Compaq 850 manual Configuration Byte 0Eh, Diagnostic Status

Chapter 4 System Support

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	1000 = Type 8
	0001	= Type 1	1001	= Type 9
	0010	= Type 2	1010	= Type 10
	0011	= Type 3	1011	= Type 11
	0100	= Type 4	1100	= Type 12
	0101	= Type 5	1101	= Type 13
	0110	= Type 6	1110	= Type 14
	0111	= Type 7	1111	= other (use bytes 19h)
3..0	Primary Controller 1, Hard Drive 2 Type:
	0000	= none	1000 = Type 8
	0001	= Type 1	1001	= Type 9
	0010	= Type 2	1010	= Type 10
	0011	= Type 3	1011	= Type 11
	0100	= Type 4	1100	= Type 12
	0101	= Type 5	1101	= Type 13
	0110	= Type 6	1110	= Type 14
	0111	= Type 7	1111	= other (use bytes 1Ah)

4-24Compaq Deskpro EXS and Workstation 300 Personal Computers Featuring the Intel Pentium 4 Processor

First Edition - December 2000