System Test - Toshiba T4500 User Manual

3.4

System Test

To execute the System Test, select 1 from the DIAGNOSTIC TEST MENU, press Enter and
follow the directions displayed on the screen. Move the highlight bar to the subtest you want to
execute and press Enter.
Subtest 01 ROM checksum
The ROM checksum tests the system board from address F0000h to FFFFFh
(64KB).
Subtest 02 H/W status
This test reads and displays the hardware status as shown below:
H/W status =
Table 3-2 describes the hardware bit status for each bit tested. Pressing Enter
returns you to the Sub-Test Menu.
Bit
7 Reserved
6 CPU clock speed
(T4600/T4600C)
(T4500/T4500C)
5 Media type
4 FDD type
3 Reserved
2 Drive A/B
1 External FDD
76543210
10001000
Bit7 —
Bit6 — CPU clock
Bit5 — Notch signal = 2HD
Bit4 — FDD type
Bit3 —
Bit2 — Drive A/B
Bit1 — External FDD = OFF
Bit0 — Internal FDD = 2HD
Table 3-2 Hardware Bit Status
H/W status
=
= xxMHz
= 2MB
=
= Ext. = B
1
—
17 MHz
10 MHz
2DD
1.6 MB
—
Ext. = A
ON
0
—
33 MHz
20 MHz
2HD
2 MB
—
Ext. = B
OFF
3-7