[Coco] Adapting a V9958 64-pin Chip to fit a Solderless Breadboard

[Kip Koon]

Hi Jim!
Sorry I did not get back with you.  I have created an adaptor for the V9958
or for that matter any SDIP64 style chip to fit in a breadboard.  I have not
fabricated one yet as it would be a while before I got that far in the build
of my Kipper computer.  If you need one, I can go ahead and have them made.
Someone else is interested in this adaptor also.  How different is the V9990
to the V9958.  I thought the V9990 had the same physical specifications.  I
have had a couple on hand for a while too, but I have not had a chance to
use them yet.  What makes the V9990 easier to use?  I'd be very interested
to see what you have found out about the V9990.  I'm very interested in your
Coco Internal modifications utilizing this chip.  Would you consider sharing
you design once you have completed it?  I have a problem with a very simple
modification that I've been working on myself that is proving to be kind of
difficult.  I'd like to share it with you sometime and get a pearl of wisdom
from you.  Thank you in advance.  Take care my friend.
Kip

-----Original Message-----
From: coco-bounces at maltedmedia.com [mailto:coco-bounces at maltedmedia.com] On
Behalf Of iggybeans at comcast.net
Sent: Thursday, November 28, 2013 8:36 PM
To: Coco at maltedmedia.com
Subject: Re: [Coco] Adapting a V9958 64-pin Chip to fit a Solderless
Breadboard

Yes, the V9958 is an SDIP with closer spacing on the pins than breadboards
are designed for. 
I'm surprised Kip didn't contact me about that, since I've had them on hand
for a couple months now. 
I've actually found it easier to use the more advanced V9990, since I can
mount that to a carrier board that has standard spacing. 
While an complicated solution, a similar carrier board could be designed for
the V9958. 
Or the VDP could be mounted on a separate surface and wire wrapped into an
breadboard design. 

In any case, I'd highly recommend Yamaha VDPs for 80 column projects (and to
experiment with Sprite fraphics and the other included functions). 
These chips should lend themselves to use in a pak. 
Right now, I'm considering a more complicated internal modification. 

I hope you guys post your progress. it should prove interesting. 

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