22 lines
534 B
ArmAsm
22 lines
534 B
ArmAsm
// #LAYOUT# STD * #TAKE
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// #LAYOUT# * BASIC_0 #TAKE
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// #LAYOUT# * * #IGNORE
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select_device:
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// Take last device number, make sure it is a drive - 8 or above. Above 30,
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// although illegal for IEC we also consider a drive, as they exists
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// drivers assigning these numbers to CBM-DOS capable devices - like some
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// IEEE-488 carts.
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//
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// If current device is not a drive, set device to 8 (first drive number)
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// Device number is left in X, for SETFLS Kernal routine
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ldx FA
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cpx #$08
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bcs !+
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ldx #$08
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!:
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rts
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