HP 8711C, User Manual, Page: 316 / 530

The parallel port has Eve TTL input signals, normally used for determining
the printer’s status, which can be read. The signals and the corresponding
data bits and pins are shown in the following table:
Pin Bit
10
11 01
12
13
15 04
Name
Acknowledge
Out of Paper
On tine
Printer Error
Automating Measurements
Controlling Peripherals
Your custom interface circuit can drive these signals,
using any of these commands:
SCPI commands:
OUTPUT
ENTER
command:
Parallel-in
and they can be read
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