HC11-based J1850 implementation and complete interface box to
communicate with the J1850 bus using the PC-Calibrator. It was requested that PC
Calibrator software be expanded to include ability to record J1850 data together with all
other hardware previously supported. Since J1850 protocol peripheral chips were
non-existent/hard to come by at that time, the whole hardware/software was developed from
The resulting J1850 interface box was using the serial port to
communicate with the PC.