David Wolf (DOS) Modded Executables Using other IRQs rather than IRQ 2 for Roland Midi
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Extract and rename agent_IRQ#.exe and overwrite agent.exe in the game directory.
I do not know the correct reason, for this game, it seems that IRQ number 5 cannot be used for midi playback.
I tested IRQ 6 and 7 and confirmed they work.
Enjoy!

https://kykypyza.tistory.com/10?category=942715