Did you read my reply to your other thread where I answered this exact question?

Yes. Dnewhouse, you're absolutely welcome here and we're happy to help you out, but it's also important to make use of the resources available on or through this forum to inform yourself. Many of your questions have already been addressed in previous threads.

I realize that it's easy to be overwhelmed by enthusiasm and ask a million questions (sometimes I do the same), but doing research ahead of time will allow for better questions, get you better answers, and ultimately result in a better learning experience. Taking a little time to plumb this site through Google will at a minimum provide context and background that will allow you to drill for your answers quicker.

I agree - dnewhouse, you're more than welcome to ask questions.
However, I get the impression you want to do something or build something up (like maybe build a retro DOS PC that has MT-32/CM-32L support), but you're looking for answers or more information on the subject?

If that is the case, instead of opening up various threads about the same subject, I suggest you start a thread informing us what you want to achieve or what information you're specifically looking for, and based on that we can pitch in and provide you with answers - in many cases, we can then point you to an old thread, but as xjas has stated, most of the information can be found by just searching on Vogons or Google.

If you want to know more about the MT-32 and the MPU-401, then have a look at this page (as an example, there are many more): http://nerdlypleasures.blogspot.co.za/2010/03 … land-mt-32.html