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Forums > C64 Coding > UXN Instruction Set
2023-07-24 14:33
rupy

Registered: Mar 2020
Posts: 45
UXN Instruction Set

What would you miss most from the C64 instructions?

http://move.rupy.se/file/uxn.png
 
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2023-07-26 00:39
Bansai

Registered: Feb 2023
Posts: 54
Quoting rupy
So UXN is the JVM of "6502"-level (8/16-bit) instruction sets?
Eric Chahi's game "Another World" might provide some useful lessons learned wisdom regarding the design of such machines:
https://fabiensanglard.net/anotherWorld_code_review/

Regarding compilers, the expression handling portion of a basic shift-reduce parser (e.g., an operator precedence grammar) should be able to decompose arithmetic expressions into a stack-based form quite easily. I couldn't see myself programming a stack-based ISA unless--at least initially--I had a rich set of macros at my disposal, mainly so I could avoid push/pop misalignment mistakes.
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