Re: [hatari-devel] MMU 030 question

[Toni Wilen <twilen@xxxxxxxxxx>]

> I get the following messages with both of them :
>
> MMU030 fake prefetched 4278
> MMU disabled
> MMU030 fake prefetched 21DF
> 68030 MMU enabled. Page size = 32768
>
> Is this message "MMU030 fake prefetched " means something wrong or not
> emulated, or not ?

It only means MMU emulation loaded next opcode before MMU was switched 
on/off. It is workaround for programs that do something like:

Enable or disable MMU that unmaps/remaps memory, including memory where 
next opcode is located.
jmp (an) (or some other single word branch instruction)

Real 68030 (because of pipeline) will have jmp (an) already prefetched. 
Workaround for non-prefetch emulation modes. (Note that it does not 
check if above situation happened, it is always logged)

Most likely problem is something else because crash is practically 
guaranteed if something went wrong.