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Recent content by valter

  1. V

    [SOLVED] Electronic problem with matrix keyboard using 8086

    Thanks Brian for advice.
  2. V

    [SOLVED] Electronic problem with matrix keyboard using 8086

    Thanks for reply About first note: This encoder can't carry zero on all lines which is needed to capture pressed key. First is used to generate zero on all lines (in the first time), after NMI is called the first 8282 sends 1 on all lines except one, that zero bit is shifted while proper row is...
  3. V

    [SOLVED] Electronic problem with matrix keyboard using 8086

    Hi, I have problem with eletronic in this matrix keyboard (professor told me that). First with 8282 I send zero on all 8 lines and wait key to be pressed. Before any key is pressed all lines in AND port is all 1. When key is pressed one of the 13 lines is zero and the NMI interrupt is called...
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