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Altera_Forum
Honored Contributor
Honored ContributorFast data access with Nios II ?
I have tried to quickly access external data with a custom instruction. After I have realized, that 1 cycle-custom-instructions cannot have external connections, I implemented a 2-cycle custom instru...
Altera_ForumHonored Contributor
Honored ContributorHi BadOmen,
my custom-instruction-logic itself needs one cycle (i.e. it has one pipeline-stage), so it should be possible to implement it as an instruction that execute in 2 cycles (in fact I could also realize it without an pipeline-delay, as the data is already there before the instruction starts, but Nios2 does not allow me to have an external interface for 1-cycle instructions. Regards Thomas
