[Coco] Extended Basic Upgrade Options

[Dave Philipsen]

http://www.ebay.com/itm/MCM68764C-Semiconductor-Electronic-Component-/171739050313?pt=LH_DefaultDomain_3&hash=item27fc71f149

On 4/7/2015 10:59 AM, Joe Grubbs wrote:
> DIP-24 8Kx8s seem to be as rare as hens teeth. I have NOS ones that I'm saving for... whatever. Does anyone know of a decent source for the 24 pin variety or are we stuck with 28s nowadays?
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>> From: computerdoc at sc.rr.com
>> To: coco at maltedmedia.com
>> Date: Tue, 7 Apr 2015 00:12:47 -0400
>> Subject: Re: [Coco] Extended Basic Upgrade Options
>>
>> Hi Don,
>> I have a 24-pin rom/eprom to 28-pin 2764 eprom adapter PCB I designed that could give you the capability of using 28-pin eproms inside your Coco 2.  Is there a 26-3027 Coco 2 or is it a 26-3127 Coco 2?  If so, I have a 26-3127 I can use to check for layout correctness.  I had made it to adapt the 24 pin rom socket in my floppy controllers to accept 28 pin 2764 eproms, but until now I have not needed to use it to adapt rom sockets on CoCo motherboards.  I'm on vacation at the moment, but when I get back home Sunday, I'll check it out for you.  I can provide the Extended Basic 1.1 rom you need also.  I thought you might what to know.
>>
>> Kip Koon
>> computerdoc at sc.rr.com
>> http://www.cocopedia.com/wiki/index.php/Kip_Koon
>>
>>
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