[Coco] MPI mod for coco3

[Luis Fernández]

Hello friends 
I'm trying to sort cocopedia information about the modification of MPI for use in coco3, and have some doubts 
There are 4 models Multipak interface 

Exist the Following models: 
26-3024 Grey 
26-3024 White 
26-3124 White 
26-3124A White


The latter does not require modification (that's right?) 
The first two have the same internal circuit. and would like to revise my outline, not a lot of electronics. 

Apparently there are two methods, one changing the PAL / GAL chip, not that this is not where (or number) in the two boards 
And the other placing a 74LS10 to restrict the addresses and stuff. 
Is this true or both at once are needed? 
thanks



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Making  CoCoDskUtil V 1.X.X, Scan magazines and organize maltedmedia
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My personal blog: http://www.luis45ccs.blogspot.com, 
Excuse my English, I use google translator, my language is Spanish, I'm Spanish but I live in Venezuela
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