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 boards from address F0000h to FFFFFh
(64KB).
Subtest 02 H/W status
This test reads and displays the hardware status as shown below:
76543210
H/W status = 10001000
Bit7 — =
Bit6 — CPU clock = 20MHz
Bit5 — Notch signal = 2HD
Bit4 — FDD type = 2MB
Bit3 — =
Bit2 — Drive A/B = Ext. = B
Bit1 — External FDD = OFF
Bit0 — Internal FDD = 2HD
Table 3-2 describes the hardware bit status for each bit tested. Pressing Enter
returns you to the subtest menu.
Table 3-2 Hardware Bit Status
Bit H/W Status 1 0
7 Reserved — —
6 CPU clock speed 20 MHz 20 MHz
5 Media type 2DD 2HD
4 FDD type 1.6 MB 2 MB
3 Reserved — —
2 Drive A/B Ext. = A Ext. = B
1 External FDD ON OFF
0 Internal FDD 2DD 2HD
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