[sdiy] A little OT - C64 in a box

[Loscha]

I have a C64 Dtv.
The schematic is on this page --> http://www.kahlin.net/daniel/dtv/colorfix.php

The sound quality is, to be honest, very tinny. That would happen with
not having filters on a digital pure waveform synth.

 Most will know, but, some won't: The Commodore 64's SID Chip was
designed by Bob Yannes, who later went on to found Ensoniq.

 The Ring Modulators don't work properly, either. Mostly because the
output of the three channels of sound are output to three different
pins. his doesn't allow 1-2 2-3 3-1 Ring modulation like on the real
thing.

 However, that said, they are fun to play around with, and to try to
explore the hidden features. A warning on them to people in Phase
Alternating Line countries vs Never The Same Color countries -- the
ROMs are different, and a lot of the Demos on the machine appear in
the directory, but, will not run on a PAL machine.
 This is completely at odds with the _real_ demoscene out there, which
is almost exclusively PAL from the demos I've seen (Dane @ Booze
Design!!!)

ranting,
-Loscha

On 11/24/06, Nicholas Gregorich <nicksdsu at mac.com> wrote:
>
> On Nov 23, 2006, at 4:17 PM, Tim Parkhurst wrote:
>
> > So I stumbled across this the other day
> >
> > http://en.wikipedia.org/wiki/C64_Direct-to-TV
> >
> > And there are several links at the bottom that describe how to turn a
> > cheesy "Hummer Off-Road Challenge" video game into a cheesy working
> > Commodore 64. Apparently, this game has C64 guts on a chip (or two),
> > and there are even pads on the PCB for adding keyboards, joysticks and
> > floppy drives. The results will run C64 programs and games, and even
> > has the Commodore BASIC in it. I haven't done too much research, but
> > it sounds like the built-in sound chip is not quite the same as the
> > infamous SID chip (not the same filter?), but it still could be fun
> > for hacking. I even found a local Radio Shack that has a few of these
> > on hand (about $18US each). Anyway, thought it might be fun to pass
> > along. Anybody had any experience with this hack?
> >
> > Oh, and HAPPY THANKSGIVING to those in the US, and HAPPY GENERIC DAY
> > to our friends outside the US of A.
> >
> >
> > Tim (in charge of the turkey this year... it will have LEDs) Servo
> > --
> > "Imagination is more important than knowledge." - Albert Einstein
>
> Didn't she implement the C64 on an FPGA?  Cool, but you're right,
> without the filter it may not be that useful in SDIY land.
>
> Hmmmm, you're not cutting edge unless you're cooking your bird with
> [infared] LEDs.  ;)
>
> Nick.
>


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