Parallel/Centronics printer

[Scott Lawrence]

Has anyone made a Parallel/Centronics printer interface, or in the very least, looked into what it would take to add a printer interface to the 'rc?

-s

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Scott Lawrence
yor...@gmail.com

[Spencer Owen]

Hi Scott,

I looked at that a while ago.  The 8255 would be a good chip to use for this, and from a hardware point of view it's fairly easy to do.  However, I would struggle with making software drivers for it.

Also, I'm lucky enough that my dot matrix printer has Centronics, RS232 and USB connections, so it's not something that I need any time soon.

A couple of years ago, however, I did make a little adapter that allows a Sinclair ZX Printer (the little thermal printer) to be plugged in.  Again, from a hardware side, it's fairly trivial to do.  I can make dots on the paper as a proof of concept, but actually driving it to print anything useful is going to take some time to sort out.

Spencer

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[Scott Lawrence]

Sounds like a nontrivial problem. Great to hear!  That means I can give away this dot matrix printer without regretting doing so later. ;)

-s

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Scott Lawrence
yor...@gmail.com

[A A]

On Monday, April 3, 2017 at 10:53:09 AM UTC-6, Spencer Owen wrote:

I looked at that a while ago.  The 8255 would be a good chip to use for this, and from a hardware point of view it's fairly easy to do.  However, I would struggle with making software drivers for it.

Quite often it was done with a few TTL chips.  The driver can be a simple alternation of IN/OUT to generate strobe / collect status and output a byte.