Re: [B2-devel] [Patch] Init NVRAM to enable PPC memory manager

[Alexei S. <ale...@gm...>]

Committed. Thanks.

-Alexei

On Mon, Aug 24, 2009 at 8:29 PM, Michael Schmitt<msb2ssdev@me> wrote:
> Attached is a patch to SheepShaver, to fix a SIGSEGV crash that occurs when
> booting a new machine with OS 7.5.
>
> One of the bytes in the xPRAM portion of the NVRAM controls which version of
> the system memory manager is used by OS 7.5: the legacy 680x0 memory manager
> or the PPC memory manager (aka the "Modern Memory Manager"). OS 7.5 is
> supposed to be able to use either one, but for some reason SheepShaver
> crashes on boot if the 680x0 version is used.
>
> Later Mac OS versions don't have this problem. They don't support the 680x0
> version, so they force the PPC version to be used.
>
> The fix is to have SheepShaver initialize the NVRAM to use the PPC memory
> manager. Note: This is supposed to be the default in OS 7.5.
>
> This affects when a new NVRAM file is used, or when it is initialized after
> doing zapping the PRAM.
>
>
>
>
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