| Value | Meaning |
|---|---|
| startModeBeginSequence0 | The start mode used the first time when _step is called. |
| startModeContinueSequence1 | The start mode used when _step is called after coming back from a STEP_PUSH_STACK_BIT. |
| startModeResumeYield2 | The start mode used when _step is called after resuming from STEP_YIELD_BIT. |