System Test - Toshiba T4900CT 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 = 10001000
Bit7 —
Bit6 — CPU clock
Bit5 — Notch signal
Bit4 — FDD type
Bit3 —
Bit2 —
Bit1 —
Bit0 — Internal FDD = 2HD
Table 3-2 describes the hardware bit status for each bit tested. Pressing Enter
returns you to the Sub-Test Menu.
Bit H/W status
7 Reserved
6 CPU clock speed
5 Notch signal
4 FDD type
3 Reserved
2 Reserved
1 Reserved
0 Internal FDD
T4900CT
76543210
=
= 75MHz
= 2HD
= 2MB
=
=
=
Table 3-2 Hardware bit status
1
—
75MHz
2DD
1.6 MB
—
—
—
2DD
0
—
75MHz
2HD
2 MB
—
—
—
2HD
3-7