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55 lines
1.0 KiB
ArmAsm
55 lines
1.0 KiB
ArmAsm
;
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; Oliver Schmidt, 2010-05-24
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;
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; int __fastcall__ rootdir (unsigned char drive, char* buf);
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;
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.export _rootdir
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.import popax, oserrexit
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.include "zeropage.inc"
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.include "errno.inc"
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.include "mli.inc"
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_rootdir:
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; Save buf
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sta ptr1
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stx ptr1+1
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; Set buf
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sta mliparam + MLI::ON_LINE::DATA_BUFFER
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stx mliparam + MLI::ON_LINE::DATA_BUFFER+1
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; Set drive
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jsr popax
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sta mliparam + MLI::ON_LINE::UNIT_NUM
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; Get volume name
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lda #ON_LINE_CALL
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ldx #ON_LINE_COUNT
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jsr callmli
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bcs oserr
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; Get volume name length
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ldy #$00
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lda (ptr1),y
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and #15 ; Max volume name length
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sta tmp1
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; Add leading slash
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lda #'/'
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sta (ptr1),y
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; Add terminating zero
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ldy tmp1
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iny
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lda #$00
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sta (ptr1),y
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; Return success
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tax
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rts
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; Return oserror
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oserr: jmp oserrexit
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