Other questions:

How feasible is it to connect the MT-32 in some other way? I don't know if I can use a gameport-midi cable in tandem with a Gravis Phoenix, or if I can put the MPU-IPC-T card in the same machine as the SCC-1, as I know that even if changing the ports to avoid conflicts, many games are hardcoded for port 330.

The SCC-1 is playing GM music, it just appears that the midi out is faulty on this card, unless I am missing something...

What are the jumpers set to on the SCC-1 ?

Did you verify that the MIDI cable is good?

SCC-1 manual:
http://chiclassiccomp.org/docs/content/comput … and%20SCC-1.pdf

cyclone3d wrote on 2020-04-04, 23:38:

What are the jumpers set to on the SCC-1 ? […]
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What are the jumpers set to on the SCC-1 ?

Did you verify that the MIDI cable is good?

SCC-1 manual:
http://chiclassiccomp.org/docs/content/comput … and%20SCC-1.pdf

Thank you, I will read the manual.

The only jumper that I see is for IRQ, which is set to 2. I looked for other jumpers, though all I can see are two tiny switches labeled A1 and A2. The cable worked to connect the MT-32 to a Live! Drive a couple of years back.

According to the manual, I have the SCC-1 set to IRQ 2, Port 330. It just isn't communicating with the MT-32. Perhaps there is something wrong with the card, though it plays music if games are set to General Midi, utilizing the SCC-1's sounds. It just doesn't pass anything to the MT-32...

what os are you running? win98?

Hamby wrote on 2020-04-05, 16:44:

what os are you running? win98?

I'm sorry, I missed your post.

I am running MS-DOS 7, WFW 3.11, and Windows 98SE in the current retro-rig.

are you using the the original SCC-1 cable for the midi port?

keropi wrote on 2020-05-05, 16:05:

are you using the the original SCC-1 cable for the midi port?

When I b ought the SCC-1 from ebay, it came with a midi cable, maybe it was 8 inches or so. I tried that one and I tried two cables that came with a Sound Blaster Platinum I/O drive. Is the wiring for the SCC-1 midi cable different from other midi/mini-din cables?

yeah this is the case most likely
I will make an easy schematic so you can crosscheck your cables , give me some mins - you will need a multimeter in continuity mode

here it is, please verify that you have these connections - if any of the 3 is not good or the pinout is different then it would explain why the mt-32 is not working

keropi wrote on 2020-05-05, 16:20:

here it is, please verify that you have these connections - if any of the 3 is not good or the pinout is different then it would […]
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here it is, please verify that you have these connections - if any of the 3 is not good or the pinout is different then it would explain why the mt-32 is not working

Thank you for the schematic. My multimeter pins are too large, so I need to grab a paperclip to insert into the midi-holes. I can't find the cable that came with the SCC-1 at the moment, but if it is a matter of a differently wired cable, I would be happy to buy another mini-din and cut/splice it. Being able to connect my MT-32 to the SCC-1 would solved a lot of problems and allow me to sell my MPU-IPC-T card/box! Most people over the years have told me that any of these cables should work. It makes me wonder, if the wiring is different on the SCC-1, if those people even had an SCC-1 or if they assumed that they were wired the same.

So Roland used proprietary cables rather than the straight midi-to-mini din?

EDIT: My multimeter isn't working, but I found this link, and that individual is successfully using the creative midi cables I have on hand with an SCC-1. I think my midi ports are dead on my SCC-1. It is strange, since the card works otherwise...

Roland SCC-1 MIDI in/out cables

well maybe you have a bad cable, only a multimeter will tell for sure
In each SCC-1 there were 2x cables so it was no issue if their pinout was custom

keropi wrote on 2020-05-05, 18:24:

well maybe you have a bad cable, only a multimeter will tell for sure
In each SCC-1 there were 2x cables so it was no issue if their pinout was custom

When I figure out what is wrong with/replace mu multimeter, I'll test things out. completely forgot about my multimeter and using one to test these things. I used it when I posted on Vogons about a proprietary mouse connector on my Zida 4DPS Tomato board.

I wish that there was a way to repair the card, but I don't know how to solder and work with such small parts.

I still think that I may ultimately sell this SCC-1 and use a Dreamblaster X2 and the AWE64 Legacy with it's hard mpu, when it comes out. It is difficult to say, since the SCC-1 is so iconic and rare. I may keep it to slap into another retro box.

The quest for the ultimate 1980-2000 rig continues...