TYAN Tiger K8W S2875 User Manual page 70

1Ah 8237 DMA controller
initialization
1Ch Reset Programmable Interrupt
Controller
20h 1-3-1-1. Test DRAM refresh
22h 1-3-1-3. Test 8742 KBD
Controller
24h Set ES segment register to 4
GB
26h Enable A20 line
28h Autosize DRAM
29h Initialize POST Memory
Manager
2Ah Clear 512 KB base RAM
2Ch 1-3-4-1. RAM failure on
address
2Eh 1-3-4-3. RAM failure on data
bits of low byte of memory bus
2Fh Enable cache before system
BIOS shadow
30h 1-4-1-1. RAM failure on data
bits of high byte of memory bus
Code Beeps / Description
6Ah Display external L2 cache size
6Bh Load custom defaults (optional)
6Ch Display shadow -area message
6Eh Display possible high address
for UMB recovery
70h Display error messages
72h Check for configuration errors
76h Check for keyboard errors
7Ch Set up hardware interrupt
vectors
7Eh Initialize coprocessor if present
80h Disable onboard Super I/O
ports and IRQs
81h Late POST device initialization
82h Detect and install external
RS232 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 Motherboard Devices
88h Initialize BIOS Data Area
89h Enable Non-Maskable
Interrupts (NMIs)
8Ah Initialize Extended BIOS Data
Area
8Bh Test and initialize PS/2 mouse
8Ch Initialize floppy controller
8Fh Determine number of ATA
54h
58h
59h
5Ah
5Bh
5Ch
60h
62h
64h
66h
67h
68h
69h
Code
A2h
A4h
A8h
AAh
ACh
AEh
B0h
B2h
B4h
B5h
B6h
B9h
BAh
BBh
BCh
BDh
BEh
BFh
C0h
C1h
C2h
C3h
C4h
70
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Set key click if enabled
2-2-3-1. Test for unexpected
interrupts
Initialize POST display service
Display prompt "Press F2 to
enter SETUP"
Disable CPU cache
Test RAM between 512 and
640 KB
Test extended memory
Test extended memory address
lines
Jump to UserPatch1
Configure advanced cache
registers
Initialize Multi Processor APIC
Enable external and CPU
caches
Setup System Management
Mode (SMM) area
Beeps / Description
Check key lock
Initialize Typematic rate
Erase F2 prompt
Scan for F2 key stroke
Enter SETUP
Clear Boot flag
Check for errors
POST done - prepare to boot
operating system
One short beep before boot
Terminate QuietBoot (optional)
Check password (optional)
Prepare Boot
Initialize DMI parameters
Initialize PnP Option ROMs
Clear parity checkers
Display MultiBoot menu
Clear screen (optional)
Check virus and backup
reminders
Try to boot with INT 19
Initialize POST Error Manager
(PEM)
Initialize error logging
Initialize error display function
Initialize system error handler