Here's my MPU-IPC-T...

both of these gear are great pieces of hardware.

You really should just build a retro rig. Get an MT-32 to hook up to the IPC-T as well.

Both of those cards you have fetch way more money than I am willing to spend on single cards.

If you really want the external SC55, then sell those and get what you want.

For the prices those cards sell for you could build a whole retro rig, get your SC-55, and probably still have a decent amount left over.

In the mean time I also got me a nice Roland D-50 synthesizer at a very good price and in a very good condition. It's actually a bit silly I got this because I don't even play keyboard. But I wanted it because sound-wise it's closely related to the MT32. And having a synth is a kids dream to me. And of course, one is never to old to learn! 😉

heh, I know that feeling, I kind of really want a keyboard again to play around with midi stuff, even though I probably haven't played in 20 years... and no I couldn't really play back then either, it was a Yamaha PSR 200, recently gave it away to my nephews, now I'd rather have a smaller one though.

Yeah the size of that thing is my biggest issue right now 😁

IF you ever want to try feeding the SCC-1 separately:
I did once (7 years ago) feed my card using a PSU+old 486 DX-100 motherborad (not even with a CPU attached 😊 ).
It ran fine (used it connected to a Kawai K1).

I then checked how I could feed the SCC-1 directly and found some info on different forums, among which one guy who actually did it.
Here is what I remember:
* Only 2 connections are used to feed the card: GND and +5V.
* There is one connection on the board acting like a reset switch. It should be sent a reset signal on startup for the board to operate ok.

And as I saw your topic here I checked for the MPU-401 "Technical reference manual" which was originally sold separately but can be found on ManualslibDotCom.
In there you can find a circuit diagram that should match the SCC-1.

And here: https://old.pinouts.ru/Slots/ISA_pinout.shtml is the pinout for the ISA standard (SCC-1 uses only A & B pins since it is an 8-bit card).
+5v, GND and reset are all on B-side connectors (soldering side of the board).

I guess the main challenge will be to find a stable enough +5v power source.

I will give this a try one day but this project is far on my list...
I hope this still helps.

PSU should be simple. Just get a standard JAMMA arcade PSU. Simple screw terminals, adjustable 5v so you dont overdo it. And enough juice to run basically anything. Most will also have a -5v if you need it for future projects.

I am so curious - did you ever trade out your SCC-1?

Yep... Traded it for a SC55 MK2