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);