41CL Calculator schematic (pdf, V2 board revision)

41CL Calculator schematic (pdf, V3 board revision)

Timer Module schematic (pdf, preliminary)

Part number BC20213-6 from www.cableclub.com connects the 41CL
to a PC serial port.

The Flash memory on the board can be reprogrammed via JTAG.
We use TopJTAG software and the JTAG-USB hardware.