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Technical Reference Guide
Compaq Deskpro EN Series of Personal Computers
Desktop and Minitower Form Factors
Third Edition - September 1998
4-41
Configuration Byte 83h, Microprocessor Identification
This byte holds the component ID and chip revision of the microprocessor.
Configuration Byte 84h, Microprocessor Revision
Configuration Byte 85h, Administration Mode
Bit Function
7,6 Reserved
5 ESCD Buffering:
0 = No buffering, 1 = ESCD buffered at F000h.
4 Hood Lock Enable:
0 = Disabled, 1 = Enabled
3 User Mode Flag
2 Administration Mode Flag
1 Level Support:
0 = Level 1, 1 = Level 2
0 Feature Support Bit
0 = Disabled, 1 = Enabled
Configuration Byte 86h, Fast Boot Date
Configuration Byte 87h, Fast Boot Select
Bit Function
7..3
2
1
0
Configuration Byte 88h, Fast Boot Date (Year/Century)
Configuration Byte 89h, APM Resume Timer
Bit <7> indicates the timer status: 0 = disabled, 1 = timer set.
Configuration Byte 8Ah-8Fh, APM Resume Timer
These bytes hold the APM timer values:
Byte 8Ah, minutes
Byte 8Bh, hours
Byte 8Ch, day
Byte 8Dh, month
Byte 8Eh, year
Byte 8Fh, century