It Came from the Desert (DOS) Roland Driver for other IRQs rather than IRQ 2/9
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Extract and rename ROL_IRQ#.SND and overwrite the ROL.SND in the game directory.
I tested IRQ number 5 and 7 and confirmed they work.
But, it seems that IRQ number 6 cannot be used (seems like the game requires FDD controller at IRQ 6).

Enjoy!

https://kykypyza.tistory.com/11?category=942715