Re: Plus vs. Europlus...

[Patrick Schaefer <PSchaefer@epost.de>]

David Empson schrieb:

> There are bound to be internal differences which identify it.  I don't
> have a reference handy which describes it, but assuming it has PAL video
> output (which it should) then the master crystal frequency will be 14.25
> MHz instead of 14.31818 MHz.  The video circuitry layout is probably
> somewhat different as well.

The video circuitry itself is the same, conversion to 50Hz timing is
made by opening and closing a few solder jumpers. This is described in
the Apple II reference manual.

An Apple II Europlus generates NTSC video with 50Hz Timing. For PAL
you'll have to add a 
> (Apple also made a card which produced PAL output on an NTSC Apple ][+.)



> I'm pretty sure that the European IIe (and probably the ][+) generate
> PAL colour output.  I haven't tried hooking one up to my TV for a while.

True. A TV as a monitor (use the camcorder input at the front) works
fine.

> (The IIgs is NTSC-only, and the IIc I have here is a US model, so it is
> also NTSC.  They are the only ones I've connected to a TV in recent
> memory.)

European IIGS and IIc models generate PAL as well.


> > If it _is_ an Europlus, is that System fully PAL (50Hz, 312.5 scan
> > lines) or is only the color encoding in PAL?

As mentioned above, it is NTSC with 50Hz timing. Some of the newer TV
sets accept this signal (when a 3.58MHz color burst is present, NTSC is
assumed, with 4.43MHz PAL)


Patrick