing. Also at this stage I don't...

I've fixed the following: 1. VDP and CXA1645 power supply now goes through a pair of LC filters. 2. Added a polyfuse for joystick ports... A single 750 mA polyfuse...

A couple of questions: - I think that for color bus it won't be enough to have just the color bus data and the direction signal. At least the dot...