Bull NovaScale 5000 Series, Руководство пользователя

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C-20
User’s Guide
IA–32
POST Codes
Meaning
0x008E Uncompress INT 13 module. If module not found, go to checkpoint 0x0093.
Update BIOS to INT 13 communication segment.
Build INT 13 module header.
Update communication between POST, Runtime, and INT 13.
Check whether to initialize floppy or not.
Next, checkpoint 0x0093.
0x0093 Test for SCSI boot. If yes SCSI boot, scan for option ROMs, activate ADM if
not already activated, initialize SCSI drive numbers in BIOS data area, and
continue on.
If no SCSI boot, pass control to INT 13 module initialization code.
Next, checkpoint 0x008F.
0x008F Initialize the floppy disk drive including initializing the global data area, set-
ting interrupt vectors, and sensing drive type and setting disk state accord-
ingly.
Initialize AFD variables. Check for valid CMOS.
Next, checkpoint 0x0091.
0x0091 Initialize ATA/ATAPI devices and associated variables.
Next, checkpoint 0x0092.
0x0092 Initialize I2O devices and associated variables, if enabled in Setup
(CMOS). Adjust AFD variables. Call DIM module to scan and initialize op-
tion ROM’s. See
DIM Code Checkpoints section of document for more in-
formation.
Return control from INT 13 module. Initialize IDE drives in BIOS data area.
Activate ADM if not already active.
Make F000 RAM write enabled (ALWAYS READ/WRITE).
Next, checkpoint 0x0096.
Note that there
will be 15–bit
post codes in
this area.
These indicate
Device Initiali-
zation Manager
sub–codes. The convention for the DIM POST codes is as follows:
Port 80 = 0x92
Port 81 = DIM Function number | DI number
0x0096 Call hook that is available to initialize option ROM’s if DIM code has not al-
ready initialized any.
Next, checkpoint 0x0097.
0x0097 Search for and give control to the option ROM’s if not already done by DIM
code.
Next, checkpoint 0x0098.
0x0098 Activate ADM if add–on ROM found (yes, again).
Disable USB host controller. Restoring INT10 vector.
Performing any required processing after the option ROM returned control.
If any ROM cleanup or OEM ROM work needed do it.
Next, checkpoint 99h.
0x0099 Check CMOS to verify correct time (no power failure).
Set to default if CMOS bad.
Set up printer base address.
Next, checkpoint 0x009A.