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From: walter@hpsadle.HP.COM (Walter Coole)
Newsgroups: comp.sys.hp
Subject: Re: more HP 110 questions
Message-ID: <770033@hpsadle.HP.COM>
Date: 15 Sep 90 00:18:33 GMT
References: <1990Sep13.200914.15950@portia.Stanford.EDU>
Organization: HP Signal Analysis Division - Rohnert Park, CA
Lines: 15

There is no space or connector available for memory expansion of an
original, non-plus 110.  However, I have performed a memory
expandotomy on my personal 110;  one removes (carefully unsolders) the
existing, 64k SRAM chips, and substitutes some (fewer) 256k SRAMs,
then installs a special RAM driver.  The memory isn't available as
ordinary RAM (there are some address problems), but one ends up with a
large (~300k) RAM drive.  BTW there are also some speed hacks, too.
Obviously, none of this is supported, and should only be attempted by
someone proficient at soldering.
    I don't think that any of the documentation is available from HP
anymore, but you might be able to find someone with manuals (I never
had them).  You might want to get The Portable Paper, (515)472-6330.

This is absolutely not, in any way, an official statement by
Hewlett-Packard.