Changes

Z80

8 bytes removed, 25 September
/* Internal state */
The NMI vector is fixed at 0066h, regardless of the I register, and of the IM interrupt mode.
|-
| IFF1 || 1-bit || Main Instruction Fetch Interrupt Flip-Flop || Set when interrupts are enabled, cleared on disable.
When the CPU accepts a maskable interrupt, both IFF1 and IFF2 are automatically cleared, inhibiting further interrupts.
|-
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