= Digital Systems course archive of the University of Oxford
{title2=2018–2019 course record}
https://www.cs.ox.ac.uk/teaching/courses/2018-2019/digitalsystems/
The archived course record links the teaching site https://spivey.oriel.ox.ac.uk/corner/Digital_Systems, whose current process/message-based system material is at https://spivey.oriel.ox.ac.uk/corner/Micro:bian_(Digital_Systems). The latter is later documentation and does not establish an identical API for the <Phōs> release named in the held 2019 examination. The solutions specify the request, interrupt and reply contracts explicitly rather than claiming such a binding.
The 3 September 2019 resit paper names <Phōs> in question 2 and describes a sensor-driver process serving concurrent clients. Public archive: https://www.whatdotheyknow.com/request/ba_computer_science_past_papers/response/2577745/attach/2/202402%20183%20CS%20Papers.zip?cookie_passthrough=1[Oxford examination archive], member `2018/L/a10101w1.pdf`; the cover dates the paper despite its archive directory. This establishes the teaching context and process-based device-service example without specifying an implementation API.
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