Re: NadaNet on Laser 128?

[schmidtd <schmidtd@my-deja.com>]

On Apr 29, 11:13 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
> Bill Garber wrote:
> > <aiiad...@gmail.com> wrote in message
> >d477351b-6af6-496c-90f3-06a30d5005fd@q1g2000prf.googlegroups.com">news:d477351b-6af6-496c-90f3-06a30d5005fd@q1g2000prf.googlegroups.com...
>
> >>will it work?  I have 4 of them sitting here
>
> >>I guess I'll try and let you know..
>
> >>Rich
>
> > If you find all of the signals inside that are missing from the
> > joystick/mouse port,
> > then,             YES!!!!!!!!!!!!!!!!!!!!!!         they should work.
> > Otherwise, no.
>
> > Michael, feel free to jump in here.  :o))))))))))))
>
> Yes, that's the issue with "compact" machines--if they don't have
> the annunciators (which were on the internal 16-pin game port), then
> they can't "talk".
>
> I've considered an implementation that would use the speaker port for
> a digital output and a pushbutton for an input; however, that would
> not only re-use an output that is widely used (for sounds), but any
> network activity would also sound quite raucus.  ;-)
>
> On the IIc and IIc+, the IOU is different, so you can't even tap
> into the annunciator signals internally (they are re-used as soft
> switches).
>
> I'm less familiar with the Laser 128--maybe the annunciators are
> still there...
>
> NadaNet uses annunciator 1 and PB 1 for output and input.
The signals listed in the 128 book for joysticks are:
1 - SW1 - game switch 1
2 - +5 volt
3 - ground
4 - reserved
5 - GAME0 - game paddle 0
6 - N.C. - no connection
7 - SW0 - game switch 0
8 - GAME1 - game paddle 1
9 - reserved