Int 31/AX=0801h

AX = 0801h
BX:CX = linear address returned by AX=0800h

Return:
CF clear if successful
CF set on error
AX = error code (8025h) (see #03143)

Note: Should be called at end of access to device mapped with AX=0800h

See Also: AX=0508h - AX=0509h - AX=0800h - INT 21/AX=EB03

Category: DOS Extenders - Int 31h - D