16 lines
581 B
Plaintext
16 lines
581 B
Plaintext
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( Routines for interacting with SMS controller ports.
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Requires CPORT_CTL, CPORT_D1 and CPORT_D2 to be defined.
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Will usually be 0x3f, 0xdc, 0xdd. )
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( mode -- set TR pin on mode a on:
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0= output low 1=output high 2=input )
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CODE _TRA! HL POP, chkPS, ( B0 -> B4, B1 -> B0 )
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L RR, RLA, RLA, RLA, RLA, L RR, RLA,
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0x11 ANDi, L A LDrr, CPORT_CTL INAi,
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0xee ANDi, L ORr, CPORT_CTL OUTiA,
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;CODE
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CODE _THA! HL POP, chkPS, ( B0 -> B5, B1 -> B1 )
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L RR, RLA, RLA, RLA, RLA, L RR, RLA, RLA,
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0x22 ANDi, L A LDrr, CPORT_CTL INAi,
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0xdd ANDi, L ORr, CPORT_CTL OUTiA,
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;CODE
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