mike@bria.AIX (Mike Stefanik/78125) (01/03/91)
Hopefully someone out there could give me a hand with a printer that is giving me a major headache. A client of ours has an old Printronix P300 serial line printer which they want connected to their RS/6000 320. The OS is running with the 3002 updates, and the printer port is configured as a 9600 bps 8/2/N "other serial printer". We have not been able to get the printer to work using IBM "standard" RS232 cabling (interposer and all). I flew up to the site and brought my trusty "paperclip with lights" (ie: breakout box) and discovered something strange: the printer worked swimmingly when I jumpered DSR to RTS, forcing RTS high. After playing with it for a while, it seemed that RTS needed to be forced high for the printer to remain conscious. Just for giggles, we built a cable like this, and the printer worked *until* the system was rebooted; then terminal brain-death (on the part of the printer). We talked to Printonix, and they said that the P300 knew nothing about XON/XOFF (so we changed that to "no" via SMIT) and used DTR. Other than that, they couldn't give us any useful advice. We have three other printers on the same mux, and all of them are working just fine (they're HP Laserjet III's). Question: has anyone out there tried to hook up a Printronix P300 to an RS/6000? To any type of UNIX box? Thanks in advance for any and all suggestions. ----------------------------------------------------------------------------- Michael Stefanik, Systems Engineer (JOAT), Briareus Corporation UUCP: ...!uunet!bria!mike "If it was hard to code, it should be harder to use!"