From 6602ca87952ed1bced7cb30b7ed4673cb9d62dc4 Mon Sep 17 00:00:00 2001
From: Bruno Duarte Gouveia <bgouveia@gmail.com>
Date: Fri, 19 Jun 2020 18:23:21 +0100
Subject: [PATCH] T80: skip byte after a stop opcode, fixes the Konami
 Collection Startup bugs

---
 rtl/T80/T80_MCode.vhd | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/rtl/T80/T80_MCode.vhd b/rtl/T80/T80_MCode.vhd
index 8e85dbd..6985f57 100644
--- a/rtl/T80/T80_MCode.vhd
+++ b/rtl/T80/T80_MCode.vhd
@@ -1170,9 +1170,15 @@ begin
 		when "11101001" =>
 			-- JP (HL)
 			JumpXY <= '1';
-		when "00010000" =>
-			if Mode = 3 then
+		when "00010000" =>  
+			if Mode = 3 then -- STOP and skip next byte
+				MCycles <= "010";
 				I_DJNZ <= '1';
+				case to_integer(unsigned(MCycle)) is
+				when 2 =>
+					Inc_PC <= '1';
+				when others => null;
+				end case;
 			elsif Mode < 2 then
 				-- DJNZ,e
 				MCycles <= "011";