INT 67 - RM386 v6.00 - GET RM386 GLOBAL FLAGS AX = 5BF4h Return: AH = 00h BX = global flags 1 (see #03659) CX = global flags 2 (see #03660) DX = global flags 3 (see #03661) SI = global flags 4 (see #03662) SeeAlso: AX=5BF0h Bitfields for RM386 global flags 1: Bit(s) Description (Table 03659) 0-3 reserved 4 V86see Virtual-86 Mode mode 5 reserved 6 80386 or higher CPU(Central Processing Unit) The microprocessor which executes programs on your computer. 7,8 reserved 9 A20(Address line 20) The 80286 and higher CPUs allow addresses in real mode to extend slightly beyond the one megabyte mark, which causes an incompatibility with some older programs which expect such addresses to wrap back to the beginning of the address space. For complete compatibility with the 8088, newer machines thus contain circuitry which permits the twenty-first address line (A20) to be disabled. The CPU then effectively has only twenty address lines in real mode, just as the 8088 does, and addresses which would extend beyond the one megabyte mark wrap to the beginning of the address space. See also High Memory Area, Real Mode. enabled at startup 10 "HIGH_IO" 11 ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. 12 large frame 13,14 reserved 15 PSIBM PS/2, any model/2-style A20(Address line 20) The 80286 and higher CPUs allow addresses in real mode to extend slightly beyond the one megabyte mark, which causes an incompatibility with some older programs which expect such addresses to wrap back to the beginning of the address space. For complete compatibility with the 8088, newer machines thus contain circuitry which permits the twenty-first address line (A20) to be disabled. The CPU then effectively has only twenty address lines in real mode, just as the 8088 does, and addresses which would extend beyond the one megabyte mark wrap to the beginning of the address space. See also High Memory Area, Real Mode. control Bitfields for RM386 global flags 2: Bit(s) Description (Table 03660) 0 HMAsee High Memory Area in use 1 XMSsee Extended Memory Specification present 2 using XMSsee Extended Memory Specification driver memory 3 HIGH (NEAT only) 4-7 reserved 8 NOBKTRAP 9 NORESET 10 ALTMAP 11 NOFRAME 12-15 reserved Bitfields for RM386 global flags 3: Bit(s) Description (Table 03661) 0 NOTEST 1 NOEBDA 2 Windows3 support 3 system board mouse 4 DISKBUF 5 EBDALOW 6 A20(Address line 20) The 80286 and higher CPUs allow addresses in real mode to extend slightly beyond the one megabyte mark, which causes an incompatibility with some older programs which expect such addresses to wrap back to the beginning of the address space. For complete compatibility with the 8088, newer machines thus contain circuitry which permits the twenty-first address line (A20) to be disabled. The CPU then effectively has only twenty address lines in real mode, just as the 8088 does, and addresses which would extend beyond the one megabyte mark wrap to the beginning of the address space. See also High Memory Area, Real Mode. global enable flag 7 A20(Address line 20) The 80286 and higher CPUs allow addresses in real mode to extend slightly beyond the one megabyte mark, which causes an incompatibility with some older programs which expect such addresses to wrap back to the beginning of the address space. For complete compatibility with the 8088, newer machines thus contain circuitry which permits the twenty-first address line (A20) to be disabled. The CPU then effectively has only twenty address lines in real mode, just as the 8088 does, and addresses which would extend beyond the one megabyte mark wrap to the beginning of the address space. See also High Memory Area, Real Mode. flag 8 EBDA moved to stub 9 VXD file was found 10 reserved 11 NOBOOTMAP 12 AUTO 13 PS/2IBM PS/2, any model machine 14 Compaq ROM(Read-Only Memory) A memory for program storage which may not be changed by the program as it runs. merge active 15 NOHMA set Bitfields for RM386 global flags 4: Bit(s) Description (Table 03662) 0 "NOV8259" don't virtualize interrupt controller 1 NOSCSI 2 NOSCAN 3 NOTR 4 ALTBOOT 5 NOCOMPQ 6 KB2TRAP 7 DESHADOW 8 Video 7 VGAVideo Graphics Array(Video Graphics Array) The video adapter introduced with the IBMInternational Busiuness Machines PS/2IBM PS/2, any model series of computers. detected 9 reserved 10 NOVGA 11 NOPS2 12 DEBUG 13 NOVKB 14,15 reserved