SSI : Prophecy of the Shadow & MT32 \ VOGONS

SSI : Prophecy of the Shadow & MT32

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First post, by Shagittarius

Posted on 2010-07-17, 15:50

Shagittarius Offline

Rank Oldbie

Rank: Oldbie
Posts: 1558
Joined: 2007-12-20, 06:49
Location: California, USA

So I've been messing around with Prophecy of the Shadow and I can't get it to run with MT32 for music. I've tried uart and intelligent mode but the same thing happens for each; the screen goes blank after starting the game and freezes. I watch my MT32 but no communication is taking place with the game in either mode.

I'm using a real brand new (was sealed till I opened it) copy of the game. Does anyone know anything about this title and the MT32?

Reply 1 of 5, by ripsaw8080

Posted on 2010-07-17, 18:27

ripsaw8080 Offline

Rank DOSBox Author

Rank: DOSBox Author
Posts: 5041
Joined: 2006-04-25, 23:24

In the QUEST.TXT file included with the game there is this note: "Added support for SB/SBpro at non regular address." There is in fact a mechanism in the game's code to switch between base ports of 220 and 240 for the SB, but it was also made to apply to the MT-32 music configuration, which looks like a bug. The MIDI base port should be 300, 310, 320, or 330 (DOSBox has it at 330), and the game hangs trying to interact with the MPU-401 on ports 220 and 221.

A brief search turned up no patches for the game; but there is a way to get the MT-32 music working if you don't mind a little hex editing: at offset 43C in MT32MPU.ADV change bytes 8B 46 06 to B8 30 03.

Reply 2 of 5, by Shagittarius

Posted on 2010-07-20, 04:55

Shagittarius Offline

Rank Oldbie

Rank: Oldbie
Posts: 1558
Joined: 2007-12-20, 06:49
Location: California, USA

That's totally killer thanks so much for your help! Works perfectly, now I can enjoy it in hi-fi man! Thanks!

Reply 3 of 5, by Dagar

Posted on 2014-03-29, 23:39

Dagar Offline

Rank Newbie

Rank: Newbie
Posts: 76
Joined: 2008-01-20, 17:01

Installed this game today and wanted to give ripsaw8080 a thanks for giving the solution to get the MT-32 music working. Works a treat and sounds much better than the Soundblaster music.

Reply 4 of 5, by MagikGimp

Posted on 2017-08-28, 00:02

MagikGimp Offline

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Rank: Newbie
Posts: 9
Joined: 2017-08-27, 23:59

Oh ripsaw, you are a star! 😊 What a silly thing for them to overlook. I also can't believe I've never had a Vogons account until now. Been visiting this site for centuries... 😒