MrSmiley381 wrote on 2020-01-09, 03:23:
shamino wrote on 2020-01-08, 03:14:
Last weekend I replaced a DIN keyboard connector on a Tyan S1590 baby-AT socket-7 board. I noticed it would be possible to install a pair of PS/2 connectors for mouse+kb, but doing so would require switching to an ATX case. That's a problem for this board because the layout puts the AGP slot too high to use with ATX cases. Therefore I stuck with the AT style DIN connector, even though I don't own a single DIN keyboard.
I've got this same motherboard and it looks like I need to do some DIN repair as well. Do both the AT keyboard and mouse connector share the same footprint with a standard MiniDIN 6 header so that you can solder directly to the board? If so, I might go that route as well since the case I'm using has a small IO panel that can be removed to accommodate more than just an AT keyboard connector. I'd check myself but there's a lot of cable in the way at the moment.
I believe so, yes. The footprint matches a 6-pin mini-DIN that I had on hand, but since I decided not to use it, I never confirmed for certain that the pinout is correct. I expect it is, but you'd want to make sure of that. I only got far enough to say that the solder points are common to the 5-pin DIN, but I didn't confirm they're all in the correct locations.
I've attached a picture I took under the board when starting to work on it. <Not sure what happened to the option of pasting it in the middle of my comment>
The solder points for the 6-pin mini-DINs are at different distances from the back of the PCB. So that aspect of it is odd. I think a mini-DIN keyboard port would stick out from the board a bit. If I remember correctly, I think the mouse port was the one that looked like it would align with the edge.
As viewed in the "normal" orientation, the solder location for the mouse port is below the keyboard - in the space between the keyboard and the AGP slot. It's the same location where the vertical header pins are from factory. I think it would be blocked by any AT case, since there's going to be some metal between the top expansion bay and the keyboard opening.
I presume that an ATX case might allow access to a mouse port, because they have 1 less expansion bay. But as mentioned, using an ATX case also means losing access to the AGP slot.
Another option would be to install vertical pins at the keyboard location, just like Tyan did for the mouse, and then use 2 mouse brackets - 1 for the mouse and 1 for the keyboard. Or come up with a custom way to mount those connectors instead of using 2 brackets.