Vector 2 is the subroutine vector and separates each VDN variable into component parts.

Vector 2
1. set A = V1 SEL 12 [A = 1001 when V1 = 100110021003 since A being of length 4 is assigned only the leftmost 4 digits]
2. set B = V1 SEL 8 [B = 1002 since SEL selects 10021003 and B being of length 4 is assigned only the leftmost 4 digits]
3. set C = V1 SEL 4 [C = 1003 since SEL selects the rightmost 4 digits]
4. set D = V2 SEL 4 [D = 11 when V2 = 1112 since D being of length 2 is assigned only the leftmost 2 digits]
5. set E = V2 SEL 2 [E = 12 since SEL selects the rightmost 2 digits]
6. set F = V3 SEL 12 [this step and following functions the same as for A, B, and C]
7. set G = V3 SEL 8
8. set H = V3 SEL 4