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Re: 65816 as 6502 replacement?
- Subject: Re: 65816 as 6502 replacement?
- From: mdj <mdj.mdj@gmail.com>
- Date: Tue, 15 May 2012 20:22:00 -0700 (PDT)
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On Wednesday, 16 May 2012 00:19:20 UTC+10, Sean Fahey wrote:
> Sure, but why bother? Years ago, I changed out my accelerator's 65c02 for a 65802 dreaming of the next-gen 'enhanced and extended' instruction set software that was going to become available (but never materialized). There was zero improvement in performance compared to the original 65c02 and no benefits.
The only really tangible benefit is Merlin 16, which assembles quite a bit faster than Merlin 8 and has a much nicer editor. '816 code is more compact than equivalent 6502. However, this benefit is totally eclipsed by the benefit of an accelerator, and replacing the processor core in a Zip Chip is shall we say "non -trivial" ;-)
If you've got an original Transwarp, you can do both by replacing the Transwarp's CPU with an '816.
There's a lot of fun projects for people keen on this sort of thing. You could for example save a *lot* of precious memory space in the language card by recoding ProDOS in 816 assembler ...