DUART Hardware

Download DUART schematic [PDF 27kB]

  • IC1 - XR68C681
  • IC2 - 74HC245
  • IC3 - 74HC541
  • IC4 - 74HC32
  • IC5 - ICL7660
  • IC6 - ICL7660
  • IC7,IC9 - MC1489
  • IC8,IC10 - MC1488
  • X-TAL 3.6865 MHz
  • NMI - interrupt enable/disable
  • SELECT
    /CSEL0 = $DE00-$DE0F
    or
    /CSEL1 = $DE10-$DE1F

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