frank@ames.arc.nasa.gov (Frank Gorishek) (08/22/89)
In sun-spots v8i92, joe@islsun5.mse.lehigh.edu (Joe Sieczkowski) writes: | I was never able to get XON/XOFF to work proberly with my NEC LC 890 | PostScript printer. I'm running Sun version 3.5. It seems like the sun | never sees the ^S from the printer. My final solution was to set the | printer at 1200 baud .... ie spoon feed it. | ... | | If I even think about increasing the baud rate to 9600...the printer | looses output. If anyone out there knows a solution to this I would | appreciate it. We had the same type of problem here. As it turns out the LC890 doesn't drive "true RS232" (i.e., it drive +/- 5volts NOT +/- 12volts). The serial port on the sun just can't see anything the LC890 sends out. We replaced the printer, however there are such things as TTL/RS232 converters. --frank -- Frank Gorishek frank@AMD.COM 512-462-4117 or 800-531-5202 x54117
mark@drd.Com (Mark Lawrence) (09/16/89)
} In sun-spots v8i92, joe@islsun5.mse.lehigh.edu (Joe Sieczkowski) writes: } | I was never able to get XON/XOFF to work proberly with my NEC LC 890 } | PostScript printer. [...] amdcad!cayman!frank@ames.arc.nasa.gov (Frank Gorishek) wrote: } X-Sun-Spots-Digest: Volume 8, Issue 103, message 11 of 14 [about how to raise the line level voltages so that the computer would *see* the crummy XOFF's] The way we fixed it was to buy a serial/parallel convertor buffer box that you can buy at any PC store for ~US$100. We hooked it up at 9600 bps to the Sun configured to do XON/XOFF and hooked it up parallel to the printer. Everything works _reliably_. I've been pretty happy with the `ol brick outhouse (as somebody once described the '890) since we did all this. Take heart, things _do_ get better with SunOS 4.x as far as describing the modes you want on the serial line in your printcap. mark@DRD.Com (918) 743-3013 Jer. 9:23,24 {uunet,rutgers}!drd!mark