Table 1. Instruction format of each architecture.
| MuSe architecture | R-Type | Field | Opcode | is_jump | is_imm | rs | rt | rd | Unused | Total |
| Bit | 3 | 1 | 1 | 3 | 3 | 3 | 2 | 16 | ||
| I-Type | Field | Opcode | is_jump | is_imm | rs | rt | Immediate | Total | ||
| Bit | 3 | 1 | 1 | 3 | 3 | 5 | 16 | |||
| J-Type | Field | Opcode | is_jump | is_imm | Label | Total | ||||
| Bit | 3 | 1 | 1 | 11 | 16 | |||||
| DoMe architecture | R-Type | Field | Opcode | control_bit | rt | rs | Function code | Total | ||
| Bit | 4 | 1 | 3 | 3 | 5 | 16 | ||||
| I-Type | Field | Opcode | control_bit | rt | Immediate | Total | ||||
| Bit | 4 | 1 | 3 | 8 | 16 | |||||