collapseos/arch/z80/sms/blk/603
Virgil Dupras b97e761942 Add Grid subsystem
The goal is to offload the SMS VDP driver a little bit.
2020-11-09 17:26:15 -05:00

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CODE _ctl ( a -- sends LSB then MSB )
HL POP, chkPS,
A L LDrr, VDP_CTLPORT OUTiA,
A H LDrr, VDP_CTLPORT OUTiA,
;CODE
CODE _data
HL POP, chkPS,
A L LDrr, VDP_DATAPORT OUTiA,
;CODE