op_bin

Convert an operand of the item (instruction or data) to a binary number
     ea  - linear address
      n  - number of operand
             0 - the first operand
             1 - the second, third and all other operands
             -1 - all operands
Note: the data items use only the type of the first operand
Returns: 1-ok, 0-failure

success op_bin(long ea, int n);

// Convert an operand of the item (instruction or data) to an octal number

success op_oct(long ea, int n);

// Convert operand to decimal, hex, char

success op_dec(long ea, int n);
success op_hex(long ea, int n);
success op_chr(long ea, int n);