Category: BIOS
INT 15 - SYSTEM - COPY EXTENDED MEMORY AH = 87h CX = number of words to copy (max 8000h) ES:SI -> global descriptor table (see #00499) Return: CF set on error CF clear if successful AH = status (see #00498) Notes: copy is done in protected mode with interrupts disabled by the default BIOS handler; many 386 memory managers perform the copy with interrupts enabled on the PS/2 30-286 & "Tortuga" this function does not use the port 92h for A20 control, but instead uses the keyboard controller (8042). Reportedly this may cause the system to crash when access to the 8042 is disabled in password server mode (see also PORT 0064h,#P0398) this function is incompatible with the OS/2 compatibility box SeeAlso: AH=88h,AH=89h,INT 1F/AH=90h