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cc65/libsrc/apple2/drives.s
ol.sc 1bbbed5e96 Added functions to learn about the unit numbers of the ProDOS 8 devices found.
git-svn-id: svn://svn.cc65.org/cc65/trunk@4663 b7a2c559-68d2-44c3-8de9-860c34a00d81
2010-05-24 20:10:19 +00:00

39 lines
677 B
ArmAsm

;
; Oliver Schmidt, 2010-05-24
;
; unsigned char drivecount (void);
; unsigned char* drivelist (void);
;
.export _drivecount, _drivelist
.import __dos_type
.include "mli.inc"
_drivecount:
ldx #$00
; Check for ProDOS 8
lda __dos_type
bne :+
rts
; Number of on-line devices (minus 1)
: ldy DEVCNT
iny
tya
rts
_drivelist:
ldx #$00
; Check for ProDOS 8
lda __dos_type
bne :+
rts
; Up to 14 units may be active
: lda #<DEVLST
ldx #>DEVLST
rts