Category: DOS extenders
Flags: available only in protected mode
INT 21 - Phar Lap 386/DOS-Extender - MAP PHYSICAL MEMORY AT END OF SEGMENT AX = 250Ah ES = segment selector in the Local Descriptor Table (LDT) of segment to modify EBX = physical base address of memory to map (multiple of 4K) ECX = number of physical 4K pages to map Return: CF clear if successful EAX = 32-bit offset in segment of mapped memory CF set on error EAX = error code 08h insufficient memory to create page tables 09h invalid segment selector SeeAlso: INT 31/AX=0800h