68851 and other MMU's...

[bloodline]

Does anyone (Piru? :-D) know where to find programming info for the 68k MMUs? (or any MMUs for that matter!)

[Hyperspeed]

Hey, your picture looks like Guybrush Threepwood with his pants
down... or is it someone else?

:-D :-D :-o

Does the standard A1200 motherboard '020 have a MMU? I understand it's
the 68EC020 so does this mean no MMU or no FPU - or neither?

Why did Amigas never implement parity or ECC like in Unix servers?

[Piru]

www.motorola.com Product Library Search
32-Bit Embedded Processors
68K/ColdFire
68K M680X0

851 MMU: MC68851UM
030 MMU: MC68030UM
040 MMU: MC68040UM
060 MMU: MC68060UM 

[Piru]

Does the standard A1200 motherboard '020 have a MMU?

No.

I understand it's the 68EC020 so does this mean no MMU or no FPU - or neither?

No. For 68020 EC means it has 24bit address bus, not 32bit. No 68020 model has built-in MMU or FPU.

Why did Amigas never implement parity or ECC like in Unix servers?

Because parity/ECC memory was (and is) expensive and not needed for games machine.

[bloodline]

Cheers Piru, I should have thought of that :-D


Yes, my avatar is Guy.brush ;-)

[Cymric]

Try the MC68851 and MC68030 programming guides; they have proper explanations and lots of pseudo code. Avoid the MC68k-family programming guide which lists all the mnemonics.

[bloodline]

I'm reading the 060 MMU guide.. and it's going over my head :-(