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SECTION
..
Memory. Floppy Drive and Winchester Driye Tests
4.0
64K MEMORY TEST PROGRAM
The memory of the 8-bit IMS system is normally found in 64K units.
There is
one memory board used in the CP/M operating system.
The multi-user operatlng
system can have up to 17 64K memory units distubuted between all the users.
The program tests an area of memory bounded by the top of the test program and
the bottom of the operating system.
These bounds are displayed when the
program signs on.
To start the program, type TESTMEMR
<Ct>.
The following display wul
appear.
TSTMEMR
Memory test utility
Rev
1,X
Beginning address •••
Ending address •.
05A9
Dxxx
The program will then run through 6 subtests.
The terminal will display the
current status of the test by printing dots on the screen.
The six subtests are:
1.
High bit test.
This will write an FFH pattern to the memory
locations.
This will test for a data bit shorted to low.
2.
Low bit test.
This will write a 00 pattern to the memory locations.
This will test for a data bit shorted to high level.
3.
Checkerboard bit test
1,
This routine will write a 55H pattern
(0 101
a
101) to the memory locations.
This will test for a short
between data bi ts.
4.
Checkerboard bit test 2.
This routine will write an AAH pattern
(1010
1010) to the memory locations.
This will test for a short
between data bits.
5.
Walking bit right test.
This routine will write a changing pattern
to the memory locations.
This pattern starts as
(lOaD
0000), then
(0100
0000), then (0010
0000), and so on.
The high bit walks
from left to right.
ThiS pattern continues to all the tested
locations.
6.
Walking bit left test.
This routine is similar to test 5 except that
the high bit moves from right to left.
IMS International
5000 Series Microcomputers!7.01,83/page 106
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