Changes
/* Aleste 520EX Serial Interface and Color Palette Swap */
F4X2h Aleste PPI Port A, 8253 ColorSet Timer 2 (FUTURE) (W)
F4X3h Aleste PPI Port A, 8253 Timer 0-2 Control Registers (W)
Ahhhhhhhhh, actually, above should be Port FABxh rather than F4Xxh !!! (?) Ie. first write data to F4XXh, then issue write to FABxh (with /CS and A0,A1)
Clock Input for RX/TX is 4MHz, Clock output goes to a [[8251 USART chip]],
Clock Output may be further divided by 1, 16, or 64 in the 8251 chip,
