EIS
| Instruction Name | Enable Interrupt System |
| Mnemonic | EIS |
| CP1610 Clock Cycles | 4 |
| Interruptible | No |
| Opcode Range | $0002 |
| Input Flags | None |
| Output Flags | Interrupt Enable Flag |
| Addressing Mode | Implied |
The Enable Interrupt System (EIS) instruction sets the Interrupt Enable Flag. See the Interrupt Enable Flag documentation for more information.