collapseos/blk/633
Virgil Dupras 440ea43a88 z80a: make mnemonic names more uniform across assemblers
Initially, I used the same letters as those used in the z80 ref
docs, but it makes the different assemblers harder to use than they
should. Having consistent "argtype" rules across assemblers should
help.
2020-06-27 22:01:56 -04:00

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CODE _status
A 0b11111101 LDri, ( TH output, unselected )
PAD_CTLPORT OUTiA,
PAD_D1PORT INAi,
0x3f ANDi, ( low 6 bits are good )
B A LDrr, ( let's store them )
( Start and A are returned when TH is selected, in bits 5 and
4. Well get them, left-shift them and integrate them to B. )
A 0b11011101 LDri, ( TH output, selected )
PAD_CTLPORT OUTiA,
PAD_D1PORT INAi,
0b00110000 ANDi,
A SLA, A SLA, B ORr,
PUSHA,
;CODE