Re: Differences between 8501R1 and 8501R4

From: Frank Wolf <webmaster_at_frank-wolf.org>
Date: Fri, 6 Dec 2019 20:41:31 +0100
Message-ID: <96b7aaf8-6886-3c6d-5b59-b80cf5649570_at_frank-wolf.org>
No that's not correct. The 6510 already had 8 bits of which only 6 were 
bonded.

I also did a side-by-side comparison of theĀ  8500<->6510 some time ago 
and they are 100% identical

apart from the outer perimeter were the buffers/drivers reside.



On 06.12.2019 19:48, smf wrote:
> I'd be surprised if it were lack of space. IMO 6510 only had 6 bits
> because that is what they needed for the c64. No real point in adding
> bits that can't be used because it wouldn't be bonded to a pin.
>
> A 8502 decap would be interesting.
>
> On 06/12/2019 07:15, Frank Wolf wrote:
>>
>> Compatibility or just a lack of empty space for the gate in logic?
>>
>> I'd be curious to see the 8502 die now... but I don't think it's worth
>> any effort
>>
>> to decap this one too.
>>
>>
>>
>
Received on 2020-05-29 23:47:03

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