AT&T PC 6300 - Page 274

DIAGNOSTICS
The parallel loopback jumper is a male 25-pin connector that fits
into the parallel port on the rear panel of the System Module. The
loopback jumper is wired as follows (Figure 4-2):
Pin
1 (-STROBE)
to
Pin 13 (SELECT)
Pin
2 (PTDO)
to
Pin 15 (-ERROR)
Pin 10 (-ACK)
to
Pin 16 (-INIT)
Pin
11 (BUSY)
to
Pin 18 (GND)
Pin
12 (PE)
to
Pin 14 (-AUTOFDX)
n
n
n
0^0 o
(DqqOCDOOOOO
^ 17 18 19 80 21 22 23
OOOOOOQd)
4 5 6 7 8 9 1
1 11 12 1
Figure 4-2. Parallel Loopback Jumper
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•0
n
0
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n
n
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