| R/W | ADR | HEXADR | NAME | DESCRIPTION | OS |
|---|---|---|---|---|---|
| read | 54287 | $D40F | NMIST | Non Maskable Interrupt Status | both |
| write | 54287 | $D40F | NMIRES | Non Maskable Interrupt Reset | both |
NMIST: NMI status, holds cause for the NMI interrupt in BITs 5, 6 and 7
NMIRES: Reset for NMIST. Clears the interrupt request register and resets all of the NMI status together.
| Bit | Interrupt |
|---|---|
| 7 | DLI (Display List) |
| 6 | VBI (Vertical Blank) |
| 5 | SYSTEM RESET |
| 4 | not used |
| 3 | not used |
| 2 | not used |
| 1 | not used |
| 0 | not used |
see also: Display List topics, VVBLKI, WARMSV
previous: NMIEN
