Re: Apple ][ using PC floppy

[vladitx <vladitx@nucleusys.com>]

Hi Ferdi,

On Jan 2, 1:52 pm, "Ferdinan Meyer-hermann" <ferdinan.meyer-
herm...@a2central.com.remove-33b-this> wrote:

> I did a similar design about 18 months ago, but I didn't use an FPGA, but a
> simple state machine in a 2716. This was inspired because I was given a bunch
> of 80-Track 5.25 disks with interesting software on them - and I could borrow
> the drives to examine how they worked. To save that stuff I then redid the
> controller (the old controller was a huge PCB). The new board (no PCB) fits
> nicely behind the drive. I've been using my "DuoDisk 3.5" reliably for one year
> now with HD Diskettes and TEAC drives.
>
> I also wrote a formatter for 640-Block ProDOS disks and got a DOS that was
> patched to handle 80 Tracks properly. The guy who did that rearranged the
> Bitmap so that 100 tracks of 16 sectors fit. I'm going to put images of these
> disks online in one of the next days (when I have connected the ][ and the PC
> again)
>
> You can find some photos (and a poorly scanned circuit diagram) onhttp://ferdimh.homelinux.net/apple2/disk35/

Cool work, totally in the retro spirit. Wozniak will be proud with
your FSM implementation. :-) Also congrats on being some year and a
half ahead.