Tests And Error Messages
Order In Which POSTs Occur
Chapter 4
89
76h Check for keyboard errors Keyboard Test
7Ch Set up hardware interrupt vectors
7Eh Initialize coprocessor if present
80h Disable onboard super I/O ports and IRQs
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 system board configurable devices
(optional)
88h Initialize BIOS data area
89h Enable Non-Maskable Interrupts (NMIs)
8Ah Initialize extended BIOS data area
8Bh Test and initialize PS/2 Mouse PS2 Test
8Ch Initialize floppy controller
8Fh Determine number of ATA drives (optional)
90h Initialize hard disk controllers Disc Ctrl. Init.
91h Initialize local-bus hard disk controllers Disc Bus Init.
92h Jump to UsersPatch2 Maxilife Test
93h Build MPTABLE for multiprocessor boards
95h Install CD-ROM for boot CDROM Ctr. Init.
96h Clear huge ES segment register
97h Fix multiprocessor table
98h Search for option ROMs Opt. Rom Detect.
99h Check for SMART drive
9Ah Shadow option ROMs
9Ch Set up power management
9Dh Initialize security engine (optional)
9Eh Enable hardware interrupts
Table 4-4 POST Checkpoint Codes (Continued)
Checkpoint
Code
POST Routine Description
MaxiLife LCD
Display Message
Beep
Codes
