DEC DECstation 5000 Model 100 Series, Maintenance Manual

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Serial Line Single Silo Test
The serial line single silo test checks the serial line controller’s
ability to fill and empty the silo. To run this test, type t f43 P1
P2 and press Return.
Serial line single silo test error messages
Table F-6 describes the parameters in serial line single silo test
commands and error messages.
Table F-7 describes the error codes found in serial line single
silo error messages.
Table F-6. Serial Line Silo Alarm Test Parameters
Parameter Description
P1 Specifies the test’s loopback setting. Specify 0 for internal
loopback; specify 1 for external loopback.
P2 Specifies the serial line to be tested.
Specify 0 to test the keyboard.
Specify 1 to test the mouse.
Specify 2 to test the right communications line.
Specify 3 to test the left communications line.
P3 Actual value in register named in the subtest.
P4 Expected value in register named in the subtest.
P5 Baud rate written to the serial line printer.
Table F-7. Serial Line Single Silo Test Error Codes
Error Code Meaning
1 Single silo test failed.
2 Timeout occurred while waiting for transmit ready (trdy).
3 Error occurred while checking for correct line in serial line
current status register (CSR).
4 Timeout occurred while waiting for correct line and trdy in
CSR.
5 RBUF- dval + line + received character.
Test Commands and Messages Produced by Version PDE3 ROM Chips F–7