Commodore 2031LP and Zoomfloppy

Hi there,

I was finally able to do some tests using my zoomfloppy and a real 2031LP, a 
1541 converted to IEEE488 using the 64er schematics and ROM, and a 1001.

What I found was that the 1001 was working very well, even surviving the ROM 
read test on it (a shell script that repeatedly reads the ROM and compares it 
with what it should be).

The converted 1541 would give, after reset, a correct status, but a detect 
command would result in a message like

  8: *unknown*, footprint=<F@NJ>

however the footprint number is actually changing from detect to detect. I 
also got values NIDJ, GNBI, NJNJ, DOB@ ....
In the end it also hangs, but that can be resolved by resetting the drive 
(with the reset button I conveniently added when I converted it :-)

The 2031LP also was giving strange errors on detection. After drive power up, 
status gives the correct message, but detect also returns a similar message to 
the one above.

Both, the 2031 and the 1541par fail reading their ROMs at all.

Just for the fun of it, I connected both the 1001 and 2031lp to the zoomfloppy, 
to get this detection:

fachat@euler:~/Documents/8bit/OpenCBM/opencbm/internal/testsuite$ cbmctrl 
detect
 8: *unknown*, footprint=<DBDC> 
 9: 8250 dos2.7 
fachat@euler:~/Documents/8bit/OpenCBM/opencbm/internal/testsuite$ cbmctrl 
detect
 8: *unknown*, footprint=<B@EC> 
 9: 8250 dos2.7 
fachat@euler:~/Documents/8bit/OpenCBM/opencbm/internal/testsuite$ cbmctrl 
detect
 8: *unknown*, footprint=<C@BL> (cannot determine cable type)
 9: 8250 dos2.7 
fachat@euler:~/Documents/8bit/OpenCBM/opencbm/internal/testsuite$ cbmctrl 
detect
 8: *unknown*, footprint=<DOB@> 
 9: 8250 dos2.7 

But still failing to read the ROM. But at least it does not disturb reading 
the ROM on the 1001.

Interesting. It seems either the 2031 has a problem with the IEEE488 protocol 
of the zoomfloppy, or something is different with I guess M-R with which the 
ROM is read (and the drive type detected?)

Regards
André