Re: Apple ][ to VGA monitor adapter board - looking for best color decoding method

[ferdimh@gmx.de]

On 10 Apr., 13:39, sicklittlemonkey <Nick.Westg...@gmail.com> wrote:
> On Apr 10, 2:02 pm, "Michael J. Mahon" <mjma...@aol.com> wrote:
>
> > It takes a peek into the future to know that the next pixel will
> > extend the current color
>
> Not if output lags input by 1 bit.
>
> Emulators have done this in a reasonable manner for years with various
> algorithms, so I don't see why the hardware solution we've all been
> waiting for should be so much more limited.
>
> Anyway, no-one else is complaing, so I guess I've had my say. ;-)
>
Well, one needs to peek further into the future. The next pixel says
whether the dot is green or white. But the dot after the "violet" dot
determines whether this is a green dot or a green line. So one need to
look 2 bits into the future. And in DHIRES this becomes 4 bits.
This makes the amount of data explode - there are way to many
combinations.
I might be able to handle that on a second board but it is not going
to fit on the present card. It barely fits how it is designed yet.


Ferdinand