FIC A360 用户手册

 

Troubleshooting and Repair 

2-1-1 

2-1-2 

2-1-3 

2-1-4 

2-2-1 

2-2-2 

2-2-3 

2-2-4 

2-3-1 

2-3-2 

2-3-3 

2-3-4 

2-4-1 

2-4-2 

2-4-3 

2-4-4 

10h-1Fh 

First 64K RAM chip or data 
line failure on bit x 

The first 64K of RAM is tested with a 
rolling ones test and a pattern test. If any 
of the rolling ones tests fail, then the 
BIOS reports the specific bit that failed. 
To determine the bit number from the 
diagnostic code, subtract 10h. For 
example, if 12h is displayed at the 
diagnostic port, bit 2 failed. Failure 
results in a system halt. 

3-3-1 20h 

Slave DMA register test in 
progress or failure. 

Pattern test of channels 1 through 3 of 
the slave controller (starting port address 
= 02h). Failure results in a system halt. 

3-1-2 21h 

Master DMA register test in 
progress or failure. 

Pattern test of channels 1 through 3 of 
the master DMA controller (starting port 
address = C4h). Failure results in a 
system halt. 

3-1-3 22h 

Master interrupt mask register 
test in progress or failure. 

Rolling ones and zeros tests of the mask 
register of the master programmable 
interrupt controller (port 21h). Failure 
results in a system halt.  

3-1-4 23h 

Slave interrupt mask register 
test in progress or failure. 

Rolling ones and zeros tests of the mask 
register of the master programmable 
interrupt controller (port A1h). Failure 
results in a system halt.  

none 25h 

Interrupt vector loading in 
progress. 

No specific test is performed - just 
indicates that the Interrupt Vector table is 
being initialized. 

3-2-4 27h 

Keyboard controller test in 
progress or failure. 

The self-test command (AAh) is issued to 
the 8042 (keyboard controller) and the 
results are monitored. Failure results in a 
system halt. 

None 28h CMOS RAM power failure 

and checksum calculation 
test in progress. 

The power-fail bit in CMOS RAM is 
tested and the lower CMOS RAM area is 
being checksummed. A failure does not 
result in system halt. 

None 29h CMOS RAM configuration 

validation for video in 
progress. 

No specific test is performed - just 
indicates that the configuration specified 
in CMOS for video is being matched 
against the actual installation. A failure 
does not result in a system halt. 

 

6-6 

FIC A360 Service Manual