The 100 MHz 6502!

Disk drives, Monitors, SuperCPU etc.
RobertB
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The 100 MHz 6502!

Post by RobertB »

And the 65F02 works with a Commodore PET 8032! Think if it were modified for other Commodore computers! See

http://www.e-basteln.de/computing/65f02 ... st-systems

Truly,
Robert Bernardo
Fresno Commodore User Group - http://www.dickestel.com/fcug.htm
Southern California Commodore & Amiga Network - http://www.portcommodore.com/sccan
Nov. 6-7 Commodore Los Angeles Super Show 2021 - http://www.portcommodore.com/class


rmzalbar
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Re: The 100 MHz 6502!

Post by rmzalbar »

Interesting. I'm also pretty excited about the "Buffee" drop-in 68000 accelerator project. Somewhat similar concept, although ARM-based rather than FPGA.
Smooth operator
RobertB
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Re: The 100 MHz 6502!

Post by RobertB »

Juergen has given me permission to post his responses to me.)

Fri., Oct. 15

Many thanks for reaching out! Yes, I have been thinking about supporting the
VIC-20, which should be a more realistic proposition than the C64 (with its
6510 and memory banking trickery...)

But I will probably look into an upgraded version of the 65F02 first, most
likely based on the Spartan-7: As I add more host computers, I am running
into timing bottlenecks in the FPGA. The address decoder (which has to
decide when to route a bus access to the fast internal RAM or to the
external bus) sits on a timing-critical path, and starts to get in the way
of 100 MHz internal operation. I could also do with the larger RAM available
in the Spartan-7, to properly support bank-switched host designs.

Since the Spartan-7 pinout is quite different from the Spartan-6, and it
also needs different supply voltages (and one more), this means a complete
redesign of the PCB. So it will take a while, unfortunately. But looks like
a good winter project, so I hope to get it done eventually!

Sat. Oct. 16

To avoid creating false expectations, it is probably worth adding that the
chances of making the 65F02 available to a broader audience are
unfortunately pretty slim. I have explored options last year to have it
produced in quantities of 100 or so, and found that

(a) The numbers don't work out; the 65F02 would need to be more expensive
than people expect.
(b) Since I am based in Europe, the compliance hurdles are a pain in the
neck. (EMC measurements, anyone?)
(c) Managing the production and distribution would not be fun at all --
certainly not my idea of a hobby, and a job I already have...

Hence, while I very much appreciate the interest and the feedback, I don't
want to create expectations that this will be available on Tindie or
elsewhere any time soon. And on the other hand, the required BGA soldering
will unfortunately mean that only very few hobbyists could build their own
65F02.

Best regards,
Juergen
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