ZiLOG Z8 - Port 2 Operation and Modes

El
Instruction forant:
ope
Operation:
Flags:
Example:
Cycles
6
IMR (7) <-- 1
EI
Enable Interrupts
ope
(Hex)
9F
Bit 7 of control register 251 (the Interrupt Mask Register) is set 10 to 1. This
allows
any potentially enabled interrupts to become enabled.
No flaqs affected
If control register 251 contains %OA (00001010, that is, interrupts IRQ1 and IRQ3
potentially enabled), the statement
EI
sets control register 251 to %8A (10001010) and enables these interrupts.
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