From 4b3ff7d86485dea579af0d8fd983a36a1e9295ea Mon Sep 17 00:00:00 2001
From: Michael Gernoth <michael@gernoth.net>
Date: Mon, 19 May 2008 22:43:10 +0200
Subject: [PATCH 1/1] fix clock for LRAM

---
 galaxian/src/mc_bram_if.v | 2 +-
 galaxian/src/mc_clock.v   | 9 ++++++++-
 galaxian/src/mc_top.v     | 5 ++++-
 galaxian/src/mc_video.v   | 4 +++-
 4 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/galaxian/src/mc_bram_if.v b/galaxian/src/mc_bram_if.v
index 1374c92..edbcdd0 100644
--- a/galaxian/src/mc_bram_if.v
+++ b/galaxian/src/mc_bram_if.v
@@ -282,7 +282,7 @@ RAMB4_S8 LRAM(
 .DI({3'b000,I_D}),
 .DO(W_D),
 .EN(1'b1),
-.WE(~I_WE),
+.WE(I_WE),
 .RST(1'b0)
 
 );
diff --git a/galaxian/src/mc_clock.v b/galaxian/src/mc_clock.v
index 5ccfbd6..36925f3 100644
--- a/galaxian/src/mc_clock.v
+++ b/galaxian/src/mc_clock.v
@@ -20,7 +20,8 @@ module mc_clock(
 I_CLK_36M,
 O_CLK_18M,
 O_CLK_12M,
-O_CLK_06M
+O_CLK_06M,
+O_CLK_06Mn
 
 );
 
@@ -28,6 +29,7 @@ input I_CLK_36M;
 output O_CLK_18M;
 output O_CLK_12M;
 output O_CLK_06M;
+output O_CLK_06Mn;
 
 // 2/3 clock divider(duty 33%)
 //I_CLK   1010101010101010101
@@ -68,10 +70,15 @@ assign O_CLK_18M = CLK_18M;
 
 // 1/3 clock divider (duty 50%)
 reg CLK_6M;
+reg CLK_6Mn;
+
 always @(posedge O_CLK_12M)
 begin
    CLK_6M  <= ~CLK_6M;
+   CLK_6Mn <= CLK_6M;
 end
+
 assign O_CLK_06M = CLK_6M;
+assign O_CLK_06Mn = CLK_6Mn;
 
 endmodule
diff --git a/galaxian/src/mc_top.v b/galaxian/src/mc_top.v
index 0232f76..99206f3 100644
--- a/galaxian/src/mc_top.v
+++ b/galaxian/src/mc_top.v
@@ -93,6 +93,7 @@ wire   W_CLK_18M;
 wire   W_CLK_36M;
 wire   W_CLK_12M,WB_CLK_12M;
 wire   W_CLK_6M,WB_CLK_6M;
+wire   W_CLK_6Mn;
 wire   W_STARS_CLK;
 
 mc_dcm clockgen(
@@ -148,7 +149,8 @@ mc_clock MC_CLK(
 .I_CLK_36M(W_CLK_36M),
 .O_CLK_18M(W_CLK_18M),
 .O_CLK_12M(WB_CLK_12M),
-.O_CLK_06M(WB_CLK_6M)
+.O_CLK_06M(WB_CLK_6M),
+.O_CLK_06Mn(W_CLK_6Mn)
 
 );
 
@@ -443,6 +445,7 @@ mc_video MC_VID(
 .I_CLK_18M(W_CLK_18M),
 .I_CLK_12M(W_CLK_12M),
 .I_CLK_6M(W_CLK_6M),
+.I_CLK_6Mn(W_CLK_6Mn),
 .I_H_CNT(W_H_CNT),
 .I_V_CNT(W_V_CNT),
 .I_H_FLIP(W_H_FLIP),
diff --git a/galaxian/src/mc_video.v b/galaxian/src/mc_video.v
index a12155d..84f2397 100644
--- a/galaxian/src/mc_video.v
+++ b/galaxian/src/mc_video.v
@@ -29,6 +29,7 @@ module mc_video(
 I_CLK_18M,
 I_CLK_12M,
 I_CLK_6M,
+I_CLK_6Mn,
 I_H_CNT,
 I_V_CNT,
 I_H_FLIP,
@@ -60,6 +61,7 @@ O_COL
 input  I_CLK_18M;
 input  I_CLK_12M;
 input  I_CLK_6M;
+input  I_CLK_6Mn;
 input  [8:0]I_H_CNT;
 input  [7:0]I_V_CNT;
 input  I_H_FLIP;
@@ -377,7 +379,7 @@ mc_lram LRAM(
 
 .I_CLK(I_CLK_18M),
 .I_ADDR(W_LRAM_A),
-.I_WE(I_CLK_6M),
+.I_WE(I_CLK_6Mn),
 .I_D(W_LRAM_DI),
 .O_Dn(W_LRAM_DO)
 
-- 
2.39.5