denli wrote:
@omnicron10
C-One isn't open source and, I suspect, neither will Clone-A be.
And the C-One is also bigger than the Minimig.
Although you were addressing Omnicron10, I'll answer this first-hand: The C-One was always open to a degree where other developers could take part in further development.
The schematics of the mainboard were open from day one:
http://c64upgra.de/c-one/tech/c1schematics.pdfand the schematics of the extender card have been opened even before the board was delivered, you might want to call it "day minus 5" ;-)
http://c64upgra.de/c-one/tech/c1_extender_schem.pdfI have just updated some info in the extender schematics yesterday, as I have changed the type of capacitors in the audio output stage.
Since the C-One has a fairly complicated topology, Tobias made example sources and IO bridges for other FPGA coders. The GBridge allows using all the IO hooked to the 1k30 from the 1k100 side, so you don't have to worry about inter-chip communication. The whole system appears like a single FPGA with that.
The first person to make use of that was Peter Wendrich, who made a C64 core. I should say "the" C64 core, as we have put quite some time into making this cycle-exact, and today, it's superior to many C64 software-emulators. The C64 core was open-source until release V0.27, and the current one is closed until the Chameleon is out and selling. All our findings about the C64 will be open, not only in source, but also in clear-text documentation. You will be surprised at how much documentation about the C64 out there is wrong!
The Minimig core port for the C-One already includes Jakub Bednarski's changes, and the source is open. While the ARM board for the Minimig board looks cool, the C-One sports another 68000 processor in place of the PIC. This already gives lots more performance on that part, and still, the FPGA space is only used to about 65%. Yes, you can expect updates from our side, and as GPL requires, this will be open-source. Anyone who makes an FPGA board with all the kind of IO that the C-One has will be able to use our mods on his board.
Jens
