Int 31/AX=0D00h

DPMI 1.0+ - ALLOCATE SHARED MEMORY

AX = 0D00h
ES:(E)DI -> shared memory allocation request structure (see #03159)

Return:
CF clear if successful
request structure updated
CF set on error
AX = error code (8012h,8013h,8014h,8016h,8021h) (see #03143)

Note: First 16 bytes of memory block will be initialized to zeros on the first allocation

See Also: AX=0501h - AX=0D01h - AX=0D02h


Format of DPMI shared memory allocation request structure:

Offset  Size    Description     (Table 03159)
00h    DWORD   requested length of shared memory block in bytes
04h    DWORD   (ret) allocated length of block
08h    DWORD   (ret) shared memory handle
0Ch    DWORD   (ret) linear address of memory block
10h    PWORD   selector:offset32 of ASCIZ name for memory block
(name max 128 bytes)
16h  2 BYTEs   reserved
18h  4 BYTEs   reserved (00h)

Category: DOS Extenders - Int 31h - D

Interrups Categories Contents