[Coco] Controller question

[Arthur Flexser]

Other differences between the FD501 and the FD502 are that the FD501
takes a 24-pin ROM and the FD502 a 28-pin one;  the FD502 is
physically shorter;  and the FD502 lacks the pin on the edge connector
for accessing the upper 8K of the ROM.

Art

On Wed, Aug 29, 2012 at 6:33 PM,  <jdaggett at gate.net> wrote:
> Bib
>
> Thanks for the clarification. Then the original controller 3022 which had the WD1793
> predates the FD500. I have the 3022 (large case), FD501 and FD502 (both small case).
> Never had the FD500. The real differences that I see between the FD501 and FD502 is the
> crystal frequency changes from 16 MHz to 8 MHz oscillator. Also the drive cable connector
> has inductors inline for EMI reduction.
>
> james
>
> On 30 Aug 2012 at 7:15, Bob Devries wrote:
>
>> Hi Bill,
>>
>> I just compared it to a FD500 controller I have here, and it's identical.
>>
>> Regards, Bob Devries
>> Dalby, QLD, Australia
>>
>> ----- Original Message -----
>> From: "Bill" <cwgordon at carolina.rr.com>
>> To: "Coco Enthusiasts" <coco at maltedmedia.com>
>> Sent: Thursday, August 30, 2012 5:46 AM
>> Subject: [Coco] Controller question
>>
>>
>> > AFTER I had sold both my Cocos, I ran across a drive controller in a plain
>> > case that I cannot identify. Can anyone tell by this picture what it is?
>> >
>> >
>> >
>> > http://www.sq1bbs.com/controller.jpg
>> >
>> >
>> >
>> > Thanks
>> >
>> >
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>>
>>
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>
>
>
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