122
6 Tests and Error Messages
Order in Which POST Tests Are Performed
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
8Ch
Initialize floppy controller
8Fh
Determine number of ATA drives (optional)
90h
Initialize hard disk controllers
91h
Initialize local-bus hard disk controllers
92h
Jump to UsersPatch2
93h
Build MPTABLE for multi-processor boards
95h
Install CD ROM for boot
96h
Clear huge ES segment register
97h
Fix up Multi Processor table
98h
1-2
Search for option ROMs. One long, two short beeps on checksum failure.
99h
Check for SMART drive
9Ah
Shadow option ROMs
9Ch
Set up Power Management
9Dh
Initialize security engine (optional)
9Eh
Enable hardware interrupts
Checkpoint
Code
Beeps
POST Routine Description