Cpu Generator - Cpugen (TM) Generates Customizable RISC CPU Cores

Cpu Generator - Cpugen (TM) Generates Customizable RISC CPU Cores


Category: Processor

Created: September 03, 2003

Updated: January 27, 2020

Language: VHDL

Other project properties

Development Status: Stable

WishBone compliant: No

WishBone version: n/a

License: n/a


Cpugen (TM) generates customizable RISC cpu cores.
It allows direct customization of address/data/instruction bus size,
interrupt handling, indirect addressing, data/instruction latency
timings and custom instructions definition.
It is targeted to low size FPGAs, easy to use and getting started with.
GNU VHDL source code provided.


1) Portability: vendor dependent blocks (ex. memory blocks) are kept separate from vendor independent logic. Customizable built-in assembler with data/instruction memory files generation; output file formats for the following environments: - Altera - Xilinx - binary - testbench 2) Configurability: In order to optimize logic resources and take advantage of FPGA flexibility; targeted to low size FPGAs; it permits to define: - address/data/instruction bus size - stack type/depth - interrupt - indirect address - data/instruction variable latency - custom instructions support 3) Graphical user interface:

4) Easy to use and getting started with: - Tutorial and example files are supplied with the package - Xilinx/Altera 4/8/16/32 bit cpu applications samples - GNU VHDL source code


- Current release 2.0
- VHDL simulations
- Tested on Altera and Xilinx evaluation boards
- Test/debug currently in progress

Please contact me for bugs reporting or for obtaining technical support.