Hi all,
I am trying to figure out how an 8259 OCW2 register behaves, more specifically if the "Automatic Rotation" bits of OCW2 are latched or not.
For example, if I want to automatically rotate interrupt priorities on a Non-Specific EOI, do I
a) Issue a "Rotate on non-specific EOI command" to OCW2 during initialisation and then issue a Non-Specific EOI at the end of my ISR.
or
b) I issue a "Rotate on non-specific EOI command" at the end of my ISR.
Thanks Hans.