ARM itself is proprietary though, and also I'm not sure there are ARMs as simple...

pjc50 · on May 24, 2019

All the retro platforms were proprietary, though? Can't get much more proprietary than Nintendo.

Cortex-M0 is very comparable to a 68k with 32-bit registers. http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc....

zzo38computer · on May 25, 2019

Many old Nintendo systems are now well documented and you can potentially make a fully non-proprietary hardware clone and software tools.

AnIdiotOnTheNet · on May 25, 2019

Retro platforms were current technology. If I'm going to use technology with several orders of magnitude less power, then I'd at least like it to be open, is all I'm saying.

monocasa · on May 24, 2019

I mean, everything is propeitary then. Even SiFive has issues publishing their preboot code. https://www.bunniestudios.com/blog/?p=5127

And a ARM CortexM0 is about 12k gates, it's hard to get much simpler than that.

AnIdiotOnTheNet · on May 24, 2019

> I mean, everything is propeitary then.

Yeah, that's precisely the problem. Though you're right, the M0 at least does fit what I'm talking about pretty well, in-order, no-MMU, etc.

monocasa · on May 24, 2019

So what, you just don't code for hardware at all?

AnIdiotOnTheNet · on May 25, 2019

If I'm going to use technology with several orders of magnitude less power, then I'd at least like it to be open, is all I'm saying.