Specifications

Altera Corporation 6–3
October 2007 Nios II Processor Reference Handbook
Nios II Processor Revision History
instruction to the instruction set, Altera consequently must update all
Nios II cores to recognize the new instruction. Table 6–2 lists revisions to
the Nios II architecture.
Core Revisions
Core revisions introduce changes to an existing Nios II core. Core
revisions most commonly fix identified bugs, or add support for an
architecture revision. Not every Nios II core is revised with every release
of the Nios II architecture.
Nios II/f Core
Table 6–3 lists revisions to the Nios II/f core.
Table 6–2. Nios II Architecture Revisions
Version Release Date Notes
7.2 October 2007
Added the
jmpi instruction.
7.1 May 2007 No changes.
7.0 March 2007 No changes.
6.1 November 2006 No changes.
6.0 May 2006
Added optional
cpu_resetrequest and cpu_resettaken signals
to all processor cores.
5.1 October 2005 No changes.
5.0 May 2005
Added the
flushda instruction.
1.1 December 2004
● Added cpuid control register.
● Updated break instruction specification to accept an immediate
argument for use by debugging tools.
1.01 September 2004 No changes.
1.0 May 2004 Initial release of the Nios II processor architecture.
Table 6–3. Nios II/f Core Revisions
Version Release Date Notes
7.2 October 2007
Implemented the
jmpi instruction.
7.1 May 2007 No changes.
7.0 March 2007 No changes.
6.1 November 2006 No changes.
6.0 May 2006
Cycle count for
flushi and initi instructions changes from 1 to 4
cycles.