GARTHWILSON: Oh, good grief! I did not intend negativity about 65816 - only that 65Org32 has superior interrupt performance. As one of the strongest proponents of 65816, I'm surprised that you haven't switched. Assuming that your system doesn't use hooky opcodes, PHI2 out, /SO or the alternate bus ...

GARTHWILSON: Oh, good grief! I did not intend negativity about 65816 - only that 65Org32 has superior interrupt performance. As one of the strongest proponents of 65816, I'm surprised that you haven't switched. Assuming that your system doesn't use hooky opcodes, PHI2 out, /SO or the alternate bus ...

... bus has minimal gain unless all pieces of data are bus width aligned. Indeed, this would explain your hesitance with W65C816 and your advocacy of 65Org32.
I'm not sure what you're thinking of. I very much like the '816, although Bill Mensch could have made it better if Apple hadn't needed it to ...

... bus has minimal gain unless all pieces of data are bus width aligned. Indeed, this would explain your hesitance with W65C816 and your advocacy of 65Org32.

You may not have set the interrupt criteria with the gravitas that I have accepted. Regardless, it is a question worth answering, partly for ...

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 ...

(Would be good to see this reinvigoration of 65Org32 in a new thread, Sheep64)

Apologies for delay. I discovered 65Org32 and I've been implementing it. See viewtopic.php?f=1&t=1419&p=78332#p78332 for details.

I had a flash of inspiration and I've been implementing a 65Org32 emulator in C. I'm presently working on an assembler.

It is possible to place four 8 bit opcodes into one 32 bit instruction fetch. In this regard, it is very much like Charles Moore's C18 processor or Seymour Cray's CDC6600, although ...

... to the I/O.


Apparently speed is not much of a concern though, if you're going to emulate it on an AVR. I myself have threatened to emulate my 65Org32 with a PIC microcontroller (just because that's what I'm experienced with). It would be slower than a seven-year itch with 14 years to scratch ...

... and discouraged that I have vaguely conventional ideas but that my predecessors have not been wildly successful. I was previously unaware of 65Org32. I was only aware of 65Org16. Indeed, I laughed outrageously when I discovered 65Org16. You guys know how to have good, clean fun! The most common ...

... has even used the (DP,X) addressing mode to reference I/O to great advantage.

65Org02 is notable for implementing a 64 kiloword zero page.
The 65Org32 is my baby. Address bus, data bus, and all registers are 32-bit, including the base-page register, and all operand words are 32-bit, including ...

... threads linked in the index post (linked above by Garth)
http://forum.6502.org/viewtopic.php?f=1&t=4216

Edit: I am of course quite fond of the 65Org32 idea - it's inefficient but it's straightforward to define and build. And the OPC machines have been great fun and are also relevant here:

Our ...

... to be a drop-in replacement for a regular 6502.
it still is helpful to see what people would want in a CPU, especailly on the threads around the 65Org32.
though for obvious reasons i cannot implement anything, though i got future plans for a 16 bit 6502 based CPU, but that'll take some time and i ...

... exception would be the status register which might do fine with 16 bits. We've been through that before though, in the topic that turned into the 65Org32 topic, at http://forum.6502.org/viewtopic.php?f=1&t=1419 .

As I recall, there was a good possibility that Apple (or was it a different company ...

... exception would be the status register which might do fine with 16 bits. We've been through that before though, in the topic that turned into the 65Org32 topic, at http://forum.6502.org/viewtopic.php?f=1&t=1419 .

As I recall, there was a good possibility that Apple (or was it a different company ...