> >Given this is current-users, and not port-i386, you are wrong.
> >Amigas have joystick/mouse ports on the motherboard.
> >And so do Atari STs.
> 
> Are they truly PC-compatible analog joystick ports?  i.e. is there a
> single byte-wide memory location which has joystick button status bits
> in the four MSBs and one-shot outputs for the joystick axes in the
> four LSBs?

The Amiga joystick ports have digital inputs and two analog inputs which
have an RC time constant (where R is the potentiometer inside the "joystick")
which generates pulses for an 8-bit counter which must be read and cleared
in software.  A bit better than the PC hardware, but still not a real A/D
converter.

  -jm

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