Linked by Thom Holwerda on Fri 30th Mar 2012 22:13 UTC, submitted by kragil
Linux "It is common to see newbies asking in microcontroller forums if they can run Linux on their puny little 8-bit micro. The results are usually laughter. It is also common to see, in Linux forums, asked what the minimum specs for Linux are. The common answer is that it requires a 32-bit architecture and an MMU and at least a megabyte of ram to fit the kernel. This project aims to (and succeeds in) shatter(ing) these notions. The board you see on the right is based on an ATmega1284p. I've made one with an ATmega644a as well, with equal success. This board features no other processor and boots Linux 2.6.34. In fact, it can even bring up a full Ubuntu stack, including (if you have the time) X and gnome."
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AtMega MMU
by Alfman on Sat 31st Mar 2012 00:59 UTC
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I suspect that adding a real MMU (with external memory) would be both easier and more efficient than emulation.

As an academic exercise, I congratulate him on the accomplishment. But honestly the project would have had more potential had it gone the route of adding an MMU to the AtMega and creating a bona-fide linux port. Obviously nobody is going to seriously run an ARM emulator on an AtMega there's just no use case for that.

Reply Score: 3

RE: AtMega MMU
by AdamW on Sun 1st Apr 2012 07:19 in reply to "AtMega MMU"
AdamW Member since:

it doesn't even accomplish much as an academic exercise. As the first poster points out, all he's done is 'prove' that the processor in question is Turing-complete, which we already knew.

The slowest and simplest Turing-complete computer in the universe can emulate the fastest and most complex, given enough time. It's a perfectly well-understood principle and has been for decades. Hence, well, the name.

It'd be nice if we could get a moratorium on all these 'hey look I ran an emulator on some hilariously underpowered processor and three days later it booted Windows / Linux OMG OMG!''s getting kind of dull.

Reply Parent Score: 4

RE[2]: AtMega MMU
by Bill Shooter of Bul on Sun 1st Apr 2012 22:16 in reply to "RE: AtMega MMU"
Bill Shooter of Bul Member since:

It should be noted that he didn't just run an emulator on some hilariously underpowered processor, he wrote an emulator on some hilariously underpowered processor. That makes it impressive.

Reply Parent Score: 3