Hi All

I have started a blog series on creating a C64 system on an FPGA.

Here is the link:

http://c64onfpga.blogspot.co.za/2017/11 ... ction.html

Will keep you posted on new posts.

Subscribed!

Looks like a cool project. Good Luck! You might consider adapting my MCL65 core which has passed all of the tests you described and was used to power a Commodore VIC-20, Atari-2600, and an Apple II+.

http://www.microcorelabs.com/mcl65.html

Just published my next post. In this one I have decided to linger a bit on some Verilog basics, just to get everyone aboard:

http://c64onfpga.blogspot.co.za/2017/11 ... asics.html

Link for FPGA implementation of a C64 by Peter Wendrich.
T65 is another 6502 core; it's VHDL though. I'm using it for my Retro-uC and have a fork on my gitlab.

Hi Fatsie.

Thanks for the links. Very interesting project indeed.

One thing I am just curious about Wenrich's fpga implementation is that he mentions that the latest version he cannot release the source code because it contains source code from the Chameleon project.

Any idea what this project is about?

Turbo Chameleon 64 is an Altera EP3C25 FPGA along with RAM, crammed into a C64 cartridge.
It was originally a VGA output cartridge, but was so overpowered that many other features came along.
It can run standalone without being connected to a C64, it can even run an Amiga core.

Lots'a'links.
https://icomp.de/shop-icomp/en/produkt- ... on_64.html
http://www.syntiac.com/chameleon.html
http://wiki.icomp.de/wiki/Chameleon
https://www.c64-wiki.com/wiki/Turbo_Chameleon_64

And a video of it being an Amiga.
https://www.youtube.com/watch?v=kb-iT2LkrLs

Interesting!

I may have to port that to one of my FPGA boards (I have several of them because I maintain the P1V Virtual Propeller project on Github). I never had a C64

===Jac

The Turbo Chameleon sounds like an awesome device.

The only thing is it looks like the fpga design can only be used on altera fpga's because of some functional blocks incorporated in a binary.

Which sources are you looking at? As far as I'm aware, Turbo Chameleon is closed source.

The original FPGA64 project ran on a Xilinx Spartan-3
First paragraph on this page "History".
http://www.syntiac.com/c_one.html

I was following the following link from fatsie: http://www.syntiac.com/fpga64.html.

Newest version of fpga is only binary because it contains chamelon sources

I have just released my next post:

http://c64onfpga.blogspot.com/2017/11/s ... ystem.html

Just released my next post in the series:

http://c64onfpga.blogspot.co.za/2017/11 ... -fpga.html

In this post we develep the FPGA implementation capable of running the Test Suite.

Just an update. I released two posts since my last notification in this thread:

http://c64onfpga.blogspot.com/2017/12/p ... ortex.html
http://c64onfpga.blogspot.com/2017/12/b ... ystem.html

Just watch out that casex doesn't bite you in the ****.

It's designed to match on an UNKNOWN condition, and can lead to problems in the synthesized design that never show up in simulation.
This paper give a good explanation of the issues with casex (page 9).
http://www.lcdm-eng.com/papers/snug99_rtl_coding.pdf