Right on. Thanks. I wish I could get a second revision of the bin... seeing differences would help. I'll give it a shot and see what up.

There's probably a better place to ask but this is the only site I know with knowledgeable people. I'm working on a old nippondenso ECU from a honda cx500 motorcycle that runs a 2716 EPROM with 2K memory. IF I'm able to find and modify the fuel tables will I need to calculate and store the checksum ...