From f4834d8d2f46125721aae76553573a00635fc007 Mon Sep 17 00:00:00 2001
From: David Haywood <mamehaze@users.noreply.github.com>
Date: Fri, 11 Oct 2013 02:58:37 +0000
Subject: [PATCH] new NOT WORKING Unknown Sidam Poker [ANY]

(it's encrypted, he lists what is connected to what)
---
 src/mame/drivers/wallc.c | 80 ++++++++++++++++++++++++++++++++++++++++
 src/mame/mame.lst        |  1 +
 2 files changed, 81 insertions(+)

diff --git a/src/mame/drivers/wallc.c b/src/mame/drivers/wallc.c
index e28ae68fd10..02b6778dadb 100644
--- a/src/mame/drivers/wallc.c
+++ b/src/mame/drivers/wallc.c
@@ -67,6 +67,7 @@ public:
 	DECLARE_WRITE8_MEMBER(wallc_coin_counter_w);
 	DECLARE_DRIVER_INIT(wallc);
 	DECLARE_DRIVER_INIT(wallca);
+	DECLARE_DRIVER_INIT(sidam);
 	TILE_GET_INFO_MEMBER(get_bg_tile_info);
 	virtual void video_start();
 	virtual void palette_init();
@@ -359,5 +360,84 @@ ROM_START( wallca )
 	ROM_LOAD( "74s288.c2",  0x0000, 0x0020, CRC(83e3e293) SHA1(a98c5e63b688de8d175adb6539e0cdc668f313fd) )
 ROM_END
 
+/*
+
+It use a epoxy brick like wallc 
+Inside the brick there are:
+- 74245
+- 74368
+- Pal16r4
+
+74368 is a tristate not, it's used to:
+-nagate D0 that goes to the CPU if A15 is low 
+-nagate D1 that goes to the CPU if A15 is low 
+-nagate D2 that goes to the CPU if A15 is low 
+-nagate D3 that goes to the CPU if A15 is low 
+
+-negate cpu clk to feed the pal clk ALWAYS
+-negate A15 to feed 74245 /EN ALWAYS
+
+
+The 74245 let pass the data unmodifyed if A15 is high (like wallc)
+
+If A15 is low a Pal16r4 kick in
+this chip can modify D2,D3,D4,D5,D6,D7
+
+D0 and D1 are negated from outside to real Z80
+D2 and D3 are negated after begin modified by the Pal
+
+Pal input
+A1
+A3
+A6
+A15 (Output enable, not in equation)
+
+D2
+D3
+D4
+D5	(2 times)
+D7	(2 times)
+
+Pal output
+D2 (via not to cpu)
+D3 (via not to cpu)
+D4 to cpu
+D5 to cpu
+D6 to cpu
+D7 to cpu
+
+*/
+
+ROM_START( sidampkr )
+	ROM_REGION( 0x10000, "maincpu", 0 )
+	ROM_LOAD( "11600.0",     0x0000, 0x1000, CRC(88cac4d2) SHA1(a369da3dc80671eeff549077cf2ce860d5f4ea35) )
+	ROM_LOAD( "11600.1",     0x1000, 0x1000, CRC(96cca320) SHA1(85326f7126c8250a22f35f6eed138051a9ab35cb) )
+
+	ROM_REGION( 0x3000, "gfx1", 0 )
+	ROM_LOAD( "11605.b",     0x0800, 0x0800, CRC(a7800f8a) SHA1(3955e0f71ced6fd759f52d12c0b39ab6aab31ca4) )
+	ROM_LOAD( "11605.g",     0x1800, 0x0800, CRC(b7bebf1e) SHA1(764536989ba4c4c143a61d4453c3bba547bc630a) )
+	ROM_LOAD( "11605.r",     0x2800, 0x0800, CRC(4d645b8d) SHA1(d4f8d11c4ef796cf66ebf2e6b8a11247d630951a) )
+
+	ROM_REGION( 0x0020, "proms", 0 )
+	ROM_LOAD( "11607-74.288",  0x0000, 0x0020, CRC(e14bf545) SHA1(5e8c5a9ea6e4842f27a47c1d7224ed294bbaa40b) )
+ROM_END
+
+DRIVER_INIT_MEMBER(wallc_state,sidam)
+{
+	UINT8 c;
+	UINT32 i;
+
+	UINT8 *ROM = memregion("maincpu")->base();
+
+	for (i=0; i<0x2000; i++)
+	{
+		c = ROM[ i ] ^ 0x0f; 
+		ROM[ i ] = c;
+	}
+
+
+}
+ 
 GAME( 1984, wallc,  0,      wallc,  wallc, wallc_state, wallc,  ROT0, "Midcoin", "Wall Crash (set 1)", 0 )
 GAME( 1984, wallca, wallc,  wallc,  wallc, wallc_state, wallca, ROT0, "Midcoin", "Wall Crash (set 2)", 0 )
+GAME( 1984, sidampkr,0,     wallc,  wallc, wallc_state, sidam,  ROT270, "Sidam", "Unknown Sidam Poker", GAME_NOT_WORKING )
diff --git a/src/mame/mame.lst b/src/mame/mame.lst
index fe3d99f6e6f..09f119742d3 100644
--- a/src/mame/mame.lst
+++ b/src/mame/mame.lst
@@ -9977,6 +9977,7 @@ thedeep         // (c) 1987 Wood Place
 rundeep         // (c) 1988 Cream (bootleg?)
 wallc           // (c) 1984 Midcoin
 wallca          // (c) 1984 Midcoin
+sidampkr		// 
 wink            // (c) 1985 Midcoin
 winka           // (c) 1985 Midcoin
 24cdjuke        // (c) 1988 Midcoin