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11

They are just timers that can be used for any purpose anyone can think of for keeping track of time in a system. Just like any other timer. The timers can be set to elapse after a certain period of counts, and the status of both timers being elapsed or not can be read from the OPL chip status register. In addition to just reading the status, the timers can ...


5

The Yamaha Applications Manual (not the Data Sheet) describes how to use the timers and IRQ output. See https://usermanual.wiki/Document/Yamaha20YM381220Application20Manual.26216546/html Sections 3.1.2 and 3.5. Even if the chip signal pins were not connected, one use for the timers was to check if the computer had the chip installed. This Programming Guide ...


2

Here is an example of what the modern preprocessing Tommy is alluding to actually sounds like: er1.ssd er2.ssd er3.ssd. This is encoded using pcmenc, storing 4-bit volumes for each of the three tone channels in turn, evenly spaced at 35294Hz, so this is 12-bit sampling at 11.7kHz or 4-bit sampling at 35.3kHz depending on how you want to look at it. At an ...


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