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Tests and Subtests
Subtest 1 determines which computer will begin transmitting.
Subtes.ts 2 and 3 , , respectively, transmit and receive data packets
through the fast communication port.
first transmission is four words long.
transmission, the packet size doubles.
until the packets reach a word count of 32,768 (215 ).
and 5, respectively, transmit and receive blocks of memory.,
subtests 4 and 5, you must specify the start address in memory
and the number of words to transfer.
before the transmit subtests to avoid transmitting data before it
can be accepted.
Errors
Test 14 can return the following errors:
Timeout on package receive complete.
d words left to transfer.
Received data invalid.
words.
No read status changes received.
Invalid status while waiting for read complete,, polling
returned d.
Unknown synch down data received: x.
Fast comm line has uninterrupted carrier.
Carrier signal doesn't come on after clock disabled.
Timeout waiting for carrier to go after disabling clock.
Transmit underrun error on transfer.
Terminal count not received after read end of message.
Erroneous read status returned = x.
Loss of carrier before completion of RS-422 operation.
Counter = d.
No carrier loss after terminal count on transmit.
Test Output
FAST COMMUNICATION PORT TEST
The packet size for the
For each subsequent
Transmissions continue
Start the receive subtests
Packet size = d.
Got d, expected d, transfering d
Subtests 4
For
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