Subversion Repositories tv80

OpenCores.org

ghutchis@opencores.org

General

private

XML

Extensible Markup Language

A synthesizable 8-bit microprocessor which is instruction-set compatable

with the Z80, targetted at embedded and system-on-a-chip designs.

Environment memory space is divided into a 32k ROM region and a 32k RAM

region, as follows:

  0000-7FFF:  ROM

  8000-FFFF:  RAM

Environment I/O space is allocated as follows:

  00-0F:  Unused

  10-1F:  Test devices

  20-7F:  Unused

  80-9F:  Environment control

  A0-FF:  Unused

The tv80 environment is controlled by the program under simulation.  The

program can affect the environment through a set of control registers,

which are mapped into I/O space.

        Write '01' to end simulation with test passed

        Write '02' to end with test failed

        Write '03' to turn on dumping

        Write '04' to turn off dumping

        Write characters to this port one at a time.  When the

        newline ('\n', ASCII 0x0A) character is written, the

        environment will print out the collected string.

        Bit[0] enables the timeout counter

        Bit[1] resets the counter to 0

        Timeout counter defaults to enabled at simulation start

        Holds 16-bit timeout value (amount of time in clocks before

        timeout error occurs).

        When set, starts a countdown (in clocks) until assertion of

        the INT_N signal.