Toshiba T-Series T3300sl, Maintenance Manual

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