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8085: Set Interrupt Mask.

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lord loh.

lord loh.

Member
In the 8085 Assembly language instruction, SIM (Set Interrupt Mask), does the bit D3 that represent MSE-Mask Set Enable disable masking or also the interrupts...

A text book question says to write a code snippet to enable all interrupts...

The answer given is

Code: 
EI
SIM 80H

What is wrong in the below code?
Code: 
EI
SIM 00H

In the second code I am disabling the masking so does it disable the masking and gives all interrupts a free hand or does it diaable interrups all together?

Thanks in advance.
 
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