I've constructed a pic interface (12c508) using instructions found on the web. After some debugging, when I check it with the ocilliscope, it appears to be putting out serial data...
(-10 to +10v) to pin 2 of the serial plug. The serial data looks to have start and stop bits and appropriate 8 bits in between but it's hard to really see clearly on the scope. The packets appear to start with FF and have 8 more bytes followed by a pause.
With my comm port set to 19200 8n1, FMS running fine and the controls set to PIC interface...FMS does not see the data.
any suggestions on why? What should I try next?