Re: 50 / 60 Hz in Display control panel

[TWS <adoyson@nccn.net>]

Should be something like this:  Control-Open apple-Escape.

CONTROL PANEL/
MONITOR


Ken Schunk wrote:

> Thank you very much. Worked like a charm.
>
> Is there any on-line resource that lists the key combinations for things
> like this? I realize it's probably in the manuals, but since those didn't
> come with the computer... Guess my old Apple ][ knowledge isn't exactly
> paying off yet :)
>
> Ken Schunk
>
> Mitchell Spector wrote in message <10AUG199803242128@vax2.concordia.ca>...
> >In article "Ken Schunk" <kschunk@nycap.rr.com> writes...
> >
> >>I recently purchased an Apple IIgs, and I'm having one problem with it. I
> >>can't get it to display composite video correctly on most of the TV's that
> >>I have tried. Only an older B&W with a vertical hold control allows me to
> >>get a stable picture.
> >
> >    A plain RCA cable running between the back of the IIgs and your
> >TV (with 'Video IN' terminal) or VCR should work fine. It outputs a
> >composite video signal through the composite port (just below the
> >power plug) which is decent enough when it is emulating an older
> >Apple IIe, but in native mode your going to want an analog RGB
> >monitor for the GS's color and resolution. In either case, you
> >will get a stable viewable picture, just not necessarily the
> >nicest.
> >
> >>I noticed in the Display control panel that it indicates "50 Hertz".
> >>I also noticed that my emulator software says 60 Hertz. Just what is
> >>this 50/60 Hertz item, and would it have any impact on the composite
> >>video output?
> >
> >    That is the problem. North American (and Japanese) TV sets
> >operate at 60 Hz and the IIgs is sending a video signal at 50 Hz.
> >The vertical scanning frequencies don't match, which is what is
> >responsible for determining the refresh rate of your screen. TV's
> >and composite monitors seem to operate on a fixed frequency, so
> >sending them something they're not expecting is going to give an
> >unstable image, to say the least.
> >
> >    To fix this, turn on your IIgs while holding down the 'Option'
> >key (or if already on, press and hold down Option-Control-Reset,
> >while continuing to hold down the Option key after releasing
> >the others). When the menu appears, select option "2" by pressing
> >the 2 key. This is set the refresh rate back to 60 Hz, as well
> >as restore all the factory Control Panel settings. You may want
> >put them back, which can be done by repeating the above steps
> >and pressing "1"m or pressing and holding down Apple-Control-Esc
> >and then selecting 'Control Panel'.
> >
> >Mitchell Spector
> >spec@vax2.concordia.ca