System Test - Toshiba T3400 Maintenance Manual

3.4

System Test

To execute the System Test, select 1 from the DIAGNOSTIC TESTS menu, press Enter and
follow the directions displayed on the screen. Move the highlight bar to a subtest and press
Enter.
Subtest 01 ROM checksum
ROM checksum tests the system board from address F0000h to FFFFFh
(64KB).
Subtest 02 H/W status
This test reads and displays hardware status as shown below:
H/W status = 10001000
Bit7 —
Bit6 — CPU clock
Bit5 — Notch signal
Bit4 — FDD type
Bit3 —
Bit2 — Drive A/B
Bit1 — External FDD
Bit0 — Internal FDD
Table 3-2 lists hardware bit status for each bit tested. Press Enter to return to
the Subtest Menu.
Bit
7 Reserved
6 CPU clock speed
5 Media type
4 FDD type
3 Reserved
2 Drive A/B
1 External FDD
0 Internal FDD
3-8
76543210
Table 3-2 Hardware Bit Status
H/W status
=
= 33MHz
= 2HD
= 2MB
=
= Ext. = B
= OFF
= 2HD
1
—
16.5 MHz
2DD
1.6 MB
—
Ext. = A
ON
2DD
0
—
33 MHz
2HD
2 MB
—
Ext. = B
OFF
2HD
T3400, T3400CT