Acer G301, User Manual

Page: 136 / 162

Appendix A: AMIBIOS POST Checkpoint Codes
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0Eh The keyboard controller BAT command result has
been verified. Next, performing any necessary
initialization after the keyboard controller BAT
command test.
0Fh The initialization after the keyboard controller BAT
command test is done. The keyboard command
byte is written next.
10h The keyboard controller command byte is written.
Next, issuing the Pin 23 and 24 blocking and
unblocking command.
11h Next, checking if <End> or <Ins> keys were
pressed during power on. Initializing CMOS RAM if
the Initialize CMOS RAM in every boot AMIBIOS
POST option was set in AMIBCP or the
<End> key
was pressed.
12h Next, disabling DMA controllers 1 and 2 and
interrupt controllers 1 and 2.
13h The video display has been disabled. Port B has
been initialized. Next, initializing the chipset.
14h The 8254 timer test will begin next.
19h The 8254 timer test is over. Starting the memory
refresh test next.
1Ah The memory refresh line is toggling. Checking the
15 second on/off time
next.
23h Reading the 8042 input port and disabling the
MEGAKEY Green PC feature next. Making the BIOS
code segment writable and performing any
necessary configuration before initializing the
interrupt vectors.
24h The configuration required before interrupt vector
initialization has completed. Interrupt vector
initialization is about to begin.
Checkpoint Code Description
aa300.book Page 124 Tuesday, December 17, 2002 5:27 PM