HP Vectra VT 6/xxx HP Vectra XU 6/xxx and VT 6/xxx PCs - Technical Reference M - Page 37

System Memory Map, Product Identification, Bios Version Number

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SYSTEM MEMORY MAP 00000h - 9FFFFh A0000h - BFFFFh C0000h - C7FFFh C8000h - EFFFFh C8000h - D3FFFh E0000h - EFFFFh F0000h - FFFFFh 100000h - FFFFFFFFh 640 KB--DOS Application Area 128 KB--Video Buffer 32 KB--Video BIOS 160 KB--ISA Expansion Memory SCSI BIOS Boot ROM 64 KB--System BIOS 1 MB plus--Extended Memory NOTE Reserved memory used by accessory boards must be located in the area from C8000h to EFFFFh. PRODUCT IDENTIFICATION The following product identification strings are located in the 64 KB BIOS ROM data area. Location 0F000:00F2h 0F000:00F3h 0F000:00F4h 0F000:00F5h 0F000:00F8h 0F000:00FAh 0F000:00FCh 0F000:00FEh 0F000:00FFh 0F000:0102h Size byte byte byte byte word byte word byte byte word Contents 4Dh 5Bh 14h speed (in MHz) 08h 4646h FFh ppssh yyh nnh 4850h Description System number for HP Vectra XU 6/xxx PC System number for HP Vectra VT 6/xxx PC Extended identification byte (14h = Pentium Pro) High processor clock frequency Low processor clock frequency HP Vectra PC ID (ASCII "FF") Product Identification BIOS version number pp = primary number ss = secondary number ROM release year (since 1960) Week of the year stored in BCD Computer ID (ASCII "HP") BIOS VERSION NUMBER 0F000:00FCh = BIOS version number Length = two bytes Encoding is as follows: ppss where pp = Primary version number and ss = Secondary version number For HP Vectra XU 6/xxx PC, all BIOS releases have GG as the prefix and 06 as the primary version number. For HP Vectra VT 6/xxx PC, all BIOS releases have GV as the prefix and 06 as the primary version number.

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SYSTEM MEMORY MAP
00000h - 9FFFFh
640 KB--DOS Application Area
A0000h - BFFFFh
128 KB--Video Buffer
C0000h - C7FFFh
32 KB--Video BIOS
C8000h - EFFFFh
160 KB--ISA Expansion Memory
C8000h - D3FFFh
SCSI BIOS
E0000h - EFFFFh
Boot ROM
F0000h - FFFFFh
64 KB--System BIOS
100000h - FFFFFFFFh
1 MB plus--Extended Memory
NOTE
Reserved memory used by accessory boards must be
located in the area from C8000h to EFFFFh.
PRODUCT IDENTIFICATION
The following product identification strings are located in the 64 KB BIOS ROM data area.
Location
Size
Contents
Description
0F000:00F2h
byte
4Dh
System number for
HP Vectra XU 6/xxx PC
5Bh
System number for
HP Vectra VT 6/xxx PC
0F000:00F3h
byte
14h
Extended identification byte
(14h = Pentium Pro)
0F000:00F4h
byte
speed
(in MHz)
High processor clock frequency
0F000:00F5h
byte
08h
Low processor clock frequency
0F000:00F8h
word
4646h
HP Vectra PC ID (ASCII “FF”)
0F000:00FAh
byte
FFh
Product Identification
0F000:00FCh
word
pp
ssh
BIOS version number
pp
= primary number
ss
= secondary number
0F000:00FEh
byte
yy
h
ROM release year (since 1960)
0F000:00FFh
byte
nn
h
Week of the year stored in BCD
0F000:0102h
word
4850h
Computer ID (ASCII “HP”)
BIOS VERSION NUMBER
0F000:00FCh = BIOS version number
Length = two bytes
Encoding is as follows:
pp
ss
where
pp
= Primary version number and
ss
= Secondary version number
For
HP Vectra XU 6/xxx PC
, all BIOS releases have GG as the prefix and 06 as the primary
version number. For
HP Vectra VT 6/xxx PC
, all BIOS releases have GV as the prefix and 06 as
the primary version number.