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collapseos/drv/sdc.z80

22 lines
302 B
Z80 Assembly
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( n -- n )
( Initiate SPI exchange with the SD card. n is the data to
send. )
CODE _sdcSR
HL POPqq,
chkPS,
A L LDrr,
SDC_SPI OUTnA,
NOP, NOP,
SDC_SPI INAn,
L A LDrr,
HL PUSHqq,
;CODE
CODE _sdcSel
SDC_CSLOW OUTnA,
;CODE
CODE _sdcDesel
SDC_CSHIGH OUTnA,
;CODE