6K Software - Task Swapping (Multi-Tasking Feature)
When multi-tasking, the TSWAP command will show what tasks are active. ONCOND and ERROR conditions will turn TSWAP active.
1%ERROR1 regardless of whether an ERRORP program has been defined or not will make TSWAP respond *TSWAP1.
1%ERROR0 (as long as they are all zeros and there is no other condition being waited on) will then make TSWAP respond with *TSWAP0.