Radio Shack TRS-80 Model II Reference Manual page 122

Model II TRSDOS
MEMTEST
MEMTEST
This utility tests the random access memory in the Model II. You may select either a
full memory test
(X'OOOO'
to end) or a user memory test
(X'3000'
to top of user
memory).
To execute the test, type under
TRSDOS READY:
MEMTEST (ENTER)
Note:
After running the full memory test, you must reset the system. After running
the user memory test, control returns to
TRSDOS READY.
All user memory is
cleared. None of the high-memory routines may be active while
MEMTEST
is
running. (The
STATUS
command will tell you if any are active.)
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