IPOXUSA IP-M45A1, Руководство пользователя

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BIOS
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While control is in the different functions, additional checkpoints are output
to port 80h as a word value to identify the routines under execution. The
low byte value indicates the main POST Code Checkpoint. The high byte is
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of these checkpoints are as follows:
HIGH BYTE XY
The upper nibble “X” indicates the function number that is being executed.
“X” can be from 0 to 7.
0 = func#0, disable all devices on the BUS concerned.
2 = func#2, output device initialization on the BUS concerned.
3 = func#3, input device initialization on the BUS concerned.
4 = func#4, IPL device initialization on the BUS concerned.
5 = func#5, general device initialization on the BUS concerned.
6 = func#6, error reporting for the BUS concerned.
7 = func#7, add-on ROM initialization for all BUSes.
8 = func#8, BBS ROM initialization for all BUSes.
The lower nibble 'Y' indicates the BUS on which the different routines are
being executed. 'Y' can be from 0 to 5.
0 = Generic DIM (Device Initialization Manager).
1 = On-board System devices.
2 = ISA devices.
3 = EISA devices.
4 = ISA PnP devices.
5 = PCI devices.