Thefollowingdescribesthepinoutoftheparallel(Centronics-type)inter-
faceconnector(signalswhich arelow whenactive areoverlined):
Pin Name Function
1ISTROBE Goes fIomhigh to low (for 20.51.M)whenactive I

I2IDATAO IHi~hwhenactive I

~DATA1 Highwhen active
4DATA2 Highwhen active
I5tDATA3 IHi~hwhen active I
6DATA4 Highwhen active
7DATA5 Highwhen active
8DATA6 Highwhen active
9DATA7 Highwhen active
10 ACK 5ys lowpulse acknowledges receipt of data
11 BUSY Lowwhen printer ready to receive data
12 PAPER High when paper out. Can be disabled with DIP switch
setting
13 SELECT Highwhen urinter is on-line
I14.15 IN/C II
WND~~~~utfrom~intc
Chassisground(Isolatedfromsignalground)
19-30 GND Twisted pair groundreturn
31 RESET When thisinput signal is low, printer is reset
32 ERROR Outputslow when printer cannot continue, due to an error

I33 IEXTGND IExternal mound I

34,35 N/C
36 SELECTIN Always high
102