Alena Posted December 29, 2023 Share Posted December 29, 2023 I think I’ll stick with a simple 2K game. Thinking of reverse engineering the ZX81 chess and adapting it to 6509. If 4K is necessary, it will be so. 1 Quote Link to comment Share on other sites More sharing options...
+Bruce-Robert Pocock Posted December 29, 2023 Share Posted December 29, 2023 did you meant 6509 (1 megabyte large memory edition of the 6502) or 6507 (small footprint cost reduced version of the 6502 used in the 2600)? Quote Link to comment Share on other sites More sharing options...
Alena Posted December 29, 2023 Author Share Posted December 29, 2023 Ah, I meant 6507. Thanks for correcting me! 1 Quote Link to comment Share on other sites More sharing options...
+Bruce-Robert Pocock Posted December 29, 2023 Share Posted December 29, 2023 easy to go down a rabbit hole there good luck! Quote Link to comment Share on other sites More sharing options...
+MarcoJ Posted December 29, 2023 Share Posted December 29, 2023 1 hour ago, Alena said: reverse engineering the ZX81 I did some Z80 to 6502 conversion for Pitkat a few years back. The main differences were the general registers had to be substituted with zero page ram, 16 bit additions had to be substituted with 8 bit additions and the carry had an inverted meaning. 1 Quote Link to comment Share on other sites More sharing options...
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