Toshiba T4900CT - Page 35

2-18
T4900CT
Table 2-3 Printer port LED error status (1/2)
Error status Test item Message
00H Boot block test —
01H Check system —
02H PIT test —
03H DRAM size check —
04H SM-RAM ready for stack —
05H CMOS check complete —
06H System BIOS copy —
(ROM to RAM) complete
07H Display control finish —
09H Check finished —
0AH First 64KB memory test FIRST 64KB MEMORY ERROR
0CH System initialize
0DH Interrupt vector —
initialization
18H PIC initialization —
1FH Display initialization CRTC ERROR
VRAM ERROR
READ DATA = XXXXXXXXH
WRITE DATA = XXXXXXXXH
25H System memory test SYSTEM MEMORY ERROR
ADDRESS = XXXXXXXXH
READ DATA = XXXXXXXXH
WRITE DATA = XXXXXXXXH
SYSTEM MEMORY PARITY ERROR
ADDRESS = XXXX0000H - XXXXFFFFH
30H Extended memory test EXTENDED MEMORY ERROR
ADDRESS = XXXXXXXXH
READ DATA = XXXXXXXXH
WRITE DATA = XXXXXXXXH
EXTENDED MEMORY PARITY ERROR
ADDRESS = XXXX0000H - XXXXFFFFH
40H DMA page register test DMA PAGE REGISTER ERROR
READ DATA = XXH
WRITE DATA = XXH