HP Kayak XU Technical Reference Manual page 74

5 Power-On Self-Test and Error Messages
Order in Which the Tests are Performed
Checkpoint
Code
81h Late POST device initialization
82h Detect and install external RS 232 ports
83h Configure non-MCD IDE controllers
84h Detect and install external parallel ports
85h Initialize PC-compatible PnP ISA devices
86h Re-initialize onboard I/O ports
87h Configure Motherboard 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
66
POST Routine Description