update T80

rtl/T80/README

@@ -0,0 +1,58 @@
+--------------------------------------------------------------------------------
+-- ****
+-- 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.
+--