Re: 2764 -> 2364/68764 adapter

From: Jim Brain <>
Date: Wed, 13 Jul 2016 18:05:44 -0500
Message-ID: <>
On 7/13/2016 4:27 PM, smf wrote:
> On 13/07/2016 18:12, Jim Brain wrote:
>> In any case, the PCB in my store attaches _OE of the 2764 socket to 
>> _CS of the 2364.  If your 2764 does the same, you're done.  If it 
>> uses _CE to trigger (which I have not seen), cut the trace and 
>> jumper. If it uses both (which I have seen, though rarely), It's OR 
>> gate time.  If you deadbug the IC, you can stash it in the interior 
>> of the 24 pin socket, as you only need 5 connections (A,B,Y,PWR,GND)
> In light of reading the datasheets in further detail I agree.
> However I still think you won't just be able to throw a MCM6876x in a 
> converter, stick that in an eprom programmer that only supports 27xx 
> and burn it. The adapter only deals with the read differences, not the 
> write differences.
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I can't argue there.  I think such an adapter makes the most sense if 
you need to put a 2364 into a programmer for reading, or you need to put 
a 2364 into a circuit that accepts a 2764 (not sure what that use case 
would be, but I will concede it as a use case) or you bought a 2364 
ROM-el from some Commodore fanboy's store and you need to program it in 
a regular programmer, in which case you don't have to worry about Vpp, 
as the ROM-el is a 49F001 or 49F512, and you'll need to wire up a flying 
lead to use as _WE.


Jim Brain

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Received on 2016-07-14 00:00:02

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