Answer / guest

maskable interrupts are interrupts which can be masked or
ignored by some stI or clI instructions.non maskable
interrupts can not be ignored.

Answer / guest

rst 5.5,6.5,7.5 are maskable and trap is only the
unmaskable.means which can't be delayed.

Answer / venki

maskable interrupts controlled by the programmer where as
nmi are controlled by the system

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