Lpc2000

Hello,

With the mag card reader I am using, You  have a strobe that
tells you something is about to happen, then a clock and a
data pin for the transfer.

The clock depends on the speed the card is swiped.  Even if
you have a motorized version, the speed is not that predictable.

Upon the attention strobe I set up the ints for detecting the
clock pulses for each channel.  I had to reprogram the int direction
flag each transition (low-to-high then switch to high-to-low) int
so I could get both states.

The fun comes in when you write code to detect swipes in both
directions (data comes in backwards)!

Glen