Remake duos PCI Riser for intel d510mo

Question

Do it yourself

Iron problem.
There is an intel d510mo motherboard and such a raiser for it.
As described on the Internet, only one port works in the raiser.
This is due to the fact that the motherboard for the second slot uses additional Req#/Gnt# signals. The raiser has its own PCI bus arbiter at209sg. And additional signals are not divorced. Because of this, the second slot does not work.
From the motherboard manual:

The PCI Conventional bus connector also supports single-slot and dual-slot riser cards
for use of up to two bus master PCI expansion cards. In order to support two PCI bus
master expansion cards, the riser card must support the following PCI signal routing:
• Pin A11: additional 33 MHz PCI clock
• Pin B10: additional PCI Request signal (ie, PREQ#2)
• Pin B14: additional PCI Grant signal (ie, GNT#2)

Tried to cut the referee.
Spread Req#2 and Gnt#2 to the second slot, Req# and Gnt# to the first one.
IDSEL of the first one on the AD27, the second slot on the AD29
CLK left unchanged, from the motherboard to the arbiter, there, through the buffers, each slot has its own double.
IntA-C are divorced as expected, with a shift on the second slot.
As a result, the boards are seen by the system, but interrupts do not come.
In one of the rework options, interrupts come, but all packets go to errors.
Most importantly, the questions:
Has anyone done this?
inpc are said to make modified raisers for Intel motherboards.
A couple of wires.
Does anyone have access to one to peep modifications?
Where did I go wrong?
Should I cut the CLK and wire it to the second port with pin A11?

Answer 1

Everything turned out to be easier, thanks to the guys from inpc.com.ua, they helped with a hint.
In order for the second PCI connector to work on this raiser, you need to cut off INT D # (pin B8 of the motherboard), which goes to INT A # (pin A6), and connect it (INT A # (pin A6)) to INT C # (pin A7).
Throw IDSEL (pin A26) of this connector (which is switched by jumpers to the address line) on AD20 (pin A29). You can use a 1K ohm resistor.
Once again, I note that all these alterations relate to the legs of the second connector, farthest from the motherboard.

Answer 2

I think you are here electronix.ru/forum/index.php , it is unlikely that anyone will help here.