Re: 'Frankenstein' Disk Drives, Done Cheap

> Still, it would have to be "reasonably priced".

That's the kicker for me, as well.  When I was thinking about a CPLD, I was
thinking VERY reasonably priced... because online SystemVerilog source is
"free", and (unless I am mistaken) relatively portable.




On Wed, Apr 23, 2014 at 8:38 AM, Pete Rittwage <peter@rittwage.com> wrote:

> On Tue, April 22, 2014 9:20 pm, Clockmeister wrote:
> >
> > On 23/04/2014 8:40 AM, Julian Perry wrote:
> >> Re: 'Frankenstein' Disk Drives, Done Cheap While we're on the subject
> >> of modern takes of old Commodore, kit, THIS PROJECT - C64 Reloaded
> >> <http://wiki.icomp.de/wiki/C64_reloaded> - is a novel idea.
> >>
> >> It's basically a redesigned C64 board, fully populated, sans Processor
> >> and SID. It has a couple of interesting points.
> >>
> >> 1: it has no RF modulator, only an Svideo output. Since the RF
> >> modulator is responsible for the chroma signal bleed into the
> >> luminance signal, it would be interesting to see what the video output
> >> quality is like - and whether the circuit can be easily adapted to
> >> existing boards.
> >> 2: One of the design simplifications was to run off a single 12VDC
> >> supply, and generate all voltages from this one source. In particular,
> >> the 9VAC is needed both with early breadboards (which used this to
> >> generate the VIC VCC), and for ALL units to generate the power for the
> >> tape drive, and external power for the USER port. The AC component was
> >> used to generate the clock signal for the TOD pin in the 2 6526 CIA's.
> >> Jim, amongst many others would be very interested in seeing how this
> >> has been accomplished in this board.. the component count looks quite
> >> small.
> >> 3: there is provision for a workaround for silent memory corruptions
> >> caused by memory refresh glitches, when fooling around with the VIC
> >> chip timing (a technique called VSP). Having witnessed the problem
> >> first hand (and "fixed" it by retrofitting NOS RAM in my own machine)
> >> - I'd like to know how this has been achieved.
> >>
> >
> >
> > Certainly some points of interest in terms of the items you outline and
> > using them for the classic board, but no interest in terms of purchasing
> > it.
> >
> > I'd rather stick with an almost infinitely repairable classic board with
> > all through-hole technology myself, particularly since I have already
> > fully socketed a couple of boards.
> >
>
> I would much rather see something where I transfer the chips to a much
> more capable board, not a reproduction of the old one.  I don't have
> problems finding original boards that still work... there's still millions
> of them in the US.
>
> Something with full 1541 emulation from SD, multiple SIDs, removal of AEC
> lines from video output, standard power supply, regular serial/parallel
> ports, etc.
>
> Still, it would have to be "reasonably priced".
>
> -Pete
>
>
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