INT 67 - RM386 v6.00 - GET RM386 GLOBAL FLAGS
        AX = 5BF4h
Return: AH = 00h
        BX = global flags 1 (see below)
        CX = global flags 2 (see below)
        DX = global flags 3 (see below)
        SI = global flags 4 (see below)
SeeAlso: AX=5BF0h

Bitfields for global flags 1:
 bits 0-3 reserved
 bit 4  V86 mode
 bit 5  reserved
 bit 6  80386 or higher CPU
 bits 7,8 reserved
 bit 9  A20 enabled at startup
 bit 10 "HIGH_IO"
 bit 11 ROM
 bit 12 large frame
 bits 13,14 reserved
 bit 15 PS/2-style A20 control

Bitfields for global flags 2:
 bit 0  HMA in use
 bit 1  XMS present
 bit 2  using XMS driver memory
 bit 3  HIGH (NEAT only)
 bits 4-7 reserved
 bit 8  NOBKTRAP
 bit 9  NORESET
 bit 10 ALTMAP
 bit 11 NOFRAME
 bits 12-15 reserved

Bitfields for global flags 3:
 bit 0  NOTEST
 bit 1  NOEBDA
 bit 2  Windows3 support
 bit 3  system board mouse
 bit 4  DISKBUF
 bit 5  EBDALOW
 bit 6  A20 global enable flag
 bit 7  A20 flag
 bit 8  EBDA moved to stub
 bit 9  VXD file was found
 bit 10 reserved
 bit 11 NOBOOTMAP
 bit 12 AUTO
 bit 13 PS/2 machine
 bit 14 Compaq ROM merge active
 bit 15 NOHMA set

Bitfields for global flags 4:
 bit 0  "NOV8259" don't virtualize interrupt controller
 bit 1  NOSCSI
 bit 2  NOSCAN
 bit 3  NOTR
 bit 4  ALTBOOT
 bit 5  NOCOMPQ
 bit 6  KB2TRAP
 bit 7  DESHADOW
 bit 8  Video 7 VGA detected
 bit 9  reserved
 bit 10 NOVGA
 bit 11 NOPS2
 bit 12 DEBUG
 bit 13 NOVKB
 bits 14,15 reserved

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