Hi there,
I'm just wondering if this is possible at all. I know there's an adapter for the 7100/8100 but there's no mention whether it works or not in the 9150.
There should be no reason the adapter kits for Sonnet or NewerTech would not work in the 9150. However both tie up a NuBus Slot, which might not be so in the larger case of the 9150. Even if it's necessary to use such an adaptation that's not nearly the problem with the 7100/8100.
There seems to be some logic on the ribbon cable, so making a replica would be damn near impossible.
Any ideas?
Have you already got the G3 card? If you have the Crescendo is it the low profile compatible with the 6100 or the taller version? Check that it has the PDS passthru slot for that cable. IIRC some didn't. If you haven't sourced it as yet, make sure of what you're getting in terms of passthru and the lower 6100 compatible version may be far more flexible for your needs.
On the ideas front, PCI extender cables, risers or some such could be workable. The wider section is a perfect fit as is for the wider section and a second can be cut down to fit the narrow section.
What's the physical arrangement in terms of what plugs in where next to the PDS Slot? Very interesting machine, the only PPC Mac with
four NuBus slots? Love the relocated FDD. The headroom above the NuBus slots is reminiscent of my Radius 81/110's big metal can. That could turn out to be very handy in solving your problem.
I recognize the 8 SIMM slots on the left above, but what are those two (DIMM?) slots above the HPV PDS? What the heck is that connector in between a row of Power jacks for add'l HDDs?
IIRC my Low Profile Crescendo (AWOL ATM) PDS Passthru Slot is located above the heatsink on the accelerator, pointing straight up over that mess. Can you take some pictures detailing that section as above? Thinking here is that a backset angle adapter might just hold the card vertically within that Radius-like cubic overhead the NuBus and PDS slots? What's the available space between the Crescendo's slot and HDDs that might interfere?
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The setback would need to be much steeper than I can illustrate in ASCII to clear the now internal DA-15 connection. The setback of the PCB traces would need to be a bit more than the NewerTech cable above for scootch room. The "vertical" offset of the adapter's slot would need to be short enough to clear any obstruction from too tall components in the area in question. The Power Supply position blocks such an installation in my Radius 81/110, but there is plenty of vertical clearance for such a configuration.
You can check your machine by installing the Crescendo and setting the HPV card on its RA passthru slot. If it then fits within available overhead you're good to go with a very simple up-angle extender, assuming there's no board mounted schiznit in the way.
@Bolle the cable of course needs to be 1:1 and I'm very interested in what you find out about the which signals are running in and out of that PCB's logic? The cable
may not necessarily need the logic. I have several NewerTech G3 cards as above with the short, 50+mm hardwired cable. It's a weak point in the design that's somewhat prone to mechanical failure, not electrically as it seems to me. The question about using PCI extenders would be electrical in nature.