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8d78ca9dac
The SD card driver is a bit too slow to be bearable. I'll write _crc16 in z80 and see how it goes.
17 lines
569 B
Plaintext
17 lines
569 B
Plaintext
: SDC$
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10 0 DO _idle DROP LOOP
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0 ( dummy ) 10 0 DO ( r )
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DROP 0x40 0 0 SDCMDR1 ( CMD0 )
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DUP 0x01 = IF LEAVE THEN
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LOOP 0x01 = NOT IF _err THEN
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0x48 0 0x1aa ( CMD8 ) SDCMDR7 ( r arg1 arg2 )
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0x1aa = NOT IF _err THEN ( arg2 check )
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0 = NOT IF _err THEN ( arg1 check )
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0x01 = NOT IF _err THEN ( r check )
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BEGIN
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0x77 0 0 SDCMDR1 ( CMD55 )
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0x01 = NOT IF _err THEN
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0x69 0x4000 0x0000 SDCMDR1 ( CMD41 )
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DUP 0x01 > IF _err THEN
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NOT UNTIL ; ( out of idle mode, success! )
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