Can any of you tell me a manufacturer and part number for the black connector on Ultra ATA cables?
The reason I am wondering, and the reason this actually belongs in "Compact mac" is that I am looking for it for the SE/30 <=> Daystar CPU Socket Adapter project.
I was thinking out loud (or on phosphor) in one of the threads and mentioned something about flat flex cable. This got me to thinking. If it is too difficult, geometrically, to squeeze a Daystar upgrade and a CPU socket adapter under the logic board frame, why not connect the Daystar upgrade to the CPU socket through a flexible cable. True, it will require two circuit boards instead of one, and some cabling system between them, but it could make installation and positioning sooooo much more convenient.
Ideally, the cables would alternate signals with ground wires, although I suspect this isn't really necessary at a mere 16 MHz. Still, it would be nice.
Real flat flex cable seems to top out at 50 conductors in easy to find parts, so it would require four cables (probably too unwieldy) for alternate grounds, or two cables just to carry signals, or three cables for a hybrid of the two, although I don't really have the experience to decide which signals should get the ground separation in the three cable case. Anyway, three 50 conductor flat flex cables would add $20 in materials costs to each adapter in lots of 100.
Another alternative would be to use the Ultra ATA cable which already has alternating ground wires built in. However, I'm unlikely to find premade 4" or 6" cables, plus they need to have the black connector at each end and not the blue or gray connectors. The blue ones tie pin 34 to ground and the gray ones omit pin 28. In each case that would cost one signal. That would be okay, except that each Ultra ATA cables just barely supplies 33 non-ground signals and 99 total are needed. Losing a signal to a blue or gray connector would require adding an entire other cable.
True there are 40 signal pins on an ATA cable, but seven of those are connected to the ground wires inside the connector and so cannot be repurposed without doing surgery on the connectors.
My searching for the part number hasn't yielded any fruit, so I thought I"d check with the eclectic denizens here. I need to find the part numbers, so I can price the things so I can consider their (economic) feasibility.
I need to look to see if there is some way to squeeze it all in there on one board. It sure would be cheaper.
The reason I am wondering, and the reason this actually belongs in "Compact mac" is that I am looking for it for the SE/30 <=> Daystar CPU Socket Adapter project.
I was thinking out loud (or on phosphor) in one of the threads and mentioned something about flat flex cable. This got me to thinking. If it is too difficult, geometrically, to squeeze a Daystar upgrade and a CPU socket adapter under the logic board frame, why not connect the Daystar upgrade to the CPU socket through a flexible cable. True, it will require two circuit boards instead of one, and some cabling system between them, but it could make installation and positioning sooooo much more convenient.
Ideally, the cables would alternate signals with ground wires, although I suspect this isn't really necessary at a mere 16 MHz. Still, it would be nice.
Real flat flex cable seems to top out at 50 conductors in easy to find parts, so it would require four cables (probably too unwieldy) for alternate grounds, or two cables just to carry signals, or three cables for a hybrid of the two, although I don't really have the experience to decide which signals should get the ground separation in the three cable case. Anyway, three 50 conductor flat flex cables would add $20 in materials costs to each adapter in lots of 100.
Another alternative would be to use the Ultra ATA cable which already has alternating ground wires built in. However, I'm unlikely to find premade 4" or 6" cables, plus they need to have the black connector at each end and not the blue or gray connectors. The blue ones tie pin 34 to ground and the gray ones omit pin 28. In each case that would cost one signal. That would be okay, except that each Ultra ATA cables just barely supplies 33 non-ground signals and 99 total are needed. Losing a signal to a blue or gray connector would require adding an entire other cable.
True there are 40 signal pins on an ATA cable, but seven of those are connected to the ground wires inside the connector and so cannot be repurposed without doing surgery on the connectors.
My searching for the part number hasn't yielded any fruit, so I thought I"d check with the eclectic denizens here. I need to find the part numbers, so I can price the things so I can consider their (economic) feasibility.
I need to look to see if there is some way to squeeze it all in there on one board. It sure would be cheaper.
