It would be nice to have 4 new modes for FILT that would enable it to do bitwise addition, subtraction, multiplication, and division. These could have the TMP values of 12, 13, 14, and 15, respectively.

Each of these would use the incoming PHOT/BRAY as one operand, and the CTYPE of the FILT as the other operand. Having this feature added to FILT would allow more compact ALUs and computers to be made that could deal with more bits. Instead of needing to make a large full adder that works off of FILT, you could use a single pixel to add two 30-bit binary numbers.

For example, assume there is a pixel of FILT with its mode set to addition and a ctype of 50. If a photon passes through it that has a ctype of 60, the photon will now take on the ctype of 110.