Test Code Error Messages; Test 1 Errors; Test 2 Errors; Test 3 Through 6 Errors - Digital Equipment Micro PDP-11/53 Supplement Manual

MicroPDP-ll/53 BASE SYSTEM
For more information about automatic boot mode and console mode,
see the KDJII-DA CPU Module User's Guide (EK-KDJID-UG).
3.4 TEST CODE ERROR MESSAGES
3.4.1 Test 1 Errors
When started, the ROM code runs a series of tests that verify the
basic Memory Management Unit (MMU) operation and the ROM code. At
this point in the testing sequence, the comprehensive error
message display routines are disabled. If an error occurs during
test 1, the ROM code displays the following error message.
KDJII-D/S 1.00
This message indicates that a fatal error condition occurred. The
ROM code ignores any keyboard input, except to display the error
message each time input is received.
3.4.2
Test 2 Errors
This test checks the console SLU. When the SLUO test is running,
the ROM code assumes that error messages cannot be displayed.
Therefore, if an error occurs, the ROM code loops on the error.
3.4.3 Test 3 through 6 Errors
These are the main CPU and memory tests. These are also the tests
continuously looped when you use the Test command. If an error is
detected during these tests, the ROM code displays a brief error
message. All errors are treated as fatal errors. The user is
expected to fix the problem before continuing. However, errors can
be bypassed for troubleshooting.
3.4.4 Override Errors
To bypass an error, you must type one of two commands when the
error message is displayed. The ROM code displays the KDJII-D/S
prompt and waits for input. Table 3-6 lists the error override
commands and results.
Table 3-6 Error Override Commands
Command Results
<CTRL/O>4<RETURN>
Overrides error and enters console mode.
L<RETURN> Restarts
tests at test 2. Loops through tests
ignoring errors. Type <CTRL/C> to exit loop.
--------------------~------------
CAUTION
System media should either be removed or write protected before
you bypass an error.
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