TYAN S2875, User Manual

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Appendix II: BIOS POST Code
Code Beeps / Description Code Beeps / Description
02h Verify Real Mode 32h Test CPU bus-clock frequency
03h Disable Non- Maskable Interrupt
(NMI) 33h Initialize Phoenix Dispatch
Manager
04h Get CPU type 36h Warm start shut down
06h Initialize system hardware 38h Shadow system BIOS ROM
08h Initialize chipset with initial
POST values
3Ah Autosize cache
09h Set IN POST flag 3Ch Advanced configuration of
chipset registers
0Ah Initialize CPU registers 3Dh Load alternate registers with
CMOS values
0Bh Enable CPU cache 42h Initialize interrupt vectors
0Ch Initialize caches to initial POST
values 45h POST device initialization
0Eh Initialize I/O component 46h 2-1-2-3. Check ROM copyright
notice
0Fh Initialize the local bus IDE 48h Check video configuration
against CMOS
10h Initialize Power Management 49h Initialize PCI bus and devices
11h Load alternate registers with
initial POST values 4Ah Initialize all video adapters in
system
12h Restore CPU control word
during warm boot 4Bh QuietBoot start (optional)
13h Initialize PCI Bus Mastering
devices 4Ch Shadow video BIOS ROM
14h Initialize keyboard controller 4Eh Display BIOS copyright notice
16h 1-2-2-3. BIOS ROM checksum 50h Display CPU type and speed
17h Initialize cache before memory
autosize 51h Initialize EISA board
18h 8254 timer initialization 52h Test keyboard