[Coco] multipak question

[Little John]

Definately buy that thing. In my opinion, the older one's are the better 
ones. All multi-pak's except for the 26-3124A (note the A) had to be 
upgraded to work properly on a CoCo 3. The 26-3124A was a 26-3124 that was 
"pre-upgraded" by Tandy. You can make your own pal for the older ones 
(26-3024) using a 16V8 GAL and these equations:
Name     26-3024 M.P.I. Upgrade ;
PartNo   GCC-3024.01 ;
Date     6/1/2010 ;
Revision 01 ;
Designer John Turner ;
Company  GIMEchip.com ;
Assembly 26-3024 M.P.I. Upgrade PAL for CoCo 3 ;
Location U6 ;
Device   g16v8 ;
/* ***************************************** INPUT PINS 
**********************************************/
PIN 01 = !FFXX;       /* LOW For Any Address Between $FF00-$FFFF 
*/
PIN [2..9] = [A7..0]; /* CPU A7 - A0 
*/
PIN 11 = RW;          /* READ = 1, WRITE = 0 
*/
PIN 12 = E;           /* E-Clock 
*/
PIN 13 = Q;           /* Q-Clock 
*/
PIN 18 = !CTS;        /* Cartridge Select Signal. 
*/
PIN 19 = !SLENB;      /* Input To Disable Device Selection. 
*/
/* ***************************************** OUTPUT PINS 
*********************************************/
PIN 14 = !DBEN;       /* Enables The Multi-Pak Interface Data Buffer 
*/
PIN 15 = !IOR;        /* Read the Slot Select Latch. 
*/
PIN 16 = !IOW;        /* Write the Slot Select Latch 
*/
/* ***************************** LOGIC EQUATIONS & VARIABLE DEFINITIONS 
******************************/
FIELD ADDRESS = [A7..0];                        /* 
*/
LATCH = ADDRESS:[7F];                           /* Slot Select Latch@$FF7F 
*/
IOR = LATCH & FFXX & E & RW;                    /* Active on $FF7F and E=1 
and RW=1                  */
IOW = LATCH & FFXX & E & !RW & !Q;              /* Active on $FF7F and E=1 
and RW=0 and Q=0          */
DBEN = (ADDRESS:[40..7F] & FFXX) # SLENB # CTS; /* Active $FF40-$FF7F or 
SLENB or CTS                */
/* 
***************************************************************************************************/

----- Original Message ----- 
From: "Jeremy Michea" <jmichea at cogeco.ca>
To: <coco at maltedmedia.com>
Sent: Sunday, October 24, 2010 12:54 PM
Subject: [Coco] multipak question


> I’ve had an offer of a multipak from a gentleman and he’s going to sell it 
> to me for $5 plus shipping however from the pictures he’s sent me it looks 
> to be the older version:
>
> http://www.flickr.com/photos/oleanny/5106006251/
>
> Is this the one that is coco 1 & 2 only and won’t work on the coco 3?  Its 
> not a HUGE deal since (1) its only $5 and (2) I probably won’t use it that 
> much anyway but it would have been nice to use it with my coco 3. Its 
> boxed and complete and looks to be in very nice shape.
>
> Thanks
> Jeremy
>
> --
> Coco mailing list
> Coco at maltedmedia.com
> http://five.pairlist.net/mailman/listinfo/coco
>