INT 31 P - DPMIsee DOS Protected-Mode Interface 0.9+ - LOCK LINEAR REGION AX = 0600h BX:CX = starting linear address SI:DI = size of region in bytes Return: CF clear if successful CF set on error none of the memory is locked AX = error code (DPMIsee DOS Protected-Mode Interface 1.0+) (8013h,8017h,8025h) (see #03143) Notes: pages at beginning and end will be locked if the region overlaps them may be called multiple times for a given page; the DPMIsee DOS Protected-Mode Interface host keeps a lock count for each page SeeAlso: AX=0004h,AX=0601h,INT 21/AX=251Ah,INT 21/AX=EB06h