I've been fixing sound issues across the mid-late 90's Konami stuff and made some discoveries relating to GTI-Club and co.
Firstly, everything here is wrong
The 056800 does not generate any timer interrupts.
For games with an RFC5400, the timer interrupt is generated by dedicated logic. The frequency seems to be fixed but differs between hardware platforms.
We need frequency measurements from GTI-Club, a Hornet-based game and maybe something on NWK-TR too if we're to do this properly.
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