Re: TI-H: Internal memory expansion

Re: TI-H: Internal memory expansion

• To: ti-hardware@lists.ticalc.org
• Subject: Re: TI-H: Internal memory expansion
• From: Grant Stockly <gussie@alaska.net>
• Date: Sun, 23 Aug 1998 10:25:44 -0800 (AKDT)
• Delivered-To: ti-hardware-outgoing@towerguard.unix.edu.sollentuna.se
• In-Reply-To: <19980823.122909.7655.2.ajk22@juno.com>
• Reply-To: ti-hardware@lists.ticalc.org

>Has anyone here done a completely internal memory expansion on their 86.
>I don't care how much skill is required, If it has been successfully
>done, I want to hear about it.  If you just have an Idea of how it could
>be done but haven't actually done it, I don't want to hear about it, only
>people who have actually done this on an 86 please.

I made an EII but I didn't use diodes and i used 2 I/O pins instead of 1.
the only problem with that is you need lots of 'nop's to slow down after
each sbi/cbi.

Then you hve to make an extremely small PCB using surface mount parts.  Do
a breadboard model and figure how much parts you can do without.

Mine fits inside my 85.

• TI-H: Internal memory expansion
• From: ajk22@juno.com (Andrew J Kalafut)

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