According to Christoph Badura:
>
>derry.birse@ind.alstom.com writes:
>
>>I am nearing my wits end with regard to setting up a serial port connection to
>>an HP DeskJet 550c on a Sun 3/60 running NetBSD 1.3.2, can anyone help?
>
>>I can print text files without any problems, however when I send a graphics file
>>generated by ghostscript it manages one raster line and then proceeds to print
>>gibberish.
>
>My first guess would be that the tty driver is doing LF->CR/LF conversion.
>Maybe changing the output mode with the ms= string helps.
>

My guess would be flow control.  You should be using hardware flow
control to the printer.  I don't know if HP changed their policy on
this but when I was playing with a HP PaintJet they were using the DTR
line to do flow control - I made up a cable that wired the DTR to the
CTS on the computer side.

-- 
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Brett Lymn, Computer Systems Administrator, British Aerospace Australia
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