Xref: utzoo comp.periphs:1784 comp.sys.hp:2095
Newsgroups: comp.periphs,comp.sys.hp,ne.wanted
Path: utzoo!henry
From: henry@utzoo.uucp (Henry Spencer)
Subject: Re: LaserJet cartridges, More RAM, (with original LaserJet 2686A)
Message-ID: <1989May24.155135.29292@utzoo.uucp>
Organization: U of Toronto Zoology
References: <223@insyte.UUCP>
Date: Wed, 24 May 89 15:51:35 GMT

In article <223@insyte.UUCP> m2@insyte.UUCP (Mike Arena) writes:
>...is it possible to upgrade the motherboard in the LaserJet itself?

No.  Once upon a time you could buy an LJ -> LJ+ upgrade, but that was a
brain transplant that replaced the entire board.  The LJ board isn't designed
to be field-upgradeable, and there is also the little problem that there is
no documentation on it.  (The LJ/LJ+ service manual treats the board as a
mysterious black box.)

This is kind of silly, since in principle it's just new RAMs and new ROMs,
but my recollection (from the last time I did the brain transplant) is that
the LJ and LJ+ boards are laid out somewhat differently, i.e. they may have
made other changes.

>I saw an add for a cartridge called JetMemory which had 1.5MB...

Beware that the fine print in the specs for those things often says "for
LJ+ or LJ2 only".  I assume this is because of stupid firmware in the LJ
that isn't up to handling strange-looking cartridges.
-- 
Van Allen, adj: pertaining to  |     Henry Spencer at U of Toronto Zoology
deadly hazards to spaceflight. | uunet!attcan!utzoo!henry henry@zoo.toronto.edu