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EI (SPC700): Difference between revisions

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'''EI''' (Enable Interrupts) is an [[SPC700]] instruction that sets the [[interrupt enable flag]].
'''EI''' (Enable Interrupts) is an [[SPC700]] instruction that sets the [[interrupt enable flag]].


The manual has a typo where the flag which is set is in the [[zero flag]]'s position instead.
As the [[S-SMP]] has no hardware interrupt sources, EI is not very useful.


As the [[S-SMP]] has no hardware interrupt sources, EI is not very useful.
No other flags are affected.


==== Syntax ====
==== Syntax ====
Line 45: Line 45:
EI
EI
</pre>
</pre>
The official manual has a typo where the [[zero flag]] is set instead.


=== See Also ===
=== See Also ===
* [[DI]]
* [[DI]]
* [[RETI]]
* [[RETI]]
* [[BRK (SPC700)]]
* [[CLI]]
* [[CLI]]
* [[SEI]]
* [[SEI]]

Latest revision as of 00:18, 14 August 2024

Basic Info
Addressing Mode Opcode Length Speed
Implied (type 2) A0 1 byte 3 cycles
Flags Affected
N V P B H I Z C
. . . . . 1 . .

EI (Enable Interrupts) is an SPC700 instruction that sets the interrupt enable flag.

As the S-SMP has no hardware interrupt sources, EI is not very useful.

No other flags are affected.

Syntax

EI

The official manual has a typo where the zero flag is set instead.

See Also

External Links