| 01 |
Disable
the NMI and test CPU registers |
| 02 |
Verify
the BIOS ROM checksum (32KB at F8000h) |
| 03 |
Initialize
the keyboard controller and CMOS RAM communication |
| 04 |
Disable
the DMA and PIT; test the CMOS RAM interrupt |
| 05 |
Reset
the video controller |
| 06 |
Test
the 8254 programmable interrupt timer |
| 07 |
Test
delta count timer channel 2 (speaker) |
| 08 |
Test
delta count timer channel 1 (memory refresh) |
| 09 |
Test
delta count timer channel 0 (system timer) |
| 0A |
Test
parity circuit and turn on refresh |
| 0B |
Enable
parity check and test system timer |
| 0C |
Test
refresh trace link toggle |
| 0D |
Test
refresh timing synchronization |
| 10 |
Disable
cache and shadow memory; test the 64KB base memory |
| 11 |
Perform
64KB memory read/write test |
| 12 |
Initialize
interrupt vector table in lower 1KB of RAM |
| 14 |
Test
CMOS RAM shutdown register...disable DMA and interrupt controllers |
| 15 |
Test
CMOS RAM battery and checksum |
| 16 |
Test
for floppy drive, based on CMOS setup...initialize monochrome
video |
| 17 |
Initialize
CGA video |
| 18 |
Clear
the parity status (if any) |
| 19 |
Test
for EGA/VGA video BIOS at C0000h and pass control |
| 1A |
Return
from video ROM |
| 1B |
Test
primary video adapter...test video memory |
| 1C |
Test
secondary video adapter...test video memory |
| 1D |
Compare
CMOS settings to video adapter |
| 1E |
Set
video mode according to CMOS settings |
| 20 |
Display
CMOS RAM read/write errors and halt |
| 21 |
Set
cursor and call interrupt 10 to display status message |
| 22 |
Display
power on message; "386 BIOS"; check if CPU speed is 25Mhz
or 33Mhz |
| 23 |
Read
new cursor position |
| 24 |
Display
AMI copyright message at the bottom of the screen |
| 25 |
Test
shadow RAM |
| F0 |
Shadow
RAM test failed |
| 30 |
Ready
to enter protected mode |
| 31 |
Enter
protected mode (A20 gate) and enable timer interrupt (IRQ
0) |
| 32 |
Get
memory size above 1MB |
| 33 |
Get
memory size below 640KB |
| 34 |
Test
memory above 1MB |
| 35 |
Test
memory below 1MB |
| 37 |
Clear
memory below 1MB |
| 38 |
Clear
memory above 1MB |
| 39 |
Use
CMOS shutdown byte and return to real mode |
| 3A |
Test
64KB read/write |
| 3B |
Test
RAM below 1MB and show the area being tested |
| 3C |
Test
RAM above 1MB and show the area being tested |
| 3D |
RAM
test complete OK |
| 3E |
Ready
to return to real mode |
| 3F |
Back
in real mode |
| 40 |
Disable
A20 gate |
| 41 |
Check
for AMI copyright message in ROM |
| 42 |
Display
the AMI copyright message, if found |
| 43 |
Test
cache memory; Clear <Esc> message |
| 4E |
Process
shutdown 1; Return to real mode |
| 4F |
Restore
interrupt vectors and data in BIOS RAM area |
| 50 |
Test
DMA controller |
| 51 |
Initialize
DMA controller |
| 52 |
Test
the DMA controller with patterns |
| 54 |
Test
DMA controller latches |
| 55 |
Initialize
and enable DMA controllers 1 and 2 |
| 56 |
Initialize
8259 programmable interrupt controllers |
| 57 |
Test
8259 programmable interrupt controllers and setup interrupt
mask registers |
| 61 |
Check
DDNIL status bit and display message |
| 70 |
Perform
keyboard (BAT) basic assurance test |
| 71 |
Program
keyboard to AT type |
| 72 |
Disable
keyboard and initialize keyboard circular buffer |
| 73 |
Display
message and initialize floppy controller and drive |
| 74 |
Attempt
to access the floppy drive |
| 75 |
If
the CMOS RAM is good, check and initialize the hard disk controller
and drive |
| 76 |
Attempt
to access the hard disk drive |
| 77 |
Shuffle
and internal error codes |
| 79 |
Check
CMOS RAM battery and checksum...clear parity status |
| 7A |
Compare
size of base/extended memory to CMOS information |
| 7B |
Unknown
AMI function |
| 7C |
Display
AMI copyright |
| 7D |
Set
AT memory expansion bit |
| 7E |
Verify
the ROM contains and AMI copyright |
| 7F |
Clear
the <Del> message from the display...check if <Del>
was pressed |
| 80 |
Locate
option ROM at C800h to DE00h and pass control to any found |
| 81 |
Return
from option ROM and initialize timer and data area |
| 82 |
Setup
parallel and serial ports |
| 83 |
Test
for math coprocessor |
| 84 |
Check
if keyboard is locked |
| 85 |
Display
any soft error messages |
| 86 |
Test
for option ROM at E0000h |
| A0 |
Error
found in 256KB or 1MB RAM IC in lower 640KB |
| A1 |
Base
64KB random access and data pattern test (only in 386APR and
Presto 386SX BIOS) |
| A9 |
Initialize
on board VGA controller (Presto 386SX BIOS) |
| B0 |
Error
in 256KB RAM IC in 640KB |
| B1 |
Base
64KB random access and data pattern test (only in Presto 386SX
BIOS) |
| E0 |
Return
to real mode and initialize base 64KB RAM (Presto) |
| E1 |
Initialize
640KB RAM (Presto) |
| EF |
Configuration
memory error - can't find memory |
| F0 |
Test
shadow RAM from 04000h |
| 00 |
Call
the interrupt 19 boot loader |
