Re: Supercard

["mdj" <mdj.mdj@gmail.com>]

Michael J. Mahon wrote:

> Because the objective of this mode is to faithfully simulate
> what a typical analog NTSC monitor would do--and that's what
> they do.

It's very tricky simulating the artifacts correctly, that's for sure.

> > You mean to cutoff only for color modes not monochrome ?
>
> That would be an option, though AFAIK only the Applecolor Composite
> monitor actually switched the luminance channel to higher bandwidth
> when it was in monochrome mode.

There was little discernable difference between this and a normal
monochrome display too - the dithering effect caused by the raster
spacing in monochrome mode was pretty much enough.

> If an S-Video input is used with a digital TV, then some monitors
> will use the full bandwidth of the luminance signal, since no chroma
> separation or filtering is required.

Any high quality TV with S-Video input does a pretty fair job of this.
Connecting the Apple II video straight to the luma of the svideo input,
and to the composite input lets you use the input switch on the TV much
like the mono/colour switch on the AppleColour displays.

> However, digital monitors are a different breed than the monitors that
> the Apple II was designed for, and, more importantly, than all the
> color graphics for the Apple II were designed for.

I've yet to see an emulator get it even close to correct - trickery
like displaying grey in hires is very poorly emulated as a general
rule, and it'd be best done in software before attempting to do it in
hardware.
 
Matt