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PostPosted: Tue Jun 28, 2022 12:14 am 
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Joined: Mon Jun 27, 2022 11:54 pm
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Hi.

I'm preparing a series of videos on early video game cross-development. I have multiple old virtual environments that can run a lot of different software (ranging from a PDP-11 running RT-11 to a CDC Cyber 170/865 running NOS2), and am looking for e.g. the MOS shipped COMPAS 6502 Cross Compiler in some format, a listing, tape, punch card deck, doesn't matter. Failing that, looking for ANY 6502 cross compiler that could run e.g. on a PDP-11.

Has anyone preserved such an artifact?
-Thom


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PostPosted: Tue Jun 28, 2022 10:06 am 
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Joined: Thu Dec 11, 2008 1:28 pm
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Location: England
Welcome! A great quest - I think a challenging one. I'd recommend reaching out elsewhere too, if you haven't already: vcfed forums, classiccmp mailling list, retrocomputing stackexchange, Computer History Museum, Living Computers Museum, and so on.

I vaguely remembered something, and there are a few links within, but it's not quite what you seek:
from 1983: 6502 assembler with Lisp syntax
also maybe some pointers within
The COMFY 6502 Compiler

Please share any findings!

Edit: a list here with many cross-assemblers but none of them, I think, old enough
https://telarity.com/~dan/cbm/cross-development.html

Edit: BDD offers this mid-70s personal experience:
Quote:
Before any programming could be done, an assembler was needed. MOS Technology had a reference assembler that could run on some systems, but not on the IBM 370 mainframe that we had at the time. So one of our staff programmers studied the 6502 data sheet and wrote an assembler in FORTRAN, which worked well and was pretty fast.


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