Re: mmu for 65c02

From: A. Fachat (
Date: 2005-04-28 10:03:00

fachat wrote:

>On Tue, Apr 26, 2005 at 11:17:53PM -0500, Jim Brain wrote:
>>The only thing I think of doing is to stretch the cycle during a page 
>>fault to the maximum allowed and use another processor to do something 
>>during the time you have.  Or, if the processor is static, simply stop 
>>the CPU and use another to map the page in. 
>Yes, I think this is the only way. Only for the 6502 you have to queue
>the write accesses as they cannot be stretched, right?
Just got another thought - you mean not to stop the CPU with "RDY" (like 
I thought) but to
really make the clock cycle longer, stretch it? Maybe that would do it, 
although I doubt
that there is enough time (if the CPU is not static) to page in 
something e.g. from disk.


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