--------------------------------------------------------------------------------
-- ****
-- T80(c) core. Attempt to finish all undocumented features and provide
--              accurate timings.
--
-- Version 351.
-- Merged Gameboy fixes from Bruno Duarte Gouveia (brNX)
-- Passes Blargg's test ROMs
--
-- Version 350.
-- Copyright (c) 2018 Sorgelig
--  Test passed: ZEXDOC, ZEXALL, Z80Full(*), Z80memptr
--  (*) Currently only SCF and CCF instructions aren't passed X/Y flags check as
--      correct implementation is still unclear.
--
-- ****
-- T80(b) core. In an effort to merge and maintain bug fixes ....
--
-- Ver 303 add undocumented DDCB and FDCB opcodes by TobiFlex 20.04.2010
-- Ver 301 parity flag is just parity for 8080, also overflow for Z80, by Sean Riddle
-- Ver 300 started tidyup.
--
-- MikeJ March 2005
-- Latest version from www.fpgaarcade.com (original www.opencores.org)
--
-- ****
-- Z80 compatible microprocessor core
--
-- Version : 0250
-- Copyright (c) 2001-2002 Daniel Wallner (jesus@opencores.org)
-- All rights reserved
--
-- Redistribution and use in source and synthezised forms, with or without
-- modification, are permitted provided that the following conditions are met:
--
-- Redistributions of source code must retain the above copyright notice,
-- this list of conditions and the following disclaimer.
--
-- Redistributions in synthesized form must reproduce the above copyright
-- notice, this list of conditions and the following disclaimer in the
-- documentation and/or other materials provided with the distribution.
--
-- Neither the name of the author nor the names of other contributors may
-- be used to endorse or promote products derived from this software without
-- specific prior written permission.
--
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-- AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-- THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-- PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE
-- LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-- CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-- SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-- INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-- CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-- ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-- POSSIBILITY OF SUCH DAMAGE.
--