Toshiba T3300SL Maintenance Manual page 33

Printer Port
Error
LED Indication
Codes
A B
*01h
02h
*03h
*04h
*05h
06h
*07h
08h
*09h
10h
11h
12h
13h
14h
15h
*16h
17h
18h
*19h
*20h
21h
*22h
*23h
*24h
25h
= On
= Off
Table 2-2 Printer port LED error codes
Test Item
CPU self test check
SL microprocessor test
CPU register test
ROM checksum test
PIT test
PIT initialization
PIT's function check
Initialization of the memory
configuration
First 64K memory test
Particular H/W initialization
Vector table initialization
RTC test
RTC initialization
PIC initialization
Display initialization
KBC test
System memory test
Extended memory test
DMA page register test
DMAC test
DMAC initialization
PIC test
SCC initialization
KBC initialization
Mouse initialization
Contents of the Test
Checks the result of the CPU self test.
386SL/82360SL initialization
Write/read test of the register in the CPU, Flag test
Checks the ROM checksum.
Checks if the counter value of channel 0 in the PIT changes or
not.
Initializes channels 0, 1, and 2 in the PIT.
Checks if the refresh status of the port 61h changes or not.
Checks if the output status of the port 61h's channel 2.
Checks and sets the memory configuration.
First 64KB memory write/read test
Parity error check
Sets the display device.
CMOS check, ROM, RAM copy
Connects/disconnects the MPDS.
Initializes the vector table.
This test is not performed here, but in test No. 10.
Checks the bad battery status and bad checksum status.
Initializes the control registers A and B.
Initializes the PIC #1 and #2.
Checks if the system has MDA and CGA or not, and then
initializes them.
Initializes the extended display I/O (C0003h call).
VRAM test of the MDA, CGA, and extended display I/O.
KBC initialization (AAh) command
D1h command (parameter 03)
60h command (parameter 54)
Write/read test of the system memory
Parity error check
Extended memory write/read test
Parity error check
Write/read test of channels 2, 3, 1, 0, 6, 7, and 5 in the DMA
page register
Write/read test of the DMAC #1 and #2
Initializes the DMAC #1 and #2, and DMA page register.
Write/read test of PIC mask register #1 and #2
SCC initialization (FFh) command
ADh command
D1h command (parameter 01)
66h command (parameter 55)
F2h command
AEh command
Mouse initialization (FFh) command
A7h command
2-17