Aitor Gómez García

Suggested pull request, along with other major Tandy-related enhancements: https://github.com/schlae/graphics-gremlin/pull/16

I have investigated and discovered something about this issue, and that is that the final timing resulting from the build plays an important role. The most curious thing is that...

With the latest version of yosys (0.11+1) this issue is also corrected, without the need to make changes to the code.

> looks pretty good although i still need to test it on the real hardware. > > one general comment: i'm not a huge fan of renaming _mda_ to _hgc_...

I've added new commits to my fork, but I don't quite know how to add them to this pull request: https://github.com/spark2k06/graphics-gremlin/commits/main 

I add bitstream 3 in my repository, initially with Adlib. Adlib is based on @jotego's JTOPL2. Others can be added later, e.g. CM/S at the same time in the same...

Added Game Blaster (CMS) to Bitstream 3, now together with Adlib: https://github.com/spark2k06/graphics-gremlin/commit/570dd635b6f7d3fd1c2424afc708305da7177bee https://github.com/spark2k06/graphics-gremlin/commit/60bb9b6b04fd7dfc5b2a54f15ddaacd58ec9269c

Improvement taken from the MiSTer PCXT port based on Graphics Gremlin, thanks to which some scenes from the Area5150 demo now look good: https://github.com/spark2k06/graphics-gremlin/commit/42bff7bbfce0fb354c1455531b3c2b86d30055ae  Other graphical glitches were also...

CGA and Hercules CRTC updated to UM6845R https://github.com/spark2k06/graphics-gremlin/commit/8453503e26fb3384a3a737d101b5e054cf8a72e5 before:  after: 

OPL2 / 3 detection method I got from here: https://www.fit.vutbr.cz/~arnost/opl/opl3.html#appendixB And the implementation that I carried out, on several typical I / O ports here: https://github.com/spark2k06/8088_bios/blob/alternative/opl.inc