Table of Contents
Note: This API call is for DOS personality only. Use Family API for portability.
Int 21H, AH=58H, AL=02H
Version
5 and higher
Brief
GET UMB LINK STATE
Family API
Input
AH = 58h AL = subfunction 02h get UMB link state
Return
CF clear if successful AL = current link state 00h UMBs not part of DOS memory chain 01h UMBs in DOS memory chain CF set on error AX = error code (01h) (see #01680)
Notes
a program which changes the UMB link state should restore it before terminating UMBs will only be available if CONFIG.SYS contains the line DOS=UMB, the UMBs have been linked into the memory chain with AX=5803h, and the allocation strategy has been set to include high memory with AX=5801h
See also
#01687,#02766 at INT 2F/AX=4310h
Note
Text based on Ralf Brown Interrupt List Release 61