.. _z80:

Z80
===

(Put abstract here)

------
Pinout
------

.. image:: _static/pinout1.png

.. list-table:: Pin description
    :name: pin-description-z80
    :header-rows: 1

    * - Pin #
      - Name
      - Type
      - Summary
    * - ``mprj_io[0]``
      - RSTD
      - I
      - Active low design reset
    * - ``mprj_io[1]``
      - BUSAK
      - O
      - Bus request acknowledge
    * - ``mprj_io[2]``
      - M1
      - O
      - Machine Cycle 1 pulse
    * - ``mprj_io[4]``
      - RD
      - O
      - Read Enable
    * - ``mprj_io[5]``
      - WR
      - O
      - Write Enable
    * - ``mprj_io[6]``
      - WAIT
      - I
      - Wait for memory
    * - ``mprj_io[7]``
      - RFSH
      - O
      - Memory refresh enable
    * - ``mprj_io[23:8]``
      - A[15:0]
      - O
      - Address Bus
    * - ``mprj_io[31:24]``
      - D[7:0]
      - IO
      - Bi-directional Data Bus
    * - ``mprj_io[32]``
      - NMI
      - I
      - Non-Maskable Interrupt Request
    * - ``mprj_io[33]``
      - INT
      - I
      - Interrupt Request
    * - ``mprj_io[34]``
      - HALT
      - O
      - Indicates Halt condition
    * - ``mprj_io[35]``
      - MREQ
      - O
      - Memory Request
    * - ``mprj_io[36]``
      - IOREQ
      - O
      - IO Peripheral Request
    * - ``mprj_io[37]``
      - BUSRQ
      - I
      - Bus Request