I just wanted to post this so that there is no more confusion.. from the processor manual page 2400.
•RESET / etc (Dedicated)
Ball Name I/O Description
XOM_0 ~ XOM_5 I Operating Mode control signals (6bit)
The OM pins are INPUTS. INPUTS cannot be changed by software running on that chip. The OM registers are tied to hard lines. if the pin goes high, the register goes high, if the pin goes low, the register goes low... You can't override an input which is a part of the processor. it's a hardware thing.
If you were to find something on the board, look for resistors in a pattern like this...
0X00X0... The 0s or Xs might be resistors or opens, but it would be in that pattern to make the OM=0X9 which would be binary 010010 for a 6 bit register.
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