Hi,
I found that on my OSBDM module, pin 2(gnd) is coupled to pin 4(reset) with a 0.7uF capacitor on the optional 16-pin MONO8 header to program the JB16, which does not exist in the schematic on page 11 (Figure 7. Open Source BDM Schematic)
of the Open_Source_BDM_Interface_User_Manual.pdf.
Would the cap be a problem for upgrading the firmware using USBICP.exe ?