Compaq Deskpro 4000 Technical Reference Manual page 82

Hp deskpro 4000: reference guide
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Chapter 4 System Support
Configuration Byte 45h, Keyboard Snoop Data
Default Value = xxh
Bit
Function
7
Cntrl/F10 Key Status:
0 = Cntrl & F10 keys not pressed
1 = Cntrl & F10 keys pressed
6
F10 Key Status:
0 = F10 key not pressed
1 = F10 key pressed
5..1
Reserved
0
Key Pressed Flag:
0 = Key not pressed
1 = Key pressed
Configuration Byte 46h, Diskette/Hard Drive Status
Default Value = xxh
Bit
Function
7,6
Reserved
5
Partition On HD:
0 = Not set, 1 = Set
4
Setup Disk:
0 = Not present, 1 = Present
3
ROMPAQ or DIAGS Diskette:
0 = Not present, 1 = Present
2
Boot Diskette in Drive A:
0 = No, 1 = Yes
1
Drive B: Present:
0 = Not present, 1 = Present
0
Drive A: Present:
0 = Not present, 1 = Present
Configuration Bytes 47h-4Fh, IPL Data
These bytes hold initial program load (IPL) data for boot purposes:
Byte 47h, last IPL device
Bytes 48h-4Bh, IPL priority
Byte 4Ch-4Fh, BCV priority
Configuration Byte 51h, ECC Status Byte
Default Value = xxh
Bit
Function
7
ECC Status for DIMM 3
6
ECC Status for DIMM 2
5
ECC Status for DIMM 1
4
ECC Status for DIMM 0
3..0
Reserved
4-36
Compaq Deskpro 4000 and 6000 Personal Computers
featuring the Pentium II Processor
First Edition - October 1997

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