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collapseos/recipes/rc2014/sdcard/sdinit.asm

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.equ JUMP_PRINTSTR 0x03
.equ JUMP_PRINTHEX 0x06
.equ JUMP_SDCINITALIZE 0x09
.equ JUMP_SDCSENDRECV 0x0c
.equ JUMP_SDCWAITRESP 0x0f
.equ JUMP_SDCCMD 0x12
.equ JUMP_SDCCMDR1 0x15
.equ JUMP_SDCCMDR7 0x18
.equ JUMP_SDCREAD 0x1b
.equ JUMP_SDCSETBLKSIZE 0x1e
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.org 0x9000
call JUMP_SDCINITALIZE
or a
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jp nz, error
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ld hl, sOk
call JUMP_PRINTSTR
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call JUMP_SDCSETBLKSIZE
or a
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jp nz, error
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ld hl, sOk
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call JUMP_PRINTSTR
; read sector 0
xor a
call JUMP_SDCREAD
or a
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jp nz, error
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push hl
ld hl, sOk
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call JUMP_PRINTSTR
pop hl
; SDC buffer address is in HL
; YOLO! print it!
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call JUMP_PRINTSTR
ret
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error:
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call JUMP_PRINTHEX
ld hl, sErr
call JUMP_PRINTSTR
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ret
sOk:
.db "Ok", 0xa, 0xd, 0
sErr:
.db "Err", 0xa, 0xd, 0