Acer Altos G520 Altos G520 User's Guide - Page 169

Acer Altos G520 Manual

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Check point 3B 3C 40 50 52 60 75 159 Diagnostic LED Decoder G=Green, R=Red, A+Amber Description MSB LSB G OFF R A Test for total memory installed in the system. Also, check for DEL or ESC keys to limit memory test. Display total memory in the system. G G R R Mid POST initialization of chipset registers. OFF R OFF OFF Detect different devices (Parallel ports, serial ports, and coprocessor in CPU...etc). successfully installed in the system and update the BDA, EBDA...etc. OFF R OFF R Programming the memory hole or any kind of implementation that needs an adjustment in system RAM size if needed. OFF R G R Updates CMOS memory size from memory found in memory test. Allocates memory for Extended BIOS Data Area from base memory. OFF R R OFF Initializes NUM-LOCK status and programs the KBD typematic rate. OFF A R A Initialize Int-13 and prepare for IPL detection.

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159
3B
G
OFF
R
A
Test for total memory
installed in the system.
Also, check for DEL or ESC
keys to limit memory test.
Display total memory in
the system.
3C
G
G
R
R
Mid POST initialization of
chipset registers.
40
OFF
R
OFF
OFF
Detect different devices
(Parallel ports, serial ports,
and coprocessor in
CPU...etc). successfully
installed in the system and
update the BDA,
EBDA...etc.
50
OFF
R
OFF
R
Programming the memory
hole or any kind of
implementation that
needs an adjustment in
system RAM size if
needed.
52
OFF
R
G
R
Updates CMOS memory
size from memory found
in memory test. Allocates
memory for Extended
BIOS Data Area from base
memory.
60
OFF
R
R
OFF
Initializes NUM-LOCK
status and programs the
KBD typematic rate.
75
OFF
A
R
A
Initialize Int-13 and
prepare for IPL detection.
Check
point
Diagnostic LED Decoder
Description
G=Green, R=Red, A+Amber
MSB
LSB