Re: Apple IIgs RBG -> Amiga 1080 monitor

["Dan Ponte" <dcp490NOSPAM@yahoo.com>]

"vector" <abuse@aol.com> wrote in message
news:Xns932A86174F2B04659DC714424035B979@216.166.71.230...
> dcp490NOSPAM@yahoo.com (Dan) wrote in news:27345b77.0302211413.1de44ae4
> @posting.google.com:
>
> > Hello all.
> > I have a Commodore 1080 monitor and an Apple IIgs. I was wondering if
> > is was
> > possible to hook up the IIgs to the 1080. It seems possible as they
> > both use 15Khz scan frequency. Does anyone have the pinouts for a
> > cable?
> > Thanks,
> > Dan
> > --
> > Remove the 'NOSPAM' to reply
>
> The C-1080 is a DB-23 connector, nicht?  (Leave me alone, old skool
> electronics people.  The "DB" naming convention won out for standard
> usage.  If Radio Shack doesn't make a distinction between DB, DE and
> whatever other styles, I don't have to either.)  I think the cable should
> be wired as follows:
>
> DB-23        DB-15
> pin 3 ------ pin 2  (analog red)
> pin 4 ------ pin 5  (analog green)
> pin 5 ------ pin 9  (analog blue)
> pin 10 ----- pin 3  (composite sync)
>
> pin 16 ----- pin 1  (ground, red?)
> pin 17 ----- pin 6  (ground, green?)
> pin 18 ----- pin 13 (ground, blue?)
>
> It's the Amiga side I'm not sure about.  In all the pinouts I've seen for
> Amiga 23-pin video connectors, pins 16-20 are only labelled "ground",
> never "red ground", etc, whereas they're explicitly labelled in the IIgs
> pinouts.
>
> I was looking into all this to evaluate whether an Amiga scan doubler
> could be used on a IIgs.  Software Hut has told me that a hardware
> redesign would be needed to make the ToastScan work in such a
> configuration, but I think that was said more because they weren't
> familiary with IIgs video and didn't care to be, either.  I still believe
> it would be possible out-of-the-box, given the proper adapter and/or
> cable.  If you're an Amiga guy and have a scan doubler laying around and
> then get around to building this cable, pretty please with et cetera on
> top let us all know how that works out for you.  There's been talk of
> using the Amiga scan doublers for a long time, and while I've never seen
> anyone offer an reason why that setup wouldn't work, I've also never seen
> anyone actually try using an Amiga scan doubler, either.
>
> Tsch��--
> v
The 1080 has a DB9 female connector, actually. I do have a DB-23 ->DB-9
cable (the AMiGA's video connector is DB23) for use with the amiga, but I
have read that the 1084(with a DB23)'s pinout is different in some respects.
Dan