8-bit Computer TV Channel Use
snhirsch at gmail.com
Sat May 23 12:28:39 CDT 2015
On Sat, 23 May 2015, Chris Osborn wrote:
> On May 23, 2015, at 8:24 AM, Mark J. Blair <nf6x at nf6x.net> wrote:
>> In the middle will be some FPGA to perform any necessary magic. I've
>> been looking at a prohibitively expensive ($115) one that has enough
>> dual-port RAM blocks to support a frame buffer.
Getting an acceptable combination of crisp 80-column text and proper color
aliasing from a converter is decidedly non-trivial. I own one of just
about every commercially available (and hobby) converters and precisely
none of them provides a universal solution. Some give great displays from
an Amiga and suck for anything else. Of my two (pricey) CVP CM-345S
converters, only one provides useable display from an Apple IIGS. My
GBBS-8220 can occasionally be coaxed into giving a solid display from a
Color Computer 3. The list goes on...
> Are you on the CoCo mailing list? Have you seen the RGB2VGA by Luis
> Antoniosi (CoCoDemus)? I know at one point he had been tinkering with
> making it support composite from the Apple II. It’s semi open-source, I
> think there are 2 versions and the latest version is currently all
> closed source.
Luis's converter comes the closest to providing usable display from an
Apple II, but (for me at least) only with certain levels FPGA code.
Still, he is putting a huge amount of effort into the project and I have
high hopes this may be a robust one-size-fits-all solution.
If transparent, tweak-free emulation of a classic CRT display were easily
doable, it would have been done by now.
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