Re: TI-H: Internal memory expansion

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: Internal memory expansion
From: "David Knaack" <dknaack@hotmail.com>
Date: Wed, 12 Aug 1998 08:19:59 PDT
Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
Reply-To: ti-hardware@lists.ticalc.org


>From: "marcel groenendijk" <m_groenendijk@hotmail.com>
>I have made a simple but effective memory expansion on my ti-85. It's 
>like this: On th main pcb there are three ic's, of which the middle one 
>is a 32Kb SRAM ic. I have bought a second one (cost about 5 guilders, 
>which is about 2.5 US Dollars) and i have placed this above the 
original 
>ic. Furthermore i have disconnected pin 20 (Chip Select) of both ic's 
>and used a switch to connect one of them to the main board (used two 
10K 
>resistors to pull them up to +5V.)

Sounds like one of the best memory expansion mods I've heard.

I'd like to see a document explaining it, and pictures of the
installation.  A list of compatible IC's and locations where they
are available would be nice too.

DK

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