Voyetra OP-400x missing breakout box \ VOGONS

Voyetra OP-400x missing breakout box

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First post, by bjorn_and

Posted on 2012-11-23, 15:19

bjorn_and Offline

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Location: Sweden

Hi!

I recently acquired an IBM XT-286. In that machine I found a Voyetra OP-400x card which I think is a 100% MPU-401 compatible, but I'm not sure.

Also, it's missing the breakout box.

So if anyone here can help me:

1. Is there anyone who knows if this card is MPU-401 compatible (I would think so)

2. Is it possible to build your own breakout box? I was thinking if I could use an MPU-401 breakout box which are readily available on eBay, but at least for early Roland MPU-401's, the breakout box is the actual MPU-401?

See attached images.

Thanks!
Björn Andersson

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voyetra_back_op-400x.jpg

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92 downloads

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Reply 1 of 4, by Great Hierophant

Posted on 2012-11-23, 17:13

Great Hierophant Offline

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As you have learned, the card is a true Roland MPU-401 compatible. All you need for Sierra games are three signals, +5v, GND and MIDI OUT. The first two signals should be fairly obvious. The last comes from the 7407 hex inverter. Use the schematics published in the Roland MPU-401 and MPU-IPC-T manuals as a guide.

http://nerdlypleasures.blogspot.com/ - Nerdly Pleasures - My Retro Gaming, Computing & Tech Blog

Reply 2 of 4, by bjorn_and

Posted on 2012-11-23, 19:28

bjorn_and Offline

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Rank: Newbie
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Joined: 2012-11-23, 15:04
Location: Sweden

Thanks!

I don't know much about this, so sorry if I'm asking stupid questions 😀

But, I can get a very cheap mpu-401 breakout box. Would that work? I don't want to try and then break something...

If not, do you know where I can get schematics? (Apart from manuals which I don't own)

Björn

Reply 3 of 4, by Great Hierophant

Posted on 2012-11-24, 07:10

Great Hierophant Offline

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I would not try some breakout box unless you traced pins on the card and the box first.

http://www.rolandus.com/support/owners_manuals/

http://nerdlypleasures.blogspot.com/ - Nerdly Pleasures - My Retro Gaming, Computing & Tech Blog

Reply 4 of 4, by bjorn_and

Posted on 2012-11-24, 07:49

bjorn_and Offline

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Rank: Newbie
Posts: 3
Joined: 2012-11-23, 15:04
Location: Sweden

Wow, amazing they keep those old manuals available!

Thanks!

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