56 lines
673 B
ArmAsm
56 lines
673 B
ArmAsm
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;
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; Unit number handling. For detailed description see 'm65dos_bridge.s' file
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;
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dos_UNITNUM:
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jsr dos_ENTER
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; Check if memory content is not damaged
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jsr dos_MEMCHK
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bcs dos_UNITNUM_fail
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lda REG_A
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; Check what kind of device was requested
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cmp #$00
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beq dos_UNITNUM_sdcard
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cmp #$01
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beq dos_UNITNUM_floppy
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cmp #$02
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beq dos_UNITNUM_ramdisk
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; FALLTROUGH
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dos_UNITNUM_fail:
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lda #$00
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jmp dos_EXIT_A_SEC
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dos_UNITNUM_sdcard:
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lda UNIT_SDCARD
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bra dos_UNITNUM_common
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dos_UNITNUM_floppy:
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lda UNIT_FLOPPY
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bra dos_UNITNUM_common
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dos_UNITNUM_ramdisk:
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lda UNIT_RAMDISK
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; FALLTROUGH
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dos_UNITNUM_common:
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cmp #$00
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beq dos_UNITNUM_fail
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jmp dos_EXIT_A
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