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correctly.
The subtests are
1.
Check the line printer status register and print the
observed status.
2.
Print a rotating pattern on the printer using
interrupts.
Subtest 1 checks the status of the data/status register, returns
the status, and makes sure that the status is valid (either line
printer present, line printer selected, or line printer out of
paper).
For each repetition, subtest 2 prints one full page of
wallpaper patterns, consisting of 132-column rotations of the
ASCII character set.
Errors
Test 13 can return the following errors:
Unrecognized LP status x.
Test Output
Output for a run of the line printer test is as follows:
LINE PRINTER TEST
LINE PRINTER SUBTEST 1, Status Test.
LP Selected.
LINE PRINTER SUBTEST 2, Transfer Test.
At this point in the test, the line printer prints a full page of
rotations of the ASCII character set.
TEST 14:
FAST COMMUNICATION (RS-422) PORT TEST (k)
Test 14 verifies the fast communication (RS-422) port.
subtests 16 and 17 of the disk tests, test 14 requires two
computers:
one to transmit data and the second to receive it.
The computer receiving data should be ready to receive data
before the transmission subtest starts.
1.
Auto send/receive.
2.
Transmit increasing sized packets.
3.
Receive the packets sent by subtest 2.
4.
Transmit user specified block of memory.
5.
Receive user specified block of memory.
Check the status on each interrupt.
Tests and Subtests
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The subtests are 1 2 3 4 5
2-21
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