joystick2midi

[Paul Perry]

At 10:17 AM 1/12/97 +0100, Martin Czech wrote:

>I recently bought a cheap soundcard (20 DM), just to have midi in/out.
>A joystick to midi adapter was not included, but I thought that this
>was no problem until I realized the prices for theses things : 39 DM!
>Now, I got an adapter from a friend for a while, to measure the
>conection scheme. What surprise: The DIN pins 2 and 4 (which carry the
>midi data current loop) have *NO* connection at all to the 15 PIN
>joystick plug. But the adapter works.  I suspect some active logic
>between the joystick in and midi in/out.  That would be an explanation.
>Now I'm really curious.
>
>Can please anybody give me some info about this strage stuff?
>
.......why yes...... MIDI has a current loop protocol, so there is an
optoisolator in there. I sell made.in asia.somewhere ones for
$US 16, but postage would be about that.... search the net, there are ckts
out there, BTW these are usually called (incorrectly) midi breakout boxes.
And the Gravis is slightly different ;( as you would expect....

paul perry melbourne australia