Re: c64 breadbin vs c64c

From: Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de>
Date: Mon, 16 Oct 2023 18:36:49 +0200
Message-ID: <1c16bb24-03f0-4695-9bff-40fe24803a81_at_laosinh.s.bawue.de>
On 10/16/23 18:05, didier_at_aida.org wrote:
> I checked the mother board, it's written
> 
> PCB ASSY NO 250469
> 
> PCB NO 252311 REV B
> 
> apparently the same motherboard as this one:
> 
> https://www.c64-wiki.com/wiki/File:C64Cmotherboard.jpg
> 

That's the revision where the color RAM is integrated into that large 
64pin IC.

The combined BASIC/KERNAL ROM (28pin IC near the CPU) can be replaced by 
a properly programmed 27128 EPROM if it ever goes bad.

  Gerrit



> 
> 
> 
> On 16/10/2023 14:20, Gerrit Heitsch wrote:
>> On 10/16/23 14:06, didier_at_aida.org wrote:
>>> Hi :)
>>>
>>> I just got a c64c in a very good state
>>>
>>> any idea of the compatibility of the chips between the c64 breadbin 
>>> and the c64c ?
>>>
>>>
>>> for each machine I have I prepare a box with spare parts...
>>>
>>> for example I have:  6510, 6569, 6581, 6526
>>>
>>> are they usable in the c64c or do I have to find other parts
>>
>> 6510 is compatible with the 8500 in the C64C. The 6526 in the C64C is 
>> internally a 8521, but still labeled as 6526 and any 6526 can be used 
>> in a C64C. But the 6581 SID needs some rework on the PCB if you want 
>> to use it instead of a 8580. Same goes for the 6569 if you want it as 
>> replacement for 8565.
>>
>>  Gerrit
>>
>>
>>
> 
Received on 2023-10-16 19:00:14

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