Oh. I just realised your damn connector must be upside down.

It's like this isn't it?

Ruin a wire direct to ps2 pin 4.
2 should get 5v.
Then the keyboard should work.

I deduced the connector from this:

Pin4 connects to the "wrong" pin for it to not be upside down.
Therefore, Pin4 of the ps2 will be 0v too.
Therefore adding a wire direct to ps2 Pin4 will give a kb 5v.

Then bios, set usb, reboot, pull wire, solved.

Yes, mine is upside down, sorry 😀 I flipped an image over as well to make life easier, but AT Pin 2 (southeast in your pic above) to Pin 4 on PS/2 connector, nothing. Must just be something wrong with this mobo. I don't see anything, but maybe part of that music system setup was to bork something up with the AT connector.

Ah, alright, I'll try the wire trick and get back to you. Might be a few, gotta actually do some work today.

Might be able to jam a floppy power plug onto it.
Just jam it on so only the red pin is on #4

Alright, sorry, wait. Maybe I missed it, when you say connect a wire to Pin 4 on the PS/2 Connector, connect that pin to what? Sorry I'm being oblivious here. I'm way into the unknown for me here 😀

See above.

Get only the red wire on only ps2 header Pin4.
You should be able to do it without too much bending of pins or deshrouding the plug.

Then kb should work.

Hahaha! You sir...are a mad genius. Keyboard recognized with the red floppy plug wire on PS/2 pin 4...

Of course, now my USB keyboards / header doesn't want to work (I probably borked something up in my pin adjustment surgery), but progress is progress!

So questions.

1) Any idea why my board is setup like that crazy setup to need the power on the pin?
2) Any way to fix that so it's not needed?
3) If there isn't a way to fix it, is there any issue with me just leaving that plug on there and using an AT keyboard?

Yay!

1 Probably a dead resistor, maybe cap. 5v simply isn't getting there. The track underneath shows they're connected.

2 Find dead thing, replace

3 It's not ideal... I think it should have some sort of resistor /protection to limit the current long term. I'm not an elect engineer though.

Probably a safer bodge wire would come from usb 5v.
But you've only got 2. So I wouldn't want to kill the supply chip.

If I was to guess
These 4 lines

Connect to these 4 pins

And one line will show 5v on one side of something and 0v on the other

Ah dang. This might cause a problem, especially if I can't get the USB ports working again. I'll need the PS/2 header to connect a mouse to the machine to run Windows. Regardless, without fixing that AT, I've gotta get USB working for at least the keyboard or the mouse. Oh well...thanks again everyone for all the help. Will keep you updated as I keep plugging along.

One final addon, while I still have to figure out the mouse/kb situation, I was able to get floppies, CD and HDD (SSD to IDE converter) up and running. 😀 Running some benchmarks as we speak.

Usb should be easy. You had it working before.

Sure it's enabled?

myne wrote on 2024-10-07, 15:49:

Usb should be easy. You had it working before.

Sure it's enabled?

Yeah, it was working. It's enabled in the BIOS, as is the setting for USB keyboard, but I wonder if I fried something when I was monkeying with the pinout on the header block. I'm pretty sure I have it wired right, and I've got pin wires ordered Red, White, Green, Black in the first four pins on each side (starting in opposite corners because this mobo is crazy). I've tried every permutation of header to pins I can come up with, and the only thing I can think of is maybe before I swapped the pins, I did 5v on one of the wrong pins and shorted something.

Check header for 5v
Should be one on each row.
That's red.
Check 4th pin from 5v on both sides is ground. Black.

Then it's just switch white and green until one orientation works. Data pins aren't a big deal if they're backwards.

I'd expect them to be the same, not mirrored.

Yeah, I'll check the pins for 5v, but this board does have them reversed with Pin 1 in opposite corners.

Edit: Checked 1 to 4 on each respective side and getting about 3.3v

Huh? They're all 3.3v?

myne wrote on 2024-10-08, 01:12:

Huh? They're all 3.3v?

Yeah, seems to be. Which makes no sense, but they're not working right at the moment anyways.

This machine is going to drive me to drink. I just spent about 3 hours trying to get Win98SE installed, just running into constant hangs on the install, Fault outside of MS-DOS Extender errors and all around wonkiness. I swapped out RAM, CPU, did all sorts of stuff and was about to throw in the towel when I thought, "Hey, lemme just try this CF to IDE adapter and 32MB CF card I have instead of these SATA to IDE adapters with 64-120MB SSD's." First reboot with the CF and I was installing Win98... :p

MeatballB wrote on 2024-10-07, 16:48:

Edit: Checked 1 to 4 on each respective side and getting about 3.3v

Yeah that is not right. One of the five has to be ground and one has to be 5v. Two of the other three could be something odd due to no load effect....

I could very well be using my multimeter wrong 😀 Wrong setting on the meter, probing the wrong pins. Still figuring most of this out.

Alright, maybe I'm just using this meter wrong. So, I've got it set to the DCV setting. I'm taking the black probe (which I think is common/ground) and grounding it on a screw on the PSU, then taking the red probe and hitting every pin on the CN7 USB header pins. This time I'm getting weird results (maybe that's the wrong spot for the black probe?). For pins 1-3 on CN7/USB2, I'm getting about 3.3mV? Pin 4 I'm getting about 4.9-5 mV. I doing it right, and does that make any sense? I would have thought Pin1 was the 5v (red wire on the usb plug) and Pin4 was ground (black wire on the usb plug) and the two middle pins (2-3 - green/white wires) are for the USB data.

Looks like the back to back arsy versy connectors some MSIs of that period have. One thought is that 3.3V miiiight happen if the pins are floating due to port being disabled in BIOS or possibly by jumper but that just seems like terrible design.