Re: UDC short mystery - 2 different cards that both hate my Apple 5 1/4" - Different revs?

[James Littlejohn <narguthru@yahoo.com>]

On Jun 11, 4:32 pm, "atfphotogra...@gmail.com"
<atfphotogra...@gmail.com> wrote:
> On Jun 11, 7:15 pm, David Wilson <mcs6...@gmail.com> wrote:
>
>
>
> > On Jun 12, 5:55 am, "atfphotogra...@gmail.com"
>
> > <atfphotogra...@gmail.com> wrote:
> > > I was curious that my original "gold" card is missing parts from the
> > > "green" card. Might it be a later version that didn't need those
> > > parts? I also noticed the green had wire-wraps on the back.
>
> > Very interesting. My card is green but matches your gold card (no XTAL
> > and no wires on the back).
>
> > > So I couldn't get anything but Apple 3.5" floppy drives to work on my
> > > original UDC short "gold" card. When you put on a Apple 5 1/4" (NON
> > > Unidisk) drive, it would first give out a very large "GRRRRR" and then
> > > just spin the drive with the active light on. One them actually booted
> > > after the roar but only worked once or twice.
>
> > I have never tried a "real" Apple 5.25 on my card (although now I do
> > have one and could try it if needed). I have a 40 track "Super 5"
> > brand half height 5.25" drive connected to mine via a homemade D19 to
> > IDC20 cable. I also ran a Macintosh 800k drive (the rectangular cased
> > no eject button unit) but the performance was poor and I eventually
> > got a couple of Apple 3.5 drives which work much better.
>
> > > Maybe picking up the updated BIOS from reactive?
>
> > That firmware just changes the 5.25" ProDOS block device support from
> > 35 tracks (280 blocks) to 40 tracks (320 blocks).
>
> > It would be interesting to know if your two cards have different
> > firmware versions - can you dump the ROMs and compare the contents?
>
> Hello,
>
> I would be delighted to be able to dump the ROMS, but I don't know
> how! I really must learn how to make ROMs. It would be easier for
> testing all sorts of odd things here.
>
> Any suggestions for reading up and what sort of low cost equipment for
> it?
>
> I was looking at the ROM images on reactive for download but I have no
> idea which chips I need to program them onto and which USB based
> writer would be good.
>
> If you ever get a chance to try any other drives on your card, please
> let us know how it goes. Not a big deal but I was hoping to drive both
> Apple 5 1/4" and Apple 800k drives on one machine with the card.
>
> Best!
>
> ATF

I use the Willem Eprom programmer. Really cheap, and works very well.
Here is a link to the one like I have for $16.

http://tiny.cc/jJmYz