There are at least 10 groups who have proposed a 32 bit extension or larger. This would include 65k, 65000, 65020, 65GZ032 , 65Org32 , 65832 , 65E4 , 65m02 and tentative steps separately from Proxy and I to extend 65CE02. It is apparent that many of the proposals have common themes and they typically ...

... by-6502 design with FPU extensions?

My project appears to be almost a strict subset of André Fachat's 65002. I have also seen reference to 65GZ032 but it appears to have been run from a Yahoo mailing list which fell dormant before it was deleted. I was previously unaware that 65GZ032 was ...

... here about extending the 65's to 32-bit, although the only effort I know that has made it to working hardware (although never finished) was the 65GZ032. That one had a 6502 emulation mode but in its native mode hardly looked like a 6502, having gobs of registers, deep pipelining, branch prediction ...

... operands that are no more than about 23 bits (I don't remember exactly), this works ok. For wider ones, he uses a bit in the op code to tell the processor to fetch the next word as a 32-bit operand. (I hope I'm remembering correctly.)

Other 32-bit 65's I'm aware of are the 6502EX and the 65GZ032 .

... earlier efforts, particularly the 65832 design which was finished by WDC but never put into production, and Gideon Schweitzer (sp?) and friends' 65GZ032 which was actually running but still needed various things worked out. These had design goals of still being able to run already-assembled 6502 ...

... to a virtual-capable design without breaking existing code for the simpler one, or complicating the hyper-visor unnecessarily. It appears that the 65GZ032 (linked on your page) was close to completion, but stopped short of providing a complete picture of how the mode-switching mechanism worked ...

... to a virtual-capable design without breaking existing code for the simpler one, or complicating the hyper-visor unnecessarily. It appears that the 65GZ032 (linked on your page) was close to completion, but stopped short of providing a complete picture of how the mode-switching mechanism worked.

My ...

... is to retain the 6502/816 flavor and make a truly 65-family processor with a lot more computing power. I have lamented that other efforts like the 65GZ032 which, although never finished, did have working hardware, was really a RISC with very little resemblance to the 6502 except in emulation mode. I ...

... viewtopic.php?f=10&t=2653 which is to be able to run legacy 6502 code. Another I am aware of but its Yahoo forum seems to have disappeared is the 65GZ032 work which they did actually have working hardware on although it was not finished the last I heard and the job was put in hybernation. BigEd can ...

... php?f=9&t=1505&p=9705#p9705. There's an example shown there where the '816 does in two instructions what the 6502 takes ten to do.

There was the 65GZ032 project with its own Yahoo forum which was for a modern 32-bit processor that could still run old 6502 code. It had a ton of registers, deep ...

... individual opcodes? Perhaps some software suite that I can check my code against?
André Fachat, if you are reading this-- Do you know if the 65GZ032 group dissolved? I remember someone on the 65GZ032 Yahoo forum posting a link to an 6502 instruction-testing program, but I just went to try to ...

I remember someone on the 65GZ032 Yahoo forum posting a link to an 6502 instruction-testing program, but I just went to try to find it, and I can't even find the group. I too feel the urge to test this. My take is that, per signed notation,

11111111 is negative 1
00000001 is positive 1, and ...

... individual opcodes? Perhaps some software suite that I can check my code against?
André Fachat, if you are reading this-- Do you know if the 65GZ032 group dissolved? I remember someone on the 65GZ032 Yahoo forum posting a link to an 6502 instruction-testing program, but I just went to try to ...

... deep pipelining, branch prediction, onboard cache, etc., and end up with something has has little to no resemblance to the 6502 or '816, like the 65GZ032 project went, and, after a lot of progress and even some working hardware, still fizzled out before it was done.

I might still see having direct ...

To answer some more points:
I fount also 65GZ032. Any comments on this? DMIPS? Code density? Is the code available for free?
For this, and for pointers to some other variations on the 6502 theme, and for André's own 65k project, have a look at his pages here . His project allows for 32bit, and more ...