friedtj@... wroten on Wed, May 30, 2001 at 10:07:12AM +0200:

> I just checked on the oscilloscope if anything is happening on the
> parallel port (0x378, LPT1): I cannot see any signal variation.
> VMU2PCAlphaRelease.zip will not work for me as it is compiled
> to run under windows only (I only have a DOS/Linux box running).
> I suppose I have to understand how to cross compile to DOS from
> Linux DJGPP, but I have never tried that.

The VMU2PC-djgpp is not much more than a compilation of the
VMU2PCAlphaRelease using the DJGPP cross-compiler under linux, so you
don't have to do that.

> I used the software by Soren (VMU2PC-djgpp, cross-compiled throught
> DJGPP): this is the one that does not seem to be communicating with
> the parallel port, even though I precise -t 0x378 or -t LPT1.
> Can you confirm if I am using the right software, or otherwise which
> version I should use for VMU/PC communication through the parallel
> port ?

The software you use is the correct one. You won't see any communication on
your oscilloscope until the initial handshake:

The PC sets pin 6 of the VMU to 1 (3.3V).

If the VMU is ready (display shows "WAITING FOR DATA") it responds by
setting pin 11 to 0.

The communication now starts, you can find more info on
<http://soeren.infoserv.de/vm/vm2vm.html>.

Now some wild guesses what your problem could be:

You have to connect pins 1 and 14 on the VMU.
Pin 1 is the rightmost pin when holding the VMU as if you are playing.
Try setting your parport to SPP in the BIOS setup.
I have read about incompatible parports on Pentium-II/III mainboards, if
possible try an old ISA parport card.

Sören