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Date: Tue, 6 Jan 2015 16:33:15 -0500
Message-ID: <CAKyx-3P-n4S-SeupjcKCi2bvCpt3csGsU=LJ=_JRqwz19x0WjA@mail.gmail.com>
From: G 3 <programmingkidx@gmail.com>
Content-Type: text/plain; charset=UTF-8
Subject: Re: [Qemu-devel] Gives user ability to select endian format for
 video display - fixes Mac OS X guest color issue.
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To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Maydell <peter.maydell@linaro.org>, qemu-devel qemu-devel <qemu-devel@nongnu.org>

I start the guest like this:
qemu-system-ppc -hdd ~/machd.img -boot c -prom-env boot-args=-v

Hope this is what you wanted:

00:00.0 Host bridge: Motorola MPC106 [Grackle] (prog-if 01)
        Subsystem: Qumranet, Inc. Device 1100
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-

00:01.0 VGA compatible controller: Technical Corp. Device 1111 (rev
02) (prog-if 00 [VGA controller])
        Subsystem: Qumranet, Inc. Device 1100
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Region 0: Memory at 80000000 (32-bit, prefetchable) [size=16M]
        Region 2: Memory at 81000000 (32-bit, non-prefetchable) [size=4K]
        Expansion ROM at 81010000 [disabled] [size=64K]

00:02.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS)
        Subsystem: Qumranet, Inc. Device 1100
        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Interrupt: pin A routed to IRQ 23
        Region 0: I/O ports at 0400 [size=256]
        Expansion ROM at 81040000 [disabled] [size=256K]
        Kernel driver in use: ne2k-pci
        Kernel modules: ne2k-pci

00:03.0 Class ff00: Apple Computer Inc. Heathrow Mac I/O
        Subsystem: Qumranet, Inc. Device 1100
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop-
ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap- 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort-
<TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0
        Interrupt: pin A routed to IRQ 24
        Region 0: Memory at 81080000 (32-bit, non-prefetchable) [size=512K]
        Kernel driver in use: macio


On 1/6/15, Paolo Bonzini <pbonzini@redhat.com> wrote:
>
>
> On 06/01/2015 19:07, Programmingkid wrote:
>> http://www.mcamafia.de/pdf/ibm_vgaxga_trm2.pdf This file is the
>> specifications to the VGA standard. It makes no mention of pixel
>> endian format. There is no mention of bit order in the
>> specifications. It's probably assumed to be little endian.
>
> The VGA didn't even have modes with more than 256 colors, so there's no
> endianness at all.
>
> How are you starting the guest?  Can you paste the output of "lspci -vv"
> in a Linux guest that (apart from the disk contents) has the same
> hardware as your Mac OS X guest?
>
> Paolo
>