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Re: Best CGA & Hercules monochrome games

Posted on 2024-12-21, 09:07

Btw, about Chinese CGAs and Book8088 and related stuff, there is a GitHub repo with the information here: https://github.com/pengan1987/book8088stories All the projects seem to originate from Chinese electornics enthusiast forum MyDigit.cn and are culmination of sevral years of development. It's …

Re: Original Adlib 1987 burnt trace

Posted on 2024-12-18, 19:32

Aside from the obvious voltage rating discrepancy - 25V vs. the original 16V - that part looks perfectly adequate. It is probably even better than the original specifically because of the higher voltage rating, but might therefore also be a little bit bigger.

Re: Best CGA & Hercules monochrome games

Posted on 2024-07-08, 12:34

OldCat wrote on 2024-07-08, 11:51: I know it can be done because I did it. But it is nowhere near to 100% speed, sadly. Have you published the source code somewhere or (if not) have you considered doing so? Is it a purely interpreting emulator or does it incorporate dynamic binary translation, too, …

Re: Planet X3 Open Source Edition

Posted on 2024-02-01, 18:05

As of yesterday, you can download and build version 1.1.0, which incorporates the following changes: Implementation of the two previously reserved EGA modes (i.e. 640x350 3-color and 320x200 16-color) Fix bug in LUT patching for tile set overrides Fix bug in radar LUT (existed since PX3 OSE 1.0.0) …

Re: 640x200 4c on regular CGA board possible?

Posted on 2023-09-15, 17:52

That would indeed be a very nice and simple mod! Bit 4 or 5 of the palette register would be a good one to choose as it otherwise has no effect in text modes. Since only half of the bit patterns are needed (you can get the others by swapping the foreground and background colours) you could use half …

Re: 640x200 4c on regular CGA board possible?

Posted on 2023-09-14, 20:13

I wonder if it's possible to have 640x200 in 4 colours on a regular CGA card. Assuming that 32 KB were physically available (as piggy back) and that no aliasing happens (BC000-BFFFF range is an alias of B8000-BBFFF, the primary CGA page). And most importantly, how would the memory layout look like …

Re: Q(uick)Basic Screen Modes

Posted on 2023-09-06, 20:08

in Milliways
IIRC, all of ATI's CGA-based Graphics Solution cards were initially advertised as "Small Wonder", even if the card itself did not always say that. You can find links to more information and a small proof-of-concept bitmap viewer in one of my earlier posts.

Re: Leading Edge Model D non-standard CGA mode

Posted on 2023-08-31, 20:28

The Model D computers support a special extended graphics mode (EGA): 640x200 The Schneider/Amstrad PC1512 has such a special 640x200 16c mode, too. PCem/86Box support that machine model. http://dosdays.co.uk/computers/Amstrad%20PC1000/amstrad_pc1000.php Wasn't the PC1512's VDU an Amstrad ASIC, …

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