HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

                INT 15,87 - Move Block to/from Extended Memory

       AH = 87h
       CX = word count of block to be moved
       ES:SI = pointer to Global Descriptor Table (GDT)

       on return:
       CF = 0  if successful (AH contains return code)
          = 1  if error detected
       AH = 0  operation successful (ZF also set)
          = 1  RAM parity error  (if CF set)
          = 2  other exception (if CF set)
          = 3  gate address on line 20h failed (if CF set)
          = 80h on PC and PCjr (if CF set)
          = 86h on XT and newer 808x machines (if CF set)

       - transfers data blocks to and from extended memory on 80286
         and 80386 machines by switching from real to protected mode
         for the duration of the transfer
       - all real mode interrupts are disabled
       - processor shuts down during the switch from protected mode
         to real mode on 286 processors

Esc or Alt-X to exit int 15,87 Home/PgUp/PgDn/End ←↑↓→
Converted to HTML in 2006 by Timo Bingmann