OK, so FB8 was open. The solder did look a bit questionable, but reflowing it did not help. I removed it and soldered in a jumper and it's fixed! Ah, that's good to hear, so glad we got to the bottom of this! Now, obviously this leaves me wondering why I didn't notice this issue when testing your …

So... reading your comments and thinking about this, I suspect the ferrite bead FB8 is either broken or not making good contact with its pads. First of all - the ferrite bead itself should only drop the voltage a miniscule amount, like 0.01V in my measurement. The fact that you're both not seeing …

So... reading your comments and thinking about this, I suspect the ferrite bead FB8 is either broken or not making good contact with its pads. First of all - the ferrite bead itself should only drop the voltage a miniscule amount, like 0.01V in my measurement. The fact that you're both not seeing …

I was tracing out the AGP slot and taking some measurements with the intent of adding some bulk capacitance to the 3.3V rail. I noticed that, for example, pin 9 only gets 3.3V when there is a card in the slot and also that it measures more like 3.1V. I am wondering if this supply is derived or if …

The CPU draws very little power, only like 3-4 W or something if I remember correctly. Yeah, I could see from my bench supply that the entire board (including the i740) draws less than an amp on average when using the picoATX. So something like 10W. For good measure, maybe you could try running …

I find it weird that power should be an issue - especially if you checked the power rails at the AGP connector with a scope. If there was insufficient bulk capacitance, I think you'd see drops in voltage. I tested the boards with a Radeon 9520 and a Voodoo3 3500 and never saw any of these issues, …

I have been messing around with my board for a week or so now. I've run into a number of issues. Power delivery seems to be a factor, but I don't quite understand why. I started with a 200W mini ATX PSU I had lying around. I could not get any graphics card to work reliably with it. I swapped over to …

True, but there was no SoftMPU 15 years ago. In fact, I didn't even know about SoftMPU until after I found HardMPU. 😀

I just wanted to give a quick thank you for this project. I bought an MT-32 over 15 years ago without understanding that it wouldn't work with the MPU-401 interface on the SoundBlaster. Real MPU-401 cards have gone for crazy money on eBay even back then, so the module just sat in a box while I tried …

Oh, and one more thing: those $15-$20 USB floppy drives on eBay/Amazon all seem to be *used* drives in new shells. I had to buy a few of them to try to get a good one. It doesn't matter which "brand" you pick. They all seem to be the same. They don't always have a USB-to-26pin adapter, either. Some …

I just wanted to reply to this thread to give my experience. I have tried to do the very thing that the OP was intending: to find a way to hook up an existing floppy drive to the motherboard via some sort of USB bridge. I tried several ways: 1) A USB-to-26pin adapter PCB taken from a cheap USB …