Acer Altos G301 Acer Altos G301 User's Guide - Page 133
AMIBIOS POST Checkpoint Codes
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121 AMIBIOS POST Checkpoint Codes Uncompressed Initialization Codes The uncompressed initialization checkpoint codes are listed in order of execution: Checkpoint Code Description D0h The NMI is disabled. Power on delay is starting. Next, the initialization code checksum will be verified. D1h Initializing the DMA controller, performing the keyboard controller BAT test, starting memory refresh, and entering 4 GB flat mode next. D3h Starting memory sizing next. D4h Returning to real mode. Executing any OEM patches and setting the stack next. D5h Passing control to the uncompressed code in shadow RAM at E000:0000h. The initialization code is copied to segment 0 and control will be transferred to segment 0. D6h Control is in segment 0. Next, checking if was pressed and verifying the system BIOS checksum. If either was pressed or the system BIOS checksum is bad, next will go to checkpoint code E0h. Otherwise, going to checkpoint code D7h.
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