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Bus checkpoint codes – Acer Altos G300 Series User Manual

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131

Bus Checkpoint Codes

The system BIOS passes control to different buses at the following
checkpoints:

A8h

Initialization before passing control to the adaptor
ROM at E000h completed. Passing control to the
adaptor ROM at E000h next.

A9h

Returned from adaptor ROM at E000h control.
Performing any initialization required after the
E000 option ROM had control next.

Aah

Initialization after E000 option ROM control has
completed. Displaying the system configuration
next.

Abh

Uncompressing the DMI data and executing DMI
POST initialization next.

B0h

The system configuration is displayed.

B1h

Copying any code to specific areas.

00h

Code copying to specific areas is done. Passing
control to INT 19h boot loader next.

Checkpoint Code

Description

2Ah

Initializing the different bus system, static, and
output devices, if present.

38h

Initialized bus input, IPL, and general devices, if
present.

39h

Displaying bus initialization error messages, if any.

95h

Initializing bus adaptor ROMs from C8000h
through D8000h.

Checkpoint Code

Description

aa300.book Page 131 Tuesday, December 17, 2002 5:27 PM

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