Compaq Deskpro 4000N Technical Reference Manual page 69

Configuration Byte 0Eh, Diagnostic Status
Default Value = 00h
This byte contains diagnostic status data.
Configuration Byte 0Fh, System Reset Code
Default Value = 00h
This byte contains the system reset code.
Configuration Byte 10h, Diskette Drive Type
Bit Function
7..4 Primary (Drive A) Diskette Drive Type
3..0 Secondary (Drive B) Diskette Drive Type
Valid values for bits <7..4> and bits <3..0>:
0000 = Not installed
0001 = 360-KB drive
0010 = 1.2-MB drive
0011 = 720-KB drive
0100 = 1.44-MB/1.25-MB drive
0110 = 2.88-MB drive
(all other values reserved)
Configuration Byte 12h, Hard Drive Type
Bit Function
7..4 Primary Controller 1, Hard Drive 1 Type:
0000 = none
0001 = Type 1
0010 = Type 2
0011 = Type 3
0100 = Type 4
0101 = Type 5
0110 = Type 6
0111 = Type 7
3..0 Primary Controller 1, Hard Drive 2 Type:
0000 = none
0001 = Type 1
0010 = Type 2
0011 = Type 3
0100 = Type 4
0101 = Type 5
0110 = Type 6
0111 = Type 7
1000 = Type 8
1001 = Type 9
1010 = Type 10
1011 = Type 11
1100 = Type 12
1101 = Type 13
1110 = Type 14
1111 = other (use bytes 19h)
1000 = Type 8
1001 = Type 9
1010 = Type 10
1011 = Type 11
1100 = Type 12
1101 = Type 13
1110 = Type 14
1111 = other (use bytes 1Ah)
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition - September1997
Technical Reference Guide
4-27