B
POST 80 codes
51
First BIOS notebook (Pro) checkpoint codes
Checkpoint Code Description
01h
IPMI Initialization.
02h
Verifies that CPU is in real mode from cold start.
03h
Disables NMIs.
04h
Gets CPU type from CPU registers.
06h
Miscellaneous hardware initialization.
07h
Disables system ROM shadow and start to execute from the flash device.
08h
Initializes chipset registers to power-on defaults.
09h
Sets In-POST bit in CMOS.
0Ah
Completes any implementation-specific CPU initialization.
0Bh
Enables L1 cache during POST.
0Ch
Initializes cache(s).
0Fh
Disables IDE operation.
11h
Alternates register initialization.
12h
Restores contents of CR0 following CPU reset
13h
Resets PCI devices in early post.
14h
Initializes and configures the keyboard controller.
16h
Verifies ROM BIOS checksum.
17h
Initializes external cache before memory auto size.
18h
Initializes the timers.
1Ah
Tests the DMA registers.
1Ch
Initializes interrupt controllers for some shutdowns.
20h
Verifies DRAM refresh.
22h
Initializes the Keyboard Controller for Keyboard Test.
24h
Sets 4GB segments for DS,ES,FS,GS,SS.
28h
Sizes DRAM.
29h
Initializes the POST Memory Manager.
2Ah
Zeroes the RAM up to the minimum RAM specified in the chipset RAM table.
2Ch
Tests address lines of the RAM.
2Eh
Tests the first 4MB of RAM.
2Fh
Initializes external cache before shadowing.
32h
Computes CPU clock speed in MHz.
33h
Initializes the Phoenix Dispatch Manager.
34h
Tests the CMOS RAM and RTC (S2D)
36h
Vector to the proper shutdown routine.
38h
Shadows system BIOS ROM.
3Ah
Auto sizes the external cache.
3Ch
Advanced chipset configuration.
3Dh
Alternates register configuration.
42h
Initializes interrupt vectors.
45h
POST device initialization.
46h
Verifies that the copyright message is intact.
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from
Downloaded from