eesz34 wrote on 2022-07-26, 20:58:
eesz34 wrote on 2022-07-26, 15:44:
I got this NOS AT case and motherboard, and the keyboard connector is not centered in the case hole. It's strange, I've never expected this would even be a thing.
From the case's perspective, the keyboard connector is too close to the expansion slots. The keyboard plug does fit into it without interference, barely. I don't have another AT case or MB so I can't compare. But because it's a big name MB, I'd wager my bets on the case being off.
Is there a mechanical drawing somewhere of AT form factor dimensions?
Could someone maybe get out one of their AT motherboards and measure the distance from, say, the mounting hole at the corner where the keyboard connector is, to the center of the keyboard connector? I want to compare and determine if it's the case or MB that's off.
Inches or cm are welcome 🤣.
It's harder than it might seem to do this measurement with any precision using a sliding caliper, so take this with a grain of salt. Got 31.8 mm from edge to the center of the connector.
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Measuring mobo edge - connector edge (42.5 mm), and subtracting half the connector's measured width (20.8 / 2 = 10.4) gives 32.1 mm. This is a better measurement method, but it's assuming that the connector is symmetrical over its center.
Edit: distance from edge to mounting hole center is 8.0 mm, subtract that from the earlier measurements if you rather want mounting hole - connector c/c.