Chapter 5
125
Tests and Error Messages
Order in Which the Tests Are Performed
84h
Detect and install external parallel ports
85h
Initialize Personal Workstation compatible PnP ISA devices
86h
Re-initialize onboard I/O ports
87h
Configure System Board Configurable Devices
88h
Initialize BIOS Data Area
89h
Enable Non-Maskable Interrupts (NMIs)
8Ah
Initialize Extended BIOS Data Area
8Bh
Test and initialize PS/2
8Ch
Initialize floppy controller
8Fh
Determine number of ATA drives
90h
Initialize hard disk controllers
91h
Initialize local-bus hard disk controllers
92h
Jump to UsersPatch2
93h
Build MPTABLE for multi-processor boards
94h
Disable A20 address line (Rel. 5.1 and earlier)
95h
Install CD ROM for boot
96h
Clear huge ES segment register
97h
Fixup Multi Processor table
99h
Check for SMART drive
9Ah
Shadow option ROMs
9Ch
Set up Power Management
9Eh
Enable hardware interrupts
9Fh
Determine number of ATA and SCSI drives
A0h
Set time of day
A2h
Check key lock
Checkpoint Code
POST Routine Description
Summary of Contents for X Class 500/550MHz
Page 6: ...6 Contents ...
Page 8: ...8 Figures ...
Page 15: ...15 1 System Overview ...
Page 66: ...66 Chapter2 System Board Devices on the ISA Bus ...
Page 96: ...96 Chapter3 Interface Boards and Mass Storage Drivers Connectors and Sockets ...
Page 134: ...134 Chapter5 Tests and Error Messages Beep Codes ...
Page 135: ...135 A Regulatory Information and Warranty ...
Page 146: ...146 AppendixA Regulatory Information and Warranty HP Hardware Warranty ...