HelpPC 2.10 Quick Reference Utility Copyright 1991 David Jurgens

            INT 67,5B - Alternate Map Register Set  (LIM EMS 4.0+)

       AH = 5B
       AL = 00  get alternate map register set
            01  set alternate map register set
                BL = new alternate map register set number
                ES:DI = pointer to map register context save area if BL=0
            02  get alternate map save array size
            03  allocate alternate map register set
            04  deallocate alternate map register set
                BL = number of alternate map register set
            05  allocate DMA register set
            06  enable DMA on alternate map register set
                BL = DMA register set number
                DL = DMA channel number
            07  disable DMA on alternate map register set
                BL = DMA register set number
            08  deallocate DMA register set
                BL = DMA register set number

       on return:
       AH = status  (see EMS STATUS)
       BL = active alternate map register set number if nonzero (AL=0)
          = number of alternate map register set; 0 if not supported (AL=3)
          = DMA register set number; zero if not supported (AL = 05)
       DX = array size in bytes (AL = 02)
       ES:DI = pointer to a map register context save area if BL=0 (AL=0)


       - for use by operating systems only; can be enabled or disabled
         at any time by the operating system

Esc or Alt-X to exit int 67,5b Home/PgUp/PgDn/End ←↑↓→