Table F-2. Printing enabled/disabled
signals and control conditions
On-Line
(Indicator on)
SLCT IN
DC1/DC3
(Data on/off contr.)
ERROR
BUSY
ACKNLG
Printing
(Disabled/enabled)
ON-LINE
ON-LINE
ON-LINE
OFF-LINE
LOW
DC1/DC3
(interface)
(no effect)
HIGH
DC1 RECV’D
HIGH
DC3 RECV’D
HIGH/LOW
DC1 /DC3
(no effect)
(no effect)
HIGH
HIGH
HIGH
LOW
HIGH/LOW
ENABLED
PULSED EA. CHAR. (normal cond.)
HIGH/LOW
PULSED EA. CHAR. ENABLED
HIGH/LOW
PULSED EA. CHAR. *DISABLED
HIGH
NOT GENERATED
DISABLED
*Even though printing is disabled, data characters are received and acknowledged, since the printer is looking for another DC1 character,
which would allow it to resume printing.