Re: Alternative Methods of Copying Apple II+ ROMs

[Eric Smith <eric-no-spam-for-me@brouhaha.com>]

"Bryan Villados" <news003@macgeek.org> writes:
> Sorry if I'm being a nuicance about this... A previous thread on the
> EUROPLUS is confusing me, which is why I started this thread. Quadrajet
> wrote the following awhile back:
> 
> "One thing different I recall about the Europlus was a few pad jumpers on
> the motherboard to change some timing from 60 Hz to 50 Hz AC power systems."

That is incorrect.  The output of the power supply is +/-5V and +/-12V
*DC*.  Aside from the power supply, nothing in the Apple cares what the
line frequency is.

The jumpers and bowties on the logic board control the video frame rate,
so that depends on which video standard you want to use, not the AC
frequency.  For instance, I'm in the US where we have 60 Hz power, but
I own some computers that produce PAL video at a 50 Hz frame rate, and
I have a Tektronix studio video monitor that will display PAL.  So all
of this is powered from 60 Hz but using 50 Hz video.