INT 15 - SYSTEM - COPY EXTENDED MEMORY
AH = 87h
CX = number of words to copy (max 8000h)
ES:SI -> global descriptor table
Return: CF set on error
CF clear if successful
AH = status
00h source copied into destination
01h parity error
02h interrupt error
03h address line 20 gating failed
80h invalid command (PC,PCjr)
86h unsupported function (XT,PS30)
Notes:  copy is done in protected mode with interrupts disabled
this function is incompatible with the OS/2 compatibility box
SeeAlso: AH=89h

Format of global descriptor table:
Offset  Size    Description
00h 16 BYTEs   zeros
10h    WORD    source segment length in bytes (2*CX-1 or greater)
12h  3 BYTEs   24-bit linear source address, low byte first
15h    BYTE    source segment access rights (93h)
16h    WORD    zero
18h    WORD    destination segment length in bytes (2*CX-1 or greater)
1Ah  3 BYTEs   24-bit linear destination address, low byte first
1Dh    BYTE    destination segment access rights (93h)
1Eh 18 BYTEs   zeros

See also: 1588

1587 - SYSTEM - COPY EXTENDED MEMORY