Re: Commodore PLC TIB DD-001 / Drive 2001

Perhaps you are referring to the PEDISK-II clone:http://www.6502.org/users/sjgray/projects/pedisk2/index.html

This was a group project I was part of.
You can find schematics, gerbers and various utiltities here:https://github.com/mnaberez/pedisk2

It uses a standard FDC, but a fairly early one. The firmware is very minimal, supporting only sector reads. The DOS is loaded from disk and is very minimal (6 character filenames). IE: it's not "Commodore standard GCR" format compatible.
Steve

      From: Francesco Messineo <francesco.messineo@gmail.com>
 To: cbm-hackers@musoftware.de 
 Sent: Sunday, May 20, 2018 1:02 PM
 Subject: Re: Commodore PLC TIB DD-001 / Drive 2001
   
On Sun, May 20, 2018 at 6:56 PM, smf <smf@null.net> wrote:
> On 20/05/2018 17:42, Steve Gray wrote:
>>
>> I was also planning to adapt this design to PET and/or CBM-II just for
>> fun.
>
>
> That would sure be interesting, though dma on the c64 is very much tied into
> the VIC chip. So the adaptation might be extensive.


I'm sure there was a PET floppy expansion that used a "standard" FDC,
it plugged in one of the ROM sockets plus some other few wires (write
signal, maybe IRQ). It was on my todo list to make a clone of it, but
I didn't save the url where I've seen it...

Frank