Intel AN430TX - Motherboard - ATX Technical Product Specification page 74

AN430TX Motherboard Technical Product Specification
Table 44. Port 80h Codes (continued)
Code Description of POST Operation Currently In Progress
38h Shadow system BIOS ROM
39h Reinitialize the cache (MB only)
3Ah Autosize cache
3Ch Configure advanced chipset registers
3Dh Load alternate registers with CMOS values
40h Set Initial CPU speed new
42h Initialize interrupt vectors
44h Initialize BIOS interrupts
45h POST device initialization
46h Check ROM copyright notice
47h Initialize manager for PCI Option ROMs
(Rel. 5.1 and earlier)
48h Check video configuration against CMOS
49h Initialize PCI bus and devices
4Ah Initialize all video adapters in system
4Bh Display QuietBoot screen
4Ch Shadow video BIOS ROM
4Eh Display BIOS copyright notice
50h Display CPU type and speed
51h Initialize EISA board
52h Test keyboard
54h Set key click if enabled
56h Enable keyboard
58h Test for unexpected interrupts
59h Initialize POST display service
5Ah Display prompt "Press F2 to enter SETUP"
5Bh Disable CPU cache
5Ch Test RAM between 512 and 640 KB
60h Test extended memory
62h Test extended memory address lines
64h Jump to UserPatch1
66h Configure advanced cache registers
67h Initialize Multi Processor APIC
68h Enable external and CPU caches
69h Setup System Management Mode (SMM) area
6Ah Display external L2 cache size
6Ch Display shadow-area message
6Eh Display possible high address for UMB recovery
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