richard@pegasus.com (Richard Foulk) (04/06/91)
I've seen it done on other printers ... Has anyone managed to send to a Laserjet III (with Adobe PostScript cart.) via the parallel port and listen on the serial port? The serial port tops out at 19200, so this is kind of important. On a side issue; does anyone know what processor the LJIII uses? Thanks -- Richard Foulk richard@pegasus.com
amichiel@rodan.acs.syr.edu (Allen J Michielsen) (04/06/91)
In article <1991Apr5.164637.23076@pegasus.com> richard@pegasus.com >Has anyone managed to send to a Laserjet III (with Adobe PostScript cart.) >via the parallel port and listen on the serial port? While I'm not a HP design engineer, I have looked at the HP interface board on a somewhat casual basis (doesn't that qualify me as a expert 8-}...). The interface module for the HP III & HP IIP is basically a plug in module. It appears that this module is controlled BY the printer controller which selects what available protocool to use (serial, parallel, appletalk), then that port is turned on. It doesn't appear that it is even possible to kludge up a way to turn the par & ser 'on' at the same time, without serious hardware hacking. It may be easier to make a modification/addition/ hardware hack that adds something like a 8250 in parallel to the laser output lines to the interface board, then be sure only to use the output line of the 8250 to listen.... al -- Al. Michielsen, Mechanical & Aerospace Engineering, Syracuse University InterNet: amichiel@rodan.acs.syr.edu amichiel@sunrise.acs.syr.edu Bitnet: AMICHIEL@SUNRISE