Re: CRT TV as monitor working backwards

[Michael J. Mahon <mjmahon@aol.com>]

KP <kjpmail@gmail.com> wrote:
> I plugged a IIgs composite-out into the composite-in on a 13" CRT
> Sharp TV.  Much to my surprise, I was shocked that, when put in
> GRAPHICS mode (lo-res, hi-res, any res), the picture is crystal clear
> (including the text portion of the screen in GR or HGR mode).
> Likewise much to my surprise, I was further shocked that, when put in
> TEXT mode, the text is ludicrously fuzzy and blurred.  The latter
> effect disappears when I reduce the COLOR setting on the TV to 0.
> 
> See, I thought that the composite out was supposed to be super clear
> in text mode, and that it was the graphics modes that were supposed to
> struggle.
> 
> This is a Rom 01, if that matters.  I just don't know what's going
> on.  I was expecting portions of the experience to be uncooperative,
> but I had expected the opposite problem from what actually happened.
> 
> Is this normal?

Composite out on a IIgs is *completely* different from the composite out on
8-bit Apples. 

The IIgs is natively an RGB machine, with composite being approximately
synthesized. 8-bit Apples are native composite machines, with typically
non-native RGB behavior. In fact, the IIgs converts the native Apple II
composite signal to RGB in an approximate way, then back-synthesizes its
composite output from that!

Any analog CRT NTSC monitor will be free of the resampling artifacts that
typically plague LCD monitors. Of course, the bandwidth of the luminance
signal, so critical for sharp text, will usually be severely compromised. 

For a IIgs composite signal, YMMV. 

-michael - NadaNet 3.1 and AppleCrate II: http://home.comcast.net/~mjmahon