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Tue, 4 Nov 2025 23:12:57 -0500 (EST) Date: Wed, 5 Nov 2025 15:13:09 +1100 (AEDT) From: Finn Thain To: "Dr. David Alan Gilbert" cc: Stan Johnson , mpe@ellerman.id.au, npiggin@gmail.com, christophe.leroy@csgroup.eu, sam@ravnborg.org, benh@kernel.crashing.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, rdunlap@infradead.org, Cedar Maxwell Subject: QEMU limitations, was Re: [PATCH v4] powerpc: Use shared font data In-Reply-To: <797f0a13-350f-e26d-f1ef-876419e1c013@linux-m68k.org> Message-ID: <492c13c9-666c-9578-6c66-0eb8fefc93dc@linux-m68k.org> References: <20230825142754.1487900-1-linux@treblig.org> <20108eef-b7cf-3f23-264a-5d97021f9ffa@linux-m68k.org> <797f0a13-350f-e26d-f1ef-876419e1c013@linux-m68k.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii On Mon, 3 Nov 2025, Finn Thain wrote: > > OK, remember I don't think I've ever tried PPC via MacOS booting, so > > not familiar with it. > > > > I will try to set up a MacOS guest in QEMU, to see if the hang can be > reproduced that way. > QEMU appears to be incompatible with the Old World ROM from the Beige G3. 'qemu-system-ppc -M g3beige -bios 78F57389.ROM -serial stdio' drops into a ROM diagnostic menu and won't boot. I did get 'qemu-system-ppc -M mac99 ...' to boot into MacOS 9, by using OpenBIOS instead of Apple firmware. Unforunately, BootX is not compatible with this configuration, so it won't help. BootX is compatible with beige powermacs, but 'qemu-system-ppc -M g3beige' with OpenBIOS fails to boot MacOS 9 ("MacOS: unable to find an interrupt controller node"). OpenBIOS wouldn't boot a MacOS 8.1 CD-ROM either, but for different reasons: both mac99 and g3beige failed with "No valid state has been set by load or init-program".