read54287$D40FNMISTNon Maskable Interrupt Statusboth
write54287$D40FNMIRESNon Maskable Interrupt Resetboth

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.

7DLI (Display List)
6VBI (Vertical Blank)
4not used
3not used
2not used
1not used
0not used

see also: Display List topics, VVBLKI, WARMSV

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