104

 

 

 

 

6 Technical Reference

 

 

 

 

 

 

 

 

Diagnostic LED Decoder

 

 

Post

 

 

 

 

 

 

G=Green,R=Red,A=Amber

Description

 

Code

 

 

 

 

 

 

 

 

MSB

 

 

LSB

 

 

 

 

 

 

 

 

 

4Bh

G

R

G

G

Memory Test: The amount of

 

 

 

 

 

memory above 8 MB has been

 

 

 

 

 

found and verified. Checking for

 

 

 

 

 

a soft reset and clearing the

 

 

 

 

 

memory below 8 MB for the soft

 

 

 

 

 

reset next. If this is a power-on

 

 

 

 

 

situation, going to checkpoint

 

 

 

 

 

4Eh next.

 

 

 

 

 

 

 

57h

Off

A

G

A

Chipset hook after memory size.

 

 

 

 

 

 

 

53h

Off

R

A

A

Display processor cache size.

 

 

 

 

 

 

 

54h

Off

A

Off

R

Disable parity and nmi

 

 

 

 

 

reporting.

 

 

 

 

 

 

 

60h

Off

R

R

Off

Test 8237 DMA Controller: The

 

 

 

 

 

DMA page register test passed.

 

 

 

 

 

Performing the DMA Controller

 

 

 

 

 

1 base register test next.

 

 

 

 

 

 

 

65h

Off

A

R

G

Init 8237 DMA Controller: The

 

 

 

 

 

DMA controller 2 base register

 

 

 

 

 

test passed. Programming DMA

 

 

 

 

 

controllers 1 and 2 next.

 

 

 

 

 

 

 

7Fh

G

A

A

A

Extended NMI enable: Extended

 

 

 

 

 

NMI source enabling is in

 

 

 

 

 

progress.

 

 

 

 

 

 

 

80h

R

Off

Off

Off

Enable Mouse and Keyboard:

 

 

 

 

 

The keyboard test has started.

 

 

 

 

 

Clearing the output buffer and

 

 

 

 

 

checking for stuck keys. Issuing

 

 

 

 

 

the keyboard reset command

 

 

 

 

 

next.

 

 

 

 

 

 

 

Page 114
Image 114
Acer R700 manual 104