[OpenBIOS] [PATCH] drivers/escc.c: Add slot-names property ch-a node under escc

BALATON Zoltan balaton at eik.bme.hu
Tue Feb 9 17:06:24 CET 2016


On Tue, 9 Feb 2016, Alyssa Milburn wrote:
> On Tue, Feb 09, 2016 at 09:47:57AM -0500, Programmingkid wrote:
>>> You can assign addresses for serial DMA and even OS 9 will try poking at the
>>> dbdma controller, so this is just a question of hooking up the qemu side. I
>>> can try doing this later today if it's useful..
>>
>> It is definitely useful. The ability to run Mac OS 9 in QEMU depends on it.
>
> After a few days spent poking through the startup process in MacsBug, I'm
> not sure this is true. But I'll hook it up later (if someone else doesn't do

Without knowing anything about the details I had the same feeling, 
considering that on real hardware there was a modem connected to that port 
so it may be looking for that modem. But I think we want to emulate a 
functional serial port but without the modem instead so we don't need to 
emulate the modem as well. Not sure what should it say for just a serial 
port. Maybe none or serial instead of modem.

I've mentioned this before here:

http://lists.nongnu.org/archive/html/qemu-ppc/2016-01/msg00467.html

> In any case, it makes sense as a value. (Does anyone have an OF dump from a
> PowerMac3,1?)

I've sent this in the message above:

http://web.archive.org/web/20090107145016/http://penguinppc.org/historical/dev-trees-html/g4_agp_400_1.html#.

I've also found these (from NetBSD and Linux appearently):

http://nandra.segv.jp/NetBSD/G4.dump-device-tree.txt
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=604134

Hope this helps.

Regards,
BALATON Zoltan



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