Adrian (a.delete@this.acm.org) on June 3, 2022 5:26 am wrote:
> Michael S (already5chosen.delete@this.yahoo.com) on June 3, 2022 4:39 am wrote:
>
> >
> > The later is actually quite troublesome for our company - we have troubles finding replacement
> > for Compact PCI host SBC that supports both 64-bit PCI data bus and 32-bit Windows.
> >
>
>
> I believe that you should have better luck searching for a board containing a PCIe to PCI-X bridge chip,
> like those made by Broadcom or Diode Incorporated,instead of searching for a SBC with 64-bit PCI.
>
> Such a bridge board could be used with any modern SBC with PCIe.
>

I don't understand how it looks mechanically.
Compact PCI board with full backside bus that serves as COM Express carrier?
Do OTS products like that exist?

>
> If you do not need many, you could make yourselves such bridge boards.

The purpose is to do as little development as possible.
If we do not find suitable product on the shelves, it would be simpler to go through trouble
of signing 64-bit drivers via Microsoft's bureaucratic procedure than to do HW development.
After all, we have all 64-bit drivers compiled and working, they just can't be used due to lack of signing that is optional in Win32, but mandatory in Win64.
Up until relatively recently, it was possible to sign drivers by 3rd party certificate, so it was just a matter of little money, but we missed the opportunity to do it when it still worked. But since 2021Q3 the only option for signing is Microsoft themselves.

> However, looking out of curiosity
> at Mouser, I see that the PCI bridge ICs are in stock only for 32-bit PCI, while the models for 64-bit
> PCI have many thousands on order and leading times between 3/4 years and 6/4 years for new orders. Maybe
> at other distributors the availability is better, but at the first glance it was not encouraging.
>
>
>