User-Selected Tests; Selecting A Test - Zenith Z-100 Reference Manual

User-Selected Tests

In addition to the automatic checks, you may select test sequences from a menu
to check the following devices and parameters:
Disk drives
Keyboard
Memory
Power-Up status
These tests will produce a display that shows you the test name, number of passes
made, and keyboard key sequence required to manually end the test. If an error
is encountered, the test will end and an error message will be displayed.
Unlike the power-up memory test, which only tests the first and last 64K banks
of RAM, the memory test selected here checks all the user RAM plus the 16
kilobytes of video screen RAM.

Selecting a Test

Tests may be performed by entering TEST at the system prompt arrow (->).
The following menu will appear on the screen:
Now you can select one of the desired test sequences by number. The main
advantage of testing in this fashion is that these sequences will run continuously
until you stop them or an error is encountered. These routines are extremely
useful if a malfunction is intermittent, time dependent, or a result of heat buildup.
An onscreen count is displayed to keep track of the number of times the particular
test has run. The possible error messages are the same as those described under
Power-Up Checks.
System Operating Features
CHOOSE ONE OF THE FOLLOWING:
1. DISK READ TEST
2. KEYBOARD TEST
3. MEMORY TEST
4. POWER-UP TEST
5. EXIT
ENTER YOUR CH O ICE:
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