On Sep 18, 2015, at 2:33 PM, Alexander Graf wrote: > > >> Am 18.09.2015 um 15:55 schrieb Programmingkid <programmingk...@gmail.com>: >> >> >>> On Sep 18, 2015, at 2:14 AM, Alexander Graf wrote: >>> >>> >>> >>>> Am 17.09.2015 um 14:42 schrieb Programmingkid <programmingk...@gmail.com>: >>>> >>>> Is there a way to make USB work with Mac OS X on qemu-system-ppc? I used >>>> the -usb option, but mounting a flash drive didn't work. Would you know >>>> anything that could help? >>> >>> Nothing of the top of my head. It did work on x86, so maybe the ohci >>> emulation is broken? OS9 doesn't boot because of USB breakage in ohci... >> >> Just looked at Cormac's GSOC page. He said Mac OS 9 is attempting to write >> to the OHCI's HcDoneHead register. Is there anything stopping us from >> changing the HcDoneHead register so that it can be written to? > > Iirc the problem is deeper...
I think you may be right. Do you have any more information on this problem? > >> >> My other idea is that the operating system thinks the root hub is made by >> Apple. If we changed the device descriptor so that the software thinks it is >> made by someone else, then the operating system might use the register >> correctly. I'm thinking that Apple made their own root hub that can do >> things a standard OHCI USB controller can't do. What are your thoughts? > > I doubt that this is the reason. I did make a patch that makes the hcDoneHead register writable. I can't say I noticed a difference in Mac OS 9 or Mac OS X in QEMU with it.
