Parallel Port Status Signals When An Error Occurs; Compatible Timing Specification - Tally Dascom 7010 Series Maintenance Manual

2-4. Interface

(3) Parallel port status signals when an error occurs

The following table shows the status signal change when an error occurs.
Paper end
Error other than paper end
• Head open
• Other
Conditions for Busy

(4) Compatible timing specification

[When power is on] (Timing to go on-line)
Reset
BUSY
ACK
SELECT
Error
Busy:
PError:
Select:
Fault:
Busy:
PError:
Select:
Fault:
• Receive buffer full
• Data being read
• Error
Compatible mode
L → H
L → H
H → L
H → L
L → H
L → unchanged
H → L
H → L
Power On
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