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Author Topic: USB 2.0 for 9  (Read 1436 times)

dtellis84

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USB 2.0 for 9
« on: May 03, 2026, 10:40:23 AM »
I know it’s been discussed many times but is anyone actively working on a USB 2.0 in os9 patch?
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joevt

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Re: USB 2.0 for 9
« Reply #1 on: May 03, 2026, 05:50:25 PM »
Probably not.

Documentation of how to create a UIM (USB Interface Module) has not been uploaded anywhere so we cannot make a EHCI UIM for USB 2.0 or an XHCI UIM for USB 3.x.

I suppose one could try reverse engineering the OHCI UIM for USB 1.1 then create a UIM for EHCI or XHCI.

You can find some documentation of the USB Interface Module (UIM) in USBPriv.h but that doesn't have everything required.

Mac OS USB DDK API Reference:
https://developer.apple.com/library/archive/documentation/Hardware/DeviceManagers/usb/usb_ref/usb_api_ref_v26.pdf
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IIO

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Re: USB 2.0 for 9
« Reply #2 on: July 21, 2026, 08:05:16 AM »
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Protools5LEGuy

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Re: USB 2.0 for 9
« Reply #3 on: July 27, 2026, 04:51:04 AM »
Thank you for all this.

A dream become true.

Even if it only works for a limited hardware combo and less than theorical speed IT IS A GREAT ACHIEVEMENT !
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