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* J6: Select if GPIO3 connects to the 8051 reset pin or to the
* J7: If using the ATMega8515, selects the "mode". This is used to enable optional logic, and should normally be in "NORM" mode.
The "Target-Defined Header" at J15 is used to set pins P3.3/P3.4/P3.5 to high/low. These pins each contain pull-downs, and mounting a header will set the associated pin high as shown below:
todo
If using the program/verification mode, the following additional settings allow indexing of the full 16K-bytes of the 87C51RB device:
* Jumper from LED2 to LED3.
* Jumper from LED1 to Pin 1 of J6 (the left-most pin).