Yep, we old-timers often wrote bitmaps to dot-matrix printers. Fortunately
most dot-matrix machines had a pseudo-standard interface usually called Epson
compatibility (does Epson even exist now? - they were the KINGS of printers for a long time...).
One could as
jepri says print a bitmap with a little effort. Naturally you must
decode the graphic file format first, then map the colour info to B&W, but that's old hat. If you can't find
manuals on dot-matrix printers on the net, I'm sure to have a few exmples in my, uh, collection.
I should also mention that the later 24-pin printers had quite a decent
resolution, and IIRC early Ghostscript could do decent postscript on them too. Of course if you
want the output the same day, that's where a real postscript printer comes in!
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