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  1. // part of NeoGS project (c) 2008 NedoPC
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  3. /*
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  5. input interface of every DMA end-user
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  7. clocks: ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^
  8. reqN    _______/```````````\______________/`````````````````\______________/``````````````````
  9. ackN    ________________/``\_____________________________/``\____________________/``\__/``\__/
  10. doneN   _________________________/``\_____________________________/``\______________/``\__/``\
  11. rnwN    -------/```````````\--------------\_________________/--------------/````````\_____/```
  12. adrwdN  -------< read addr >--------------< write addr&data >--------------< rdaddr X wra X rd
  13. rdN     -------------------------<dd>-----------------------------------------------<dd>------
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  16. sequencing algorithm
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  21. */
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