* t     s    m
* i     e
* m     b
* e
* seb and csi are status truth table entries in hold mode
* m = 0 magnitude compare
* m = 1 twos-complement compare
15ns    1s   0s
215ns   0s   0s
300ns   0s   1s
640ns   1s   1s
800ns   0s   1s
900ns   0s   0s
1160ns  1s   0s
2000ns  0s   0s
2100ns  0s   1s
2200ns  0s   0s