6502.org

yea, I understand. same thing here. I have a lot of the old Avocet assemblers but not the avmac65 one. thanks for the answer.

Ken

You're welcome. Sorry I was unable to help. To be honest, it was worth it for the picture on the front of the box

Neil

edit: I note that even though Avocet Systems are listed as a supplier on the WDC page, their web page is absent (I think for at least a couple of years since I last looked) and the domain name available.

I did note that they recently updated the 65C02 and 65C816 data sheets.  Both are current as of earlier this year.

Y'know what I'd like? An updated version of Part 2 of Chapter 4 of Zaks' Programming the 6502, which discusses each instruction including the addressing modes and flags changed, but (obviously) for the 65c02. I don't find the equivalent part of the WDC book as simple to follow, because of the way it deals with the 16-bit variants of the parts. There's a kind of double indirection my brain has to do to work out what's doing which with whom.

Neil

Yes, the Eyes and Lichty. I can't put my hand on the Leventhal at the moment but I'm pretty certain it's a first edition.

In the meantime, I enjoy the (zp) which should have been there from the first, but still miss a stack relative addressing

Neil

is there an assembler for 6502, (and/or text editor) that is native to/runs on the 6502 itself?
Is there call for one?

Yes, in the land of Acorn. Easy enough to implement the Acorn MOS ABI too.

One that comes to mind is Orca/M.  Wikipedia tells a little about it, here.  I don't have any experience with it, but was made aware of it by someone at work almost 40 years ago, who was using it on the Apple II.

I have a rather extensive Forth kernel in the EPROM of my workbench computer, including an assembler that uses the regular mnemonic-operand order instead of how most Forth assemblers work, and I merge the addressing mode with the mnemonic, like LDA#, STA_ZP, etc., so it doesn't have to look ahead and parse.  It took me only an evening to write it, and after I did, I realized that because it runs in Forth, macro capability was automatic, without my having planned for it.  This assembler is not suitable for entire applications, only for writing Forth primitives, runtimes, ISRs, etc.; but as they say, you can get 90% of the performance of assembly language with only 10% of the code written in assembly, provided it's the critical 10%.  (I might not have the percentages right; but it makes the point.)

Many.

e.g. The Apple II mini-assembler built into the Integer Basic ROM. Also there is a ROM one that was part of the AIM-65 setup. I'm sure there were many other ROM ones.

Ed. has mentioned in the land of Acorn - BBC Basic has a built-in assembler and as it's Basic, then it's also an editor. It's a powerful macro assembler too - as macros are Basic procedures.

Another acorn one was the assembler that came with the Acornsoft BCPL system. Choice of 2 editors there.

There was another I used on the Apple II - TED ][+ I think it was called.

And I started writing one for my own '816 BCPL system, but gave up for many reasons - mostly because I was happy using a cross assembler under Linux.

It wouldn't surprise me if there was one for the various DOS/65 projects either.
Not sure... I suspect if there were, then there would be a portable one out there already...

-Gordon

Of course. Many have been written back in the days, including by me.

Mine runs on the C64 and uses the builtin (BASIC) editor to write assembly programs.