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POST
DESCRIPTION
CODE
CF
Initialization after Keyboard controller BAT to be done. Keyboard command
byte to be written next.
D1
Keyboard controller command byte is written. Going to check pressing of
<INS> key during power-on.
D2
Checking for pressing of <INS> key during power-on done. Going to disable
DMA and Interrupt controllers.
D3
DMA controllers 1 and 2 and interrupt controllers 1 and 2 disabled. Chipset
initialization and auto memory detection about to begin.
D4
Chipset initialization and auto memory detection over. To uncompress the
RUNTIME code.
D5
RUNTIME code is uncompressed.
DD
Transfer control to uncompressed code in shadow RAM at F000:FFF0.
************************************************************************
*
Runtime code is uncompressed in F000 shadow RAM
************************************************************************
03
NMI is disabled. To check soft reset and power-on.
05
Soft reset and power-on determined. Going to disable Cache if any.
06
POST code to be uncompressed.
07
POST code is uncompressed. CPU initialization and CPU data area
initialization to be done next.
08
CPU and CPU data area initialization done. CMOS checksum calculation to be
done next.
09
The CMOS checksum calculation is done and the CMOS RAM Diagnostic byte
written. CMOS RAM inititialization is next if the Initialize CMOS RAM At
Every Boot option is set.
0A
CMOS RAM initialization done (if any). The CMOS RAM status register will
be initialized for Date and Time next.
0B
The CMOS RAM status register initialization done. Any initialization before
Keyboard BAT test to be done next.
0C
The Keyboard controller I/B is free. Issuing the BAT command to the Keyboard
controller next.
0D
BAT command to Keyboard controller is issued. Going to verify the BAT
command.
0E
The Keyboard controller BAT result has been verified. Any initialization after
the Keyboard controller BAT command to be done next.
0F
Initialization after the Keyboard controller BAT command is done. The
Keyboard command byte will be written next.
Post Codes & Error Codes
F-2
*
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