15. R4000 Processor Interrupts
15.2 Nonmaskable Interrupt (NMI)
The nonmaskable interrupt is caused either by an external write request to the R4000 or by a dedicated pin in the R4000. This pin is latched into an internal register by the rising edge of SClock.
Copyright 1996, MIPS Technologies, Inc. -- 21 MAR 96
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