Re: mmu for 65c02

From: A. Fachat (
Date: 2005-04-29 14:42:49

Jim Brain wrote:

> A. Fachat wrote:
>> 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
> Yes, that was my thought, and yes, there is probably not enough time 
> to page RAM in from disk.  If all that was needed is to page another 
> bank of RAM into the limited address range, you might be able to 
> stretch long enough to do that.

I just looked up the cycles times for the 6502 - you'd have to stretch 
the first half cycle, that doesn't have any timing restrictrions. The 
second half must be close to half the "normal" cycle time.

Anyone tried that?


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