Pascal Automation Controller

Discussion in 'General Discussion' started by jayantc11, Jun 21, 2012.

  1. jayantc11

    jayantc11

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    Would anyone be knowing what the internal architecture of a Pascal Automation Controlller is like? Is the architecture RISC or CISC? the registers etc?

    Thank You
     
    jayantc11, Jun 21, 2012
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  2. jayantc11

    Darren Senior Member

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    The user's logic code is compiled in PICED then runs in a virtual processor (in PICED or in the PAC).
     
    Darren, Jun 21, 2012
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  3. jayantc11

    jayantc11

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    The PAC does have some processor of its own to run the code right ? Which processor is that? For example most c bus touchscreens have the Intel Xscale processor.
     
    jayantc11, Jun 21, 2012
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  4. jayantc11

    Newman

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    The PAC runs on fairy dust and magic dandelions. ;)

    Seriously though, the PAC is not an embedded PC platform. It's an internally developed hardware platform running an internally developed operating system. The logic code is compiled, downloaded and executed by an internal sub-system within the unit. Then there's all the scheduling, time-keeping, serial I/O handling, etc. It's all specifically designed to be as reliable as possible. After all, it's not like a PC which you can re-boot if it BSOD's on you; it's an embedded device mounted goodness knows where with no visible user interface that has to just work for potentially years without a power cycle.

    If you can state clearly why you want to know the details of what's inside, or what you're trying to achieve, perhaps we can better answer your question.
     
    Newman, Jun 21, 2012
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  5. jayantc11

    NickD Moderator

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    I don't know where you got this information, but it's not correct.

    Nick
     
    NickD, Jun 22, 2012
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  6. jayantc11

    Darren Senior Member

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    The implementation of the logic engine is a heavily customised version of the p-code machine. The operation of the logic engine is completely independent of the underlying hardware.
     
    Darren, Jun 22, 2012
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