Re: ◾NSC 8477 Was: New takes on XT-IDE, a new FDC, and a new CM/S GAL

Chuck Guzis cclist at
Thu Dec 20 11:28:12 CST 2018

On 12/19/18 10:40 PM, Ali via cctalk wrote:
>> No, the CCIV initially had a plain-jane Intel rev 0 82077AA in a 68 pin
>> PLCC.  After Intel "improved" the chip to the 82077AA-1, FM ceased to
>> work.  Fortunately, as I mentioned NSC 8477 is a plug-in replacement,
>> with the exception of not needing an extra external cap (the pin is NC
>> on the National chip).
> Chuck,
> I read through the thread at VCF and see that the 8473 is not drop-in swappable with the 8477. One more question on the 8477 do you know if there is a significant difference between the 8477AV and the 8477BV revision? Thanks.

No, I'm not aware of any specifics.  Both versions have worked for me.


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