MODES OF 8259
1) FULLY NESTED MODE
This is a general purpose mode where all IR's are arranged in highes to lowest.
IR0 highest and IR7 lowest.
2) AUTOMATIC ROTATION MODE
In this mode a device after being serviced receives the lowest priority.
3) SPECIFIC ROTATION MODE
In this user can select any IR for lowest priority thus fixing all priorities.
At least improve your hand writing!!
ReplyDeleteSorry. I am working on that.
ReplyDeleteHelped a lot. Thank you
ReplyDeleteHelped
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