Re: 6502 core / 128 mode (re: J-Board) (fwd)

From: Andre Kaesmacher (andre_at_kaesmacher.de)
Date: 2001-03-11 12:07:19

jbevren@starbase.globalpc.net schrieb:

> On Sun, 11 Mar 2001, Andre Kaesmacher wrote:
>
> >
> > Acorn's ARM-Cpus are also a good Example, of how to enhance a
> > 6502 without going the "65816-Way".
> >
>
> Andre, you're speaking about the thumb16 subset inside the arm32 cpu/core?
> I think it's a great invention myself, but could you explain some about how
> it could be applied to teh 6502?
>

It's not Pin-Compatible and also not Opcode-Compatible.

However, most of the ARM-Instructions seems to me like
6502-Instructions nicely squeezed together.

The early Acorns (Atom, Electron) used 6502 Cpus,
the ARM-Cpus were surely developed with 6502 in Mind.

Andre Kaesmacher

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