Table 17.

POST Code - Port 80h Codes

 

(continued)

 

 

Diagnostic LED Decoder

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:

G=Green, R=Red,

 

 

 

 

Post

 

A=Amber

 

 

 

 

 

 

Code

 

MSB

 

 

 

LSB

 

 

Description

 

 

 

 

 

 

 

 

 

 

A2h

R

 

Off

A

 

Off

 

Report

second set of POST errors to error messenger.

 

 

 

 

 

 

 

 

 

 

86h

 

R

G

G

 

Off

 

 

Prepare And Run Setup: error manager displays and logs POST

 

 

 

 

errors. Waits for user input for certain errors. Execute setup.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

8Bh

 

A

Off

G

 

G

 

Set base expansion memory size.

 

 

 

 

 

 

 

 

 

 

8Ch

 

A

G

Off

 

Off

 

Adjust Setup: programming the Setup options next.

 

 

 

 

 

 

 

 

 

 

A5h

 

R

G

R

 

G

 

Set display mode.

 

 

 

 

 

 

 

 

 

 

A7h

 

R

G

A

 

G

 

OEM Patch 12.

 

 

 

 

 

 

 

 

 

 

A7h

 

R

G

A

 

G

 

Build SMBIOS table and MP tables.

 

 

 

 

 

 

 

 

 

 

A7h

 

R

G

A

 

G

 

Program hot key and timeout settings in keyboard controller.

 

 

 

 

 

 

 

 

 

 

A7h

 

R

G

A

 

G

 

Processor initialization before boot.

 

 

 

 

 

 

 

 

 

 

A7h

 

R

G

A

 

G

 

Copy required language strings to shadow RAM.

 

 

 

 

 

 

 

 

 

 

AAh

A

 

Off

A

 

Off

 

Clear video screen.

 

 

 

 

 

 

 

 

 

 

000h

Off

Off

Off

 

Off

 

One beep to indicate end of POST. No beep if silent boot is enabled.

 

 

 

 

 

 

 

 

 

000h

Off

Off

Off

 

Off

 

POST completed. Passing control to INT 19h boot loader next.

 

 

 

 

 

 

 

 

 

 

102

xSeries 343 Hardware Maintenance Manual

Page 114
Image 114
IBM 343 manual A2h Off