Tests And Error Messages
Order In Which POSTs Occur
Chapter 4
88
46h Check ROM copyright notice
48h Check video configuration against CMOS
49h Initialize PCI bus and devices PCI Detection 5
4Ah Initialize all video adapters in system Video Detection 4
4Bh Display QuietBoot screen (optional)
4Ch Shadow video BIOS ROM
4Eh Display BIOS copyright notice
50h Display CPU type and speed
51h Initialize EISA board
52h Test keyboard Keyboard Test
54h Set key click if enabled
56h Enable keyboard
58h Test for unexpected interrupts Unexpect. STOP
59h Initialize POST display service
5Ah Display prompt press F2 to enter Setup
5Bh Disable CPU cache
5Ch Test RAM between 512KB and 640KB Base Memory Test
60h Test extended memory Ext. Memory Data
62h Test extended memory address lines Ext. Memory Add.
64h Jump to UserPatch1
66h Configure advanced cache registers
67h Initialize multiprocessor APIC
68h Enable external and CPU caches
69h Setup System Management Mode (SMM)
area
6Ah Display external Level 2 cache size
6Ch Display shadow-area message
6Eh Display possible high address for UMB
recovery
70h Display error messages
72h Check for configuration errors
Table 4-4 POST Checkpoint Codes (Continued)
Checkpoint
Code
POST Routine Description
MaxiLife LCD
Display Message
Beep
Codes
