System Test - Toshiba T3300SL Maintenance Manual

3.4

System Test

To execute the System Test, type 1 from the DIAGNOSTIC TEST MENU, press Enter, and follow
the directions displayed on the screen. Select the number corresponding to the subtest you want to
execute and press Enter.
Subtest 01 ROM checksum
This subtest tests the T3300SL's system board from address F0000h - FFFFFh (64KB).
Subtest 02 HW status
NOTE: Select No for the Test Loop prompt when selecting this subtest. Also, the pro-
gram runs for several minutes before returning you to the subtest menu.
This subtest reads and displays the T3300SL's hardware status as shown below.
H/W status =
Bit7 —
Bit6 — CPU clock
Bit5 — Notch signal
Bit4 — FDD type
Bit3 —
Bit2 — Drive A/B
Bit1 — External FDD
Bit0 — Internal FDD
Table 3-2 describes the hardware bit status for each bit tested. Pressing Enter returns
you to the subtest menu.
76543210
10001000
Table 3-2 T3300SL hardware bit status
Bit HW status
7 Reserved
6 CPU clock speed
5 Media type
4 FDD type
3 Reserved
2 Drive A/B
1 External FDD
0 Internal FDD
=
= 25MHZ
= 2HD
= 2MB
=
= Ext. = B
= OFF
= 2HD
1 0
-- --
6MHz 25MHz
2DD 2HD
1MB 2MB
-- --
A B
ON OFF
2DD 2HD
3-11