Re: port-mac68k/52237: Trying to install NetBSD/mac68k on Basilisk II crashes it.

[Hauke Fath <hauke%Espresso.Rhein-Neckar.DE@localhost>]

On Wed, 17 May 2017 18:09:48 +0530, Utkarsh Anand wrote:
>> Basilisk II doesn't emulate an 68k MMU, so it cannot run NetBSD.
> 
> Here's an excerpt from the output of BasiliskII --help:
> 
>  --cpu NUMBER
>     CPU type (0 = 68000, 1 = 68010 etc.) [default=0]
> 
> Isn't that the 68k MMU?

No. Basilisk II emulates the Macintosh 68k platform (some virtual 
hardware + ROM, as far as necessary for the Macintosh OS), and not the 
actual Macintosh hardware. See e.g. 
<https://sourceforge.net/p/basilisk/mailman/message/2164622/>.
 
> Also, you can see the specs for Mac II si right here:
> http://www.everymac.com/systems/apple/mac_ii/specs/mac_iisi.html
> It has the 68030 processor.

Supporting the cpu's command set does not (necessarily) mean mmu 
support.

Again: Basilisk does not provide the raw hardware emulation necessary 
to run anything but the Macintosh System. Which is a restriction of 
Basilisk, not one (and much less a bug) of NetBSD.

Cheerio,
hauke

-- 
Hauke Fath                        <hauke%Espresso.Rhein-Neckar.DE@localhost>
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