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36 lines
719 B
ArmAsm
36 lines
719 B
ArmAsm
;
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; Oliver Schmidt, 24.03.2005
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;
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; dhandle_t __fastcall__ dio_open (driveid_t drive_id);
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;
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.export _dio_open
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.import return0, __dos_type
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.include "errno.inc"
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.include "mli.inc"
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_dio_open:
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; Check for ProDOS 8
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ldx __dos_type
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bne :+
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lda #$01 ; "Bad system call number"
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bne oserr ; Branch always
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; Walk device list
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: ldx DEVCNT
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: cmp DEVLST,x
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beq :+ ; Found drive_id in device list
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dex
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bpl :-
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lda #$28 ; "No device detected/connected"
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; Return oserror
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oserr: sta __oserror
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jmp return0
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; Return success
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: ldx #$00
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stx __oserror
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rts
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