Nintendo Ultra64 Programmer's Manual page 172

CTC2
31
COP2
0 1 0 0 1 0
6
Format:
ctc2 rt, rd
Description:
The contents of general register
Operation:
T:
T + 1: CCR[rd]  data
Exceptions:
None
172
Move Control to
Coprocessor 2 (VU)
26 25 21 20
CT
0 0 1 1 0
5
rt
data  GPR[rt]
16 15 11 10
rt rd
5 5
are loaded into control register
CTC2
0
0 0 0 0 0 0 0 0 0 0 0
11
rd
of the VU (coprocessor unit
0
2).