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280zzzap and other games #1

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alanswx opened this issue Mar 3, 2020 · 1 comment
Open

280zzzap and other games #1

alanswx opened this issue Mar 3, 2020 · 1 comment

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@alanswx
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alanswx commented Mar 3, 2020

I tried another rom 280zzzap - because I am working through a bug in the FPGA simulation I am working on. When I switched to the 280zzzap rom, it seems like the DAD SP instruction (0x39) hasn't been implemented. I was wondering if you were going to try to get it running with some of the other roms like: blueshrk as well?

Thanks!
@alanswx
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alanswx commented Mar 4, 2020

I answered my own question. The input / output ports - especially the graphics shifter for the sprites, moves around on these games. If you remap it, you can play other games.

the annoying thing is it would require a lookup table like in mame.

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@alanswx