Int 15/AX=5101h

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SYSTEM - later PS/2s - EXPANSION UNIT, RETURN CONFIGURATION NUMBER

AX = 5101h

Return:
CF set if successful AH = 00h AL = current configuration number 00h system unit only FFh configuration not recognized BX = status flag

bits 0-14:
Reserved

bit 15:
Additional data is available (location TBD). CF clear on error AH = status 01h expansion unit is not present 86h function not supported

Note: CF convention is the reverse of the standard convention for this interrupt. (Perhaps a typo in the IBM BIOS Tech Ref?)

Category: Bios - Int 15h - S

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