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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.
5 lines
107 B
Plaintext
5 lines
107 B
Plaintext
Sega Master System Recipe
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602 VDP 610 PAD
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620 KBD 625 Ports
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