lfm@fpssun.fps.com (Larry Meadows ) (04/14/89)
I'm looking for information on the original Canon engine (is it SX or CX?), i.e. the one in the HP LaserJet/LaserJet+ or the Apple Laserwriter. Specifically I would like documentation on the interface to the engine itself, including connector pinout, timing, and programming information. I have the HP service manual but it's not real helpful. What I want to do is some hardware hacking on the printer. If anyone has this information or a source please send me mail; the usenet address tektronix!fpssun!lfm is probably most reliable. Also you can call me at (503)245-3271. I'm also interested in any information on the LaserJet print controller, especially the font cartridge 50-pin pinout. I'll also buy a used LaserJet+ or Laserwriter1 interface board if you have or know of one for sale. Thanks a bunch! Larry Meadows -- Larry Meadows @ FPS ...!tektronix!fpssun!lfm ...!nosun!fpssun!lfm
rick@pcrat.UUCP (Rick Richardson) (04/16/89)
In article <438@sns4.fpssun.fps.com> lfm@fpssun.UUCP (Larry Meadows ) writes: >Specifically I would like documentation on the interface to the engine >itself, including connector pinout, timing, and programming information. > >I'm also interested in any information on the LaserJet print controller, >especially the font cartridge 50-pin pinout. Gee, I'd like to get this info, too. So if anybody knows where to get it, how about posting it here, instead of just mailing it to the poster. -- Rick Richardson | JetRoff "di"-troff to LaserJet Postprocessor|uunet!pcrat!dry2 PC Research,Inc.| Mail: uunet!pcrat!jetroff; For anon uucp do:|for Dhrystone 2 uunet!pcrat!rick| uucp jetroff!~jetuucp/file_list ~nuucp/. |submission forms. jetroff Wk2200-0300,Sa,Su ACU {2400,PEP} 12013898963 "" \d\r\d ogin: jetuucp
henry@utzoo.uucp (Henry Spencer) (04/18/89)
In article <729@pcrat.UUCP> rick@pcrat.UUCP (Rick Richardson) writes: >Gee, I'd like to get this info, too. So if anybody knows where >to get it, how about posting it here, instead of just mailing it >to the poster. Yes, definitely. To start out, if enough people make noises about it, I'll post (somehow...) my schematic for the LaserJet font cartridges. I took one apart and traced it out. It's basically just some EPROMs with a bit of interface logic. (The reason I'm hesitating a bit is that getting it into machine-readable form is a hassle, and having a spec for the cartridge connector would be better -- you can't tell from the cartridge whether the slot has other capabilities that a ROM cartridge doesn't use.) -- Welcome to Mars! Your | Henry Spencer at U of Toronto Zoology passport and visa, comrade? | uunet!attcan!utzoo!henry henry@zoo.toronto.edu
berger@clio.las.uiuc.edu (04/18/89)
Have you tried the service manual for the HP printer? I thought that had some interfazce details.
henry@utzoo.uucp (Henry Spencer) (04/24/89)
In article <17700029@clio> berger@clio.las.uiuc.edu writes: >Have you tried the service manual for the HP printer? I thought that >had some interfazce details. It has just enough to tantalize you. The mechanical end is discussed in great, nay excruciating :-), detail, but the electronics are barely touched on. The controller board is treated as a black box. -- Mars in 1980s: USSR, 2 tries, | Henry Spencer at U of Toronto Zoology 2 failures; USA, 0 tries. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu