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collapseos/arch/z80/sms/blk/600

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sms: WIP !
2020-05-15 12:15:31 +10:00
Sega Master System Recipe
sms: don't use BC The PAD driver was broken since IP moved to BC. Oops.
2020-10-07 11:36:29 +11:00
602 VDP 610 PAD
sms: simplify and solidify ports-related drivers Add _TRA!, _THA!, _TRB!, _THB! routines to easily handle those pins' value without stepping on other pins like the drivers previously did. For SDC driver, it's going to be important soon because it turns out that I can't get away with "always on" CS, so I'll need a scheme where it's important that TH/TR pins have stable values.
2020-11-03 10:53:57 +11:00
620 KBD 625 Ports
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