J&S ecu for 5kT

[Gerard]

Orin,

You seem to know about the knock thing so thought I'd throw in a quick
question this thread. For what frequency does the OE knock sensor
(MAC11-MAC13) listen for and does it change the listening frequency
depending on engine rpm? I know it listens from 3k rpm and up. Do you
perhaps know if the conditioning circuitry in the Hitachi ECUs simply
trigger a interrupt input to the CPU or does the CPU do alot of the work
going through full input from the input conditioning circuitry?

Thanks.

G.