| MediaWiki:Sitenotice |
|---|
| 2026-03-12: Cocopedia.com is now using a new caching system that should make things faster. Please let me know if you encounter any new issues.
2026-03-15: MediaWiki has been reinstalled and the old database and files restored. It was pretty clogged up from being upgraded so many times since 2004. I am also testing out Cloudflare to see if it can prevent the 'bot assaults that took the site down last year. OS-9 Al (talk) 21:20, 15 March 2026 (EDT)) |
Multi-Pak Interface: Difference between revisions
| Line 49: | Line 49: | ||
=Mod= | =Mod= | ||
The 74LS10 can be mounted on another | The 74LS10 can be mounted on top of another chip to provide provide power and ground, attaching pins 7 & 14 with pins 7 & 14 of the mounted chip. Bend out the other pins to not touch the underlying chip (unless by design) and run wires to the appropriate points to provide the logic needed. The points differ for the 26-3024 and 26-3124; both modification outlined here (and in above links): | ||
'''(26-3024)''' | '''(26-3024)''' | ||
Revision as of 15:45, 18 April 2021
| WELCOME |
|---|
| Looking for CoCo help? If you are trying to do something with your old Color Computer, read this quick reference. Want to contribute to this wiki? Be sure to read this first. This CoCo wiki project was started on October 29, 2004. --OS-9 Al Read-only mirror: https://cocopedia.dgb3.net |
See Recent Changes. | About this site. | Join the E-Mail List or Facebook Group. | Contact me with updates/questions.
This page was last updated on 04/18/2021. Total Pages: 749. Total Files: 997.
Home / Hardware - Multi-Pak Interface
The MULTI-PAK is a peripheral that plugs into the expansion slot (cartridge port) of the Color Computer and expands it to handle up to 4 cartridges interchangeable and can be used one at a time without having to put out one another. This exchange of the 4 slot can be done without shutting down the computer, although sometimes a reset is required. You can even do some things with several at once.
The following models exist:
- 26-3024 Grey
- 26-3024 White
- 26-3124 White
- 26-3124A White
There are also custom made MULTIPAK and 8 Slot MULTIPAK
To use the MULTI-PAK smoothly with Color Computer 3, use this:
Upgrading 26-3024 MPIs uses a PAL/GAL chip programmed for the CoCo 3's addressing pattern.
Upgrading the 26-3124 involves trace cutting and wiring in a 74LS10 chip to change the addresses.
To make a 20-3024 Multi-Pak Interface work with both a CoCo 1/2 and a CoCo 3 requires a piggybacked PAL/GAL with a switch to activate one or the other. I'm sure someone can figure out some circuitry to switch the 20-3124 type Multi-Pak Interface.
Neither setup is stable with the other CoCos. That is, once you upgrade to the CoCo 3 address set, your CoCo 1/2 will be unreliable with that Multi-Pak Interface.
26-3124 Multi-Pak Interface CoCo 3 Upgrade #1
26-3124 Multi-Pak Interface CoCo 3 Upgrade #2
26-3024 Multi-Pak Interface CoCo 3 upgrade By Robin W. Drake
Besides the two that provides Cloud-9 hardware Upgrade PAL Multi-Pak, but you have to send the MULTI-PAK.
The disk controller must be used in slot 4, and while you can use two disk controllers in the Multi-Pak Interface, problems exist.
Links
- Multi-Pak Interface Owners Manual (Tandy)
- Multi-Pak 26-3124 for the Color Computer 2 Owners Manual
- 8-slot-mpi-multi-pak-interface-design
Video
- YouTube Atarileaf Package Video November 1, 2010
- YouTube Atarileaf with a joke about MULTI-PAK in the movie The Fifth Element
- Custom Multi-Pak YouTube Tom Interface for the Tandy Radio Shack Color Computer
Mod
The 74LS10 can be mounted on top of another chip to provide provide power and ground, attaching pins 7 & 14 with pins 7 & 14 of the mounted chip. Bend out the other pins to not touch the underlying chip (unless by design) and run wires to the appropriate points to provide the logic needed. The points differ for the 26-3024 and 26-3124; both modification outlined here (and in above links):
(26-3024)
(26-3124)
