AT&T PC 6300 - 600-Parallel Port Tests

DIAGNOSTICS
600—Parallel Port Tests
The 600 series tests are the Parallel Port Tests. The error
messages for this series of tests are listed below;
6x1 The data path check to the Parallel Port failed.
6x2 The command port test failed (only on System Test).
6x3 The status port test failed (only on System Test).
6x4 The Parallel Port interrupt circuit failed (only on
System Test). . '
Note: X = 0,1, 2, and 3 for the four possible ports.
A Hexadecimal status byte may also be displayed to aid in fault
isolation. The meanings of the status bits are shown below.
PRINTER STATUS BYTE
Bit 7 = 1 Not Busy
Bit 6 = 1
Not Busy
Bit 5 = 1
Out of Paper
Bit 4 = 1
Selected
Bit 3 = 1
I/O Error
Bit 2 = 1
Not Used
Bit 1 = 1
Not Used
Bit 0 = 1
Time Out
4-144
0
0
il
n
n
n
n
n
n
n
n
n
n
n
n
n
n