Changes
/* Magic Sound Board for Aleste 520EX */
F9DAh Magic Sound Board - 1st 8254 - Timer 2 (DMA Channel 2) (W)
F9DBh Magic Sound Board - 1st 8254 - Timer 0-2 Control (W)
Clock source for all six timers is (inverted) 4MHz from expansion port.
== Timer Registers ==
