| Bits | Description |
|---|
| 7:6 | Start control (soft reset = 00)
00 = Copper fully stopped
01 = Copper start, execute the list from index 0, and loop to the start
10 = Copper start, execute the list from last point, and loop to the start
11 = Copper start, execute the list from index 0, and restart the list
when the raster reaches position (0,0) |
| 2:0 | Copper instruction memory address MSB (soft reset = 0) |
Notes:
(Copper addresses range over 0 - 0x7FF = 2K)
Writing the same start control value does not reset the copper