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List:       freebsd-hackers
Subject:    Re: Is this expected to work? Really? (test of abstraction levels).
From:       "O'Connor, Daniel via freebsd-hackers" <freebsd-hackers () freebsd ! org>
Date:       2020-08-26 7:45:28
Message-ID: 53C7D7AD-86EE-4324-9686-AF4E4D1317F2 () dons ! net ! au
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> On 26 Aug 2020, at 14:49, Zaphod Beeblebrox <zbeeble@gmail.com> wrote:
> So... here's the product:
> 
> https://www.ebay.ca/itm/PCI-Express-PCI-e-to-PCI-Adapter-Card-PCIe-to-Dual-PCI-Expansion-Card-USB-3-0/383647797022?hash=item595330cf1e:g:O~kAAOSw0kxfGdIM
>  
> For those who don't want to click, we have PCIe 1x -->> usb3.0 -->> PCI
> 32bit/66.

FYI that isn't really USB 3, it's just using USB 3 cabling to transport the PCIe.

You can think of it as a PCIe to PCI bridge with some long wires in it.

> Is that likely to work?  Is our abstraction of busses that powerful?  If I
> plug, say, a PCI I/O controller with a floppy on it ... would that be
> detected?

I am not sure it would work but there is a non-zero chance :)

--
Daniel O'Connor
"The nice thing about standards is that there
are so many of them to choose from."
 -- Andrew Tanenbaum


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