Re: ZoomFloppy - formatting a disk in a 2031 disk drive

Den Fri, 11 May 2018 06:48:18 +0200 skrev And Fachat <afachat@gmx.de>:
> 
> 
> Am 10. Mai 2018 3:29:24 PM schrieb Rhialto <rhialto@falu.nl>:
> 
> > On Wed 09 May 2018 at 22:28:28 +0200, Spiro Trikaliotis wrote:
> >> Does anyone else have success or was unsuccessfull with other IEEE
> >> drives (4040, 8x50, ...)?
> 
> I haven't tried the ZF yet although I have bought it a while ago...
> (and yes Jim your work is very much appreciated!). It's still on my
> todo list to port XD2031 onto the ZF. And this is the beauty of
> broadly used devices. It attracts more people to build around it!
> (Is IEEE ATN on a pin that allows interrupts?)
> 
> But back to the 2031 problem, IIRC I had no problems running my
> XD2031 firmware tests with all IEEE drives _but_ the 2031 in VICE.
> That were a lot of factors - emulation, my test cases etc but my
> preliminary conclusion was to actually decide there is some
> difference in the 2031 that breaks the usual drive-related code. IIRC
> it was doubted here and I understand it, I would have doubted this
> conclusion from someone else either I guess. Due to time constraints
> I decided not to investigate further, just see this discussion
> ringing a bell here

Are there any people around who has made the german magazine 64er
modification for a 1541 to become a 2031lp?

Or do we even know if this problem only affects the "high profile" 2031
or does it also affect the 2031lp (1541 style case)?

Btw if I had a 1541 with socketed VIA and ROM I would had made the 2031
modification, but all my 1541's have soldered-on ICs and I don't want
to risk frying a 6522 by desoldering as I don't have a good desoldering
station for DIL40 IC's. (The rom could be scrapped by cutting each leg
and then it would be easy to desolder the legs individually). Btw it
would be nice to make a 2.0 version of this mod which includes the
ability to switch back to 1541 mode.

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