Re: Zip Chip programming info / disk image?

[bieling@terra.es (Jorge Chamorro Bieling)]

mdj <mdj.mdj@gmail.com> wrote:

> 
> My knowledge of the Apple II's internals isn't that deep, but it would
> seem to me you could achieve DMA compatibility by invalidating the
> cache when RDY was pulled, since this normally only happens during DMA
> - the reason a Zip Chip ignores it

I think the purpose of RDY is to halt the processor until the next cycle
to allow accessing slower (than the bus speed) devices. 

I can't see what does this have to do with achieving DMA compatibility ?

-- 
Jorge Chamorro Bieling