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Masking in the 8085 is when certain interrupts are disabled, or masked, by instruction execution. TRAP is not maskable. INTR, RST7.5, RST6.5, and RST5.5 are maskable as a group with the EI and DI instructions. RST7.5, RST6.5, and RST5.5 are selectively maskable, even after the EI instruction, by using the RIM and SIM instructions.

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