Re: 256 Color on Apple II+?

[anoneds@netscape.net (Ben Yates)]

"Bryan Parkoff" <bryan.nospam.parkoff@nospam.com> wrote in message news:<fNvvc.37083$mQ4.18889@fe2.texas.rr.com>...
> Is it possible to support 256 colors on Apple II+ by using video
> controller card?  You would have to build IC board to make controller card
> from scratch.  256 colors will be stored on location from $1000 through
> $E200 (like HGR from $2000 through $3FFF).
>     Will it allow the assembler programming code to tell the softswitch like
> $C080-$C08F to read aux memory rather than main memory through video
> controller card's memory chip before aux memory will display in the screen.
> It looks identical to Nintendo 8-Bit that main memory and aux memory are the
> optional to use switches back and forth.
>     Do you think that video composition can handle 256 colors at higher
> frequency?  Please let me know what you think this idea.


Why not use a video display processor that has it's own memory to
maximize CPU memory for applications? Like the Yamaha 9938 or 9958?
There are FPGA's for these chips now, and the 9938 supports 256 color
512x212 (424 interlaced) resolution out of 512 color palette... And it
supports up to 192k VDP memory.

Ben