mirror of
https://github.com/hsoft/collapseos.git
synced 2024-11-06 02:31:01 +11:00
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$
|
|
10 0 DO _idle DROP LOOP
|
|
0 ( dummy ) 10 0 DO ( r )
|
|
DROP 0x40 0 0 SDCMDR1 ( CMD0 )
|
|
DUP 0x01 = IF LEAVE THEN
|
|
LOOP 0x01 = NOT IF _err THEN
|
|
0x48 0 0x1aa ( CMD8 ) SDCMDR7 ( r arg1 arg2 )
|
|
0x1aa = NOT IF _err THEN ( arg2 check )
|
|
0 = NOT IF _err THEN ( arg1 check )
|
|
0x01 = NOT IF _err THEN ( r check )
|
|
BEGIN
|
|
0x77 0 0 SDCMDR1 ( CMD55 )
|
|
0x01 = NOT IF _err THEN
|
|
0x69 0x4000 0x0000 SDCMDR1 ( CMD41 )
|
|
DUP 0x01 > IF _err THEN
|
|
NOT UNTIL ; ( out of idle mode, success! )
|