[Coco] 26-3124 M.P.I. Upgrade #2

[Mark Marlette]

John,

I have done a few of these mods.... :)

A few observations on your procedure.

1. 16v8 is ~1.00, 74LS10 is ~$0.50.
2. Difference between cut trace & cut pin? I have never reversed the mod after it was installed.
3. 100% compatible with the Tandy Satellite Board Upgrade, install both?

A good training exercise.

Regards,

Mark



----- Original Message -----
From: sales at gimechip.com
To: CoCoList for Color Computer Enthusiasts <coco at maltedmedia.com>
Sent: Tue, 29 Jun 2010 11:49:57 -0000 (UTC)
Subject: [Coco] 26-3124 M.P.I. Upgrade #2

I've just posted my method of using a 16v8 GAL chip to upgrade the 26-3124 M.P.I. to CoCo 3 compatibility here:
http://www.coco3.com/community/2010/06/26-3124-mpi-coco-3-upgrade-2
Normally, this is done with a 74LS10, a trace cut, and some jumper wires. My method DOES NOT require a trace cut and is 100% compatible with the Tandy Satellite Board Upgrade. The caveat? You have to program a 16v8.
-John

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