Open hardware and logic circuits by Roger Nurse
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The document discusses open hardware, particularly its relationship with logic circuits, which are fundamental to digital technology. It outlines the design and usefulness of both simple and complex logic circuits, emphasizing the benefits of freely available designs and open-source methodologies. The work notably references key figures and works in computer architecture, highlighting the potential advantages of accessible processor design information.
Open hardware and logic circuits by Roger Nurse
- 1. B Y R O G E R N U R S E Open Hardware and Logic Circuits
- 2. Open Hardware Open source hardware consists of physical artefacts of technology designed and offered by the open design movement (wiki definition) The term usually means that information about the hardware is easily discerned Hardware design (i.e. mechanical drawings, schematics, bills of material, PCB layout data, HDL source code and integrated circuit layout data), in addition to the software that drives the hardware, are all released with the FOSS approach.
- 3. Focus Open hardware and logic circuits What are logic circuits? How are they useful? How are they designed? The effect of open hardware on logic circuits Hennessy and Patterson, MIPS and a strong case for open hardware
- 4. What are logic circuits? Basis for the digital revolution An abstraction of basic Boolean logic constructs Circuits built upon implementations of the Boolean AND, OR and NOT functions
- 5. How are they useful?
- 6. How are they designed? Simple digital circuits: Designed using simulating and implementation software where chips are connected to build simple logic circuits
- 7. How are they designed? Complex digital circuits: Designed primarily using a hardware description language (HDL). Most popular HDLs are VHDL and Verilog. More complex and feature rich environments are used for design:
- 8. The Effect of Open Hardware on Logic Circuits Freely available chip designs and schematics Review of existing designs and possible improvement Integration of existing designs into more complex and feature rich systems Sky is the limit
- 9. Hennessy and Patterson, MIPS Intel 4004, first commercial microprocessor and the rise of the complex instruction set computer (CISC) Hennessy and Patterson, The birth of RISC and the creation of MIPS Intel change of direction Imagine the potential benefits if the Intel processor design information was readily available
- 10. Reference Material The elements of computing systems, Noam Nisan and Shimon Schochken Computer Organization and Design, John Hennessy and David Patterson Digital Design and Computer Architecture, David Harris and Sarah Harris Open Source Software - Wiki
- 11. B Y R O G E R N U R S E Questions and Comments