From: martin@oc2.oc.chemie.th-darmstadt.de (Martin Kroeker) Subject: [Q] lpr and serial plotter Date: 13 Jun 1993 19:22:42 GMT
Has anybody succeeded in configuring a serial plotter or even a dumb
printer ? Plotting itself _does_ work, as long as one sets the baud
rate with stty instead of specifying it in /etc/printcap. However, I
can not get hardwire handshaking to work properly. Although the stop signal
is obviously recognized by lpd, the HP7550 signals an I/O buffer overflow.
Furthermore, lpd then retransmits the whole file, so the plotter never
finishes. My current setup is 2400 with ixon/ixoff flow control (which is
very probably ignored...), but this is too slow for practical purposes, and
lpd throws away files when the plotter is not ready.
This is with 0.99p9 and the lpr/lpd binaries from SLS 1.02. I have already
tried the corresponding NET2 sources because I had to comment out an
unsupported ioctl, and they seem to be identical.
Thanks in advance for any suggestions,
Martin
-- Dipl.-Ing. Martin Kroeker kroeker@oc1.oc.chemie.th-darmstadt.de Inst. f. Organ. Chemie martin@oc2.oc.chemie.th-darmstadt.de Univ. (TH) Darmstadt db7p@mvs.hrz.th-darmstadt.de Germany (in real life: <not determined> )