[Coco] Mutiipack

[Frank Pittel]

Not sure if it's still the case but Could 9 sold the PAL upgrade chip and
had instructions for doing the upgrade on the newer multipaks.

The Other Frank


On Thu, Sep 06, 2012 at 05:35:56PM -0400, Bruce W. Calkins wrote:
> 
> ----- Original Message ----- From: "Darren A"
> 
> On Thu, Sep 6, 2012 at 2:41 PM, Luis Fernández wrote:
> >
> >Hello friends
> >I need to understand some things.
> >The Grey multipack can connect to the coco 1, 2 or 3
> >The white multipack coconut can connect to the 1, 2 or 3
> >26-3029 controller can be used in the coco2 or 3? I think not
> >The controller DISK DRIVE FD-500 can be used in coco1, and can use
> >gray disk drives?
> >
> 
> All MultiPaks will work with all CoCos, but an upgrade may be needed
> to use them with a CoCo3.  The older model (like the grey) needs only
> a new PAL chip. The later model requires a more complicated upgrade.
> 
> All of the Tandy floppy controllers will also work with all CoCos.
> However, the earliest model (26-3022) requires a 12 volt supply and
> therefore requires either a MultiPak or 12v external power to be used
> with a CoCo 2 or 3.
> 
> Darren
> 
> ===================
> 
> Upgrading the earlier MultiPak requires that one find a programed
> PAL/GAL chip.  I have heard of piggybacking the PALs with a switch
> too for backwards compatability.  Upgrading the newer version
> MultiPak uses (IIRC) a 74LS10 and a little effort soldering it on
> piggyback and running a few wires and cutting a trace.  I did not
> find it hard and at the time it was easier than finding a programed
> PAL for the older one.
> 
> Bruce W.
> 
> 
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