| 03 |
NMI is disabled.
To check soft reset/power on |
| 05 |
BIOS stack
set. Going to disable cache if any |
| 06 |
POST code
to be uncompressed |
| 07 |
CPU init
and CPU data area init to be done |
| 08 |
CMOS checksum
calculation to be done next |
| 0B |
Any initialization
before keyboard BAT to be done next |
| 0C |
Keyboard
controller I/B free. To issure the BAT command to the keyboard controller |
| 0E |
Any initialization
after keyboard controller BAT to be done next |
| 0F |
Keyboard
command byte written |
| 10 |
Going to
issue Pin 23, 24 blocking/unblocking command |
| 11 |
Going to
check pressing of <INS>, <END> key during power-on |
| 12 |
To init CMOS
if "Init CMOS in every boot" is set or <END> key
is pressed. Going to disable DMA and interrupt controllers |
| 13 |
Video display
is disabled and port B is initialized. Chipset init about to begin |
| 14 |
8254 timer
test about to start |
| 19 |
About to
start memory refresh test |
| 1A |
Memory refresh
line is toggling. Going to check 15 µs On/OFF time |
| 23 |
To read 8042
input port and disable megakey GreenPC feature. make BIOS cade segment
writeable |
| 24 |
To do any
setup before int vector init |
| 25 |
Interrupt
vector initialization to begin. To clear password if necessary |
| 27 |
Any initialization
before setting video mode to be done |
| 28 |
Going for
monochrome mode and color mode setting |
| 2A |
Different
buses init (system, static, output devices) to start if present |
| 2B |
To give control
for any setup required before optional ROM check |
| 2C |
To look for
optional video ROM and give control |
| 2D |
To give control
to do any processing after video ROM returns control |
| 2E |
If EGA/VGA
not found then do display memory R/W |
| 2F |
EGA/VGA not
found. Display memory R/W test about to begin |
| 30 |
Display memoryR/W
test passed. About to look for the retrace checking |
| 31 |
Display memory
R/W test or retrace checking failed. To do alternate Display memory
R/W test |
| 32 |
Alternate
Disaply memory R/W test passed. To look for the alternate display
retrace checking |
| 34 |
Video display
checking over. Display mode to be set next |
| 37 |
Display mode
set. Going to display the power on message |
| 38 |
Different
buses init (input, IPL, general devices) to start if present |
| 39 |
Display different
buses initialization error messages |
| 3A |
New cursor
position read and saved. To display the Hit <DEL> message |
| 40 |
tp prepare
the descriptor tables |
| 42 |
To enter
virtual mode for memory test |
| 43 |
To enable
interrupts for diagnostics mode |
| 44 |
To initialize
data to check memory wrap around at 0:0 |
| 45 |
Data initializaed.
Going to check for memory wrap around at 0:0 and finding the total
system test memory |
| 46 |
Memory wrap
around test done. Memory size calculation over. About to go for
writing patterns to test memory. |
| 47 |
Pattern to
be tested written in extended memory. Going to write patterns in
base 640KB memory |
| 48 |
Patterns
written in base memory. Going to find out amount of memory below
1M memory |
| 49 |
Amount of
memory below 1M found and verified. Going to find out amount of
memory above 1M memory |
| 4B |
Amount of
memory above 1M found and verified. Check for soft reset and going
to clear memory below 1M for soft reset. (If power on, go to check
point # 4E |
| 4C |
Memory below
1M cleared. (SOFT RESET) Going to clear memory above 1M |
| 4D |
memory above
1M cleared (SOFT RESET) Going to save the memory size (Go to checl
point # 52 |
| 4E |
Memory test
started. (NOT SOFT RESET) About to display the first 64KB memory
size |
| 4F |
Memory size
display started. this will be updated during memory test. going
for sequential and random memory test |
| 50 |
Memory testing/iniialization
below 1MB complete. Going to adjust displayed memory size for relocation
shadow |
| 51 |
Memory size
display adjusted due to relocation/shadow. memory test above 1MB
to follow |
| 52 |
Memory testing/initialization
above 1MB complete. Going to save memory size information |
| 53 |
Memory size
information is saved. CPU registers are saved. Going to enter real
mode |
| 54 |
Shutdown
successful, CPu in real mode. Going to disable gate A20 line and
disable parity/NMI |
| 57 |
A20 address
line, parity/NMI disable successful. Going to adjust memory size
depending on relocation/shadow |
| 58 |
Memory size
adjusted for relocation/shadow. Going to clear hit <DEL> message |
| 59 |
Hit <DEL>
message cleared. <WAIT...> message displayed. About to start
DMA and interrupt controller test |
| 60 |
DMA page
register test passed. To do DMA #1 base register test |
| 62 |
DMA #1 base
register test passed. To do DMA #2 base register test |
| 65 |
DMA #2 base
register test passed. To program DMA #1 and #2 |
| 66 |
DMA #1 and
#2 programming over. To initialize 8259 interrupt controller |
| 7F |
Extended
NMI sources enabling is in progress |
| 80 |
Keyboard
test started. Clearing output buffer, checking for stuck key, to
issue keyboard reset command |
| 81 |
Keyboard
reset error/stuck key found. To issue keyboard controller interface
test command |
| 82 |
Keyboard
controller interface test over. To write command byte and init circular
buffer |
| 83 |
Command byte
written, global data init done. To check for lock-key |
| 84 |
Lock key
checking over. to check for memory size mismatch with CMOS |
| 85 |
Memory size
check done. to display soft error and check for password or bypass
setup |
| 86 |
Passwoed
checked. About to do programming before setup |
| 87 |
Programming
before setup complete. To uncompress SETUP code and execute CMOS
setup |
| 88 |
Returned
from CMOS setup program and screen is cleared. About to do programming
after setup |
| 89 |
Programming
after setup complete. Going to display power-on screen message |
| 8B |
First screen
message displayed. <WAIT...> message displayed. PS/2 mouse
check and extended BIOS data area allocation to be done |
| 8C |
Setup options
programming after CMOS setup about to start |
| 8D |
Going to
hard disk controller reset |
| 8F |
Hard disk
controller reset done. Floppy setup to be done next |
| 91 |
Floppy setup
complete. Hard disk setup to be done next |
| 95 |
Init of different
buses optional ROMs from C800 to start. |
| 96 |
Going to
do any init before C800 optional ROM control |
| 97 |
Any init
before C800 optional ROM control is over. Optional ROM check and
control will be done next |
| 98 |
Optional
ROM control is done. About to give control to do any required processing
after optional ROM returns control and enable external cache |
| 99 |
Any initialization
required after optional ROM test over. Going to setup timer data
area and printer base address |
| 9A |
Return after
setting timer and printer base addresses. Going to set the RS-232
base address |
| 9B |
Returned
after RS-232 base address. Going to do any initialization before
coprocessor test |
| 9C |
Required
initialization before coprocessor is over. Going to initializae
the coprocessor test |
| 9D |
Coprocessor
initialized. Goin to do any initialization after coprocessor test |
| 9E |
Initialization
after coprocessor test is complete. Goin to check extended keyboard,
keyboard ID and num-lock |
| A2 |
Going to
display any soft errors |
| A3 |
Soft error
display complete. Going to set keyboard typematic rate |
| A4 |
Keyboard
typematic rate set. To program memory wait states |
| A5 |
Going to
enable parity/NMI |
| A7 |
NMI and parity
enabled. Going to do any initialization required before giving control
to optional ROM at E000 |
| A8 |
Initialization
before E000 ROM control over. E000 ROM to get control next |
| A9 |
Returned
from E000 ROM control. Going to do any initialization required after
E000 optional ROM control |
| AA |
Initialization
after E000 optional ROM control is over. Going to display the system
configuration |
| AB |
Put Int13
module runtime image to shadow |
| AC |
Generate
MP for multiprocessor support (if present) |
| AD |
Put CGA Int10
module (if present) in shadow |
| AE |
Uncompress
SMBIOS module and init SMBIOS code and form the runtime SMBIOS image
in shadow |
| B1 |
Going to
copy any code to specific area |
| 00 |
Copying of
code to specific area done. Going to give control to Int19 boot
loader |
