[Coco] Updating a CoCo 1's CB and ECB ROMs

[camillus Blockx]

Hi juan,

Is there room enough for stacking two eproms on top. (piggyback), Then you
can leave out both the CE pins of the two eproms. Those pins you connect to
a switch and the middle contact of the switch connects to the CE pin on the
MB. Then you can switch from eprom A or eprom B.  Hope this make sense to
you, mail me if you need more info, or a schematic.

cba


On Tue, Dec 25, 2012 at 10:24 PM, Juan Castro <jccyc1965 at gmail.com> wrote:

> I've been mulling this for some time. Cloud9's DOS Adapter does in
> fact just this (meant for the disk controller) but there's no way two
> of them will fit side by side. (2.2 cm = 0.86 in)
>
>
> http://picasaweb.google.com/lh/photo/FG64tPpeIkBej6KAUXzly29XcHdiH80reA6_ygAbi6M
>
> Gustavo's CoCo 2 is like this. I don't know if the distance is the same:
>
>
> https://plus.google.com/photos/109465536824672578462/albums/5826078853650364673/5826078966275100194
>
> I would need a PCB that goes into both sockets, and has one 27128 (or
> perhaps a 27256 with a jumper for bank select) -- has anyone done
> something like this? Cloud9 guys, do you think this would be viable as
> a product? Or... Mark, what about a Flash version?
>
> Or, a simpler, dirtier solution: just one DOS Adapter, and then I pull
> a wire from A13 to the proper pin of the socket. Would that work?
>
> Juan
>
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