Re: [hatari-devel] Adding cache support for the MegaSTE

[Nicolas Pomarède <npomarede@xxxxxxxxxxxx>]

Le 13/07/2024 à 10:52, Christian Zietz a écrit :
> Nicolas Pomarède schrieb:
>
> > yes, I forgot to reset the counter before this test, so it adds time
> > with the previous one :(
> >
> > This is fixed in attached prg.
>
> Updated screenshot attached. For the second screenshot, I have patched 
> your program to write words, read *bytes*, to show the effect of cache 
> hits when reading bytes.

good idea ; I added a test for this in attached PRG, if you can run it 
we will have all the results in one screenshot

> Also, I have written down what I know about the MegaSTE cache (which is 
> quite a lot 😊): https://1drv.ms/w/s!Am5VuMj7zWGzoEnKTsA4TLgXy6Bm.
> Note that given the lack of official documentation this document was 
> derived by reverse-engineering and logical reasoning.

thanks for taking the time to write this doc ; I found some old emutos 
discussion where you wrote about megaste cache and emptying it (buserr, 
bus grant, ...), having everything in a single doc is very handy

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