Let me 'second' the recomendation for that site. I'm interested in larger-than-handehld HPs (everyting from desktop calculators to 2100As), and that site is a great resource, full of user and service manuals, schematics, etc for the machines _and peripherals_. Certainly the first place I look when I want to see what some odd HP computer device was. -tony

I find the easiest thing to do (particularly when a manual could be listed in one of serveral places) is to follow the 'documentation' link appropriate. You can 'waste' many enjoyable hours reading manuals for things you never knew existed :-) -tony

Re: For Classic HP 3000s, look at our "Classic HP 3000 Genealogy spreadsheet" at http://www.allegro.com/papers/HP_3000_Genealogy.html For PA-RISC HP 3000s and HP 9000s, an out-of-date spreadsheet with some information is at http://www.allegro.com/papers/HPPA_Systems.html Stan -- Stan Sieler sieler at allegro.com www.allegro.com/sieler/wanted/index.html

There were at least 2 LBP8s -- the LBP8-A1 and the LBP8-A2. They differed in the amount of intneral RAM (and maybe in the ROMs, I don't know). The LPB8 is a CX-engined printer, it's physically identical to the original HP Laserjet -- even the formatter PCB is the same (and designed by Canon) in both machines. What's different are the ROMs, so the control codes/escape sequences are different. Years ago I was given a broken LBP8-A1 -- the formatter board had a dead PAL on it. As I think I mentioned before, I removed the formatter board and converted it into a CX-VDO printer (no intenral formatter, the interface connector goes straight to the print engine) for my PERQ. I still have the ROMs from the formatter board if you're crazy enough to want to covnert an HP Laserjet (origianl version) into an LBP8-A1. I _may_ also have a user manual for the LBP8-A1. I can look. It might give the esxape sequences. -tony

I am almost sure I mentioned it on this list in the last year. I would guess serrchingthe archives for 'PERQ' would find it. I am not sure what you want to know. I can talk you through taking the CX engine apart, and what the 'DC contorller board' -- the print engine cotnroller with a 7811 microcontroller and a gate array that controls the laser intensity does. And how the various PSUs, laser scanner, etc work. When I was doing this conversion, you seem I had the printer totally apart. And I mean 'totally' I completely stripped down the optical parts and had a pile of mirrors and cylindrical lenses at one point (yes, I did get it all aligned again) As regards the actual conversion, the important bit is trivial. A CX-VDO has a DC37-S interface connector. It's a straight-through ribbon cable board. The last 2 pins on that connector go to an earth tag on the connector bracket. I didn't bother with (and never found out the ocnnections of) the mini-DIN connectoer for some kind of exeternal paper feed. The PERQ never supported that, I don't have one, etc. There's a 6 pin header on the DC controller board that's unused in the LBP8. It carres the status LED signals (ready, paper out, etc). I dismantled the original control panel from the LBP8 (and added a 7 segment display, switches, etc to the junk box), and used 5 of its LEDs and the associated resistors on the origianl PCB. I made a new trim panel for it (not the right layout for an CX-VDO, since I used the old PCB and plastic housing from the LBP8, but that doesn't matter) and soldred a length of ribbon cable to the PCB which ends in a sockt to fit said header. Let me know what you're trying to do and I can probably help. -tony

Tone of voice doesn't come across in e-mail :-(. I can assure you you are not bothering me, and I apologise if that's how my message was taken. What I meant was, even if I say so myself, I could write many pages on the internals of the CX print engine, and I really can't put it all in a single posting to this list. If there;'s something you, or anyone else here, wants to know. I will be happy to provide the information. -tony