Centronics Interface Question
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Tom Lake
Oct 12, 2022, 1:44:45 PM10/12/22
to Altair-Duino
I'm still waiting on the conversion header for my Centronics board. While I'm waiting, I have a question:
There are two holes labeled Printer Select on the board. Are they supposed to be jumpered in order to use the board? The photo of the board doesn't show anything in those locations.
There are two holes labeled Printer Select on the board. Are they supposed to be jumpered in order to use the board? The photo of the board doesn't show anything in those locations.
da...@hansels.net
Oct 12, 2022, 1:58:50 PM10/12/22
to Altair-Duino
That is a place for an optional jumper to control the "Select" line on the printer (pin 36 of the
centronics connector). My printer (a Tandy DMP-130) doesn't care about it but some printers may
need the "Select" line to be pulled low in order to communicate. Bridging these two pins on
the board will pull "Select" low. If your printer won't respond then I'd suggest installing a jumper
there.
centronics connector). My printer (a Tandy DMP-130) doesn't care about it but some printers may
need the "Select" line to be pulled low in order to communicate. Bridging these two pins on
the board will pull "Select" low. If your printer won't respond then I'd suggest installing a jumper
there.
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