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      15  14  13  12  11  10   9   8   7   6   5   4   3   2   1   0
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
ADD  | 0   0   0   1 |     DR    |    SR1    | 0 | 0   0 |    SR2    |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
ADD  | 0   0   0   1 |     DR    |    SR1    | 1 |       imm5        |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
AND  | 0   1   0   1 |     DR    |    SR1    | 0 | 0   0 |    SR2    |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
AND  | 0   1   0   1 |     DR    |    SR1    | 1 |       imm5        |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
BR   | 0   0   0   0 | n | z | p |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
JMP  | 1   1   0   0 | 0   0   0 |   BaseR   | 0   0   0   0   0   0 |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
JSR  | 0   1   0   0 | 1 |               PCoffset11                  |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
JSRR | 0   1   0   0 | 0 | 0   0 |   BaseR   | 0   0   0   0   0   0 |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
LD   | 0   0   1   0 |     DR    |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
LDI  | 1   0   1   0 |     DR    |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
LDR  | 0   1   1   0 |     DR    |   BaseR   |        offset6        |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
LEA  | 1   1   1   0 |     DR    |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
NOT  | 1   0   0   1 |     DR    |     SR    | 1   1   1   1   1   1 |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
RET  | 1   1   0   0 | 0   0   0 | 1   1   1 | 0   0   0   0   0   0 |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
RTI  | 1   0   0   0 | 0   0   0   0   0   0   0   0   0   0   0   0 |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
ST   | 0   0   1   1 |     SR    |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
STI  | 1   0   1   1 |     SR    |             PCoffset9             |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
STR  | 0   1   1   1 |     SR    |   BaseR   |        offset6        |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
TRAP | 1   1   1   1 | 0   0   0   0 |          trapvect8            |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+
N/A  | 1   1   0   1 |                                               |
     +---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+---+