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SLCT ' (Select)
Generated on LSI chip ME25 pin 40.
Indicates the status of the
Select latch within the chip. This latch is set either by receiving a
select code (octal 021) or by pressing the SELECT switch on the operator
panel when the printer is deselected. The flip-flop is reset either by
receiving a deselect code (octal 023) or by pressing the SELECT switch
when the printer is selected. The select and deselect codes affect the
select latch even when the printer is busy.
(BELL) Bell
Generated on LSI chip ME25 pin 39. BELL is a 0.8 - 1.6 KHz sig-
nal of 1 to
2
second duration
t
generated by either a received bell code
(octal 007) or a paper empty condition.
cscr
(Cause Line Feed)
Generated on LSI chip ME25 pin 6. Any of the following input con-
ditions will cause CSLF to go active (low):
1. Receiving a Line Feed code {octal 012} on input data lines
DS1-DS7.
If the DSC option is used {jumper E10 to Ell}, the
complete line of characters will be printed before CSLf goes
low.
2. Pressing the optional Line Feed switch on the operator panel.
CSLF goes back high at the start of the Delayed Line Feed pulse (DLYLF).
PMSOL (Paper Movement Solenoid)
Generated on LSI chip ME25 pin 7. Any paper movement command (i.e.,
line feed, form feed or vertical tab). The low PMSOL output activates a
driver circuit on the Power Driver board, which in turn activates the paper
movement solenoid on the form feed unit. This causes paper to advance in
the printer.
4-39
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