From bdfb1446957bd40543ef294a7a16726614918b7f Mon Sep 17 00:00:00 2001
From: damdoum <damdoum@users.sf.net>
Date: Tue, 9 Jan 2007 13:59:38 +0000
Subject: [PATCH] tried to add core A - direct RAM display mode

---
 desmume/src/GPU.c | 13 +++++++++++++
 desmume/src/GPU.h | 12 ++++++++++--
 2 files changed, 23 insertions(+), 2 deletions(-)

diff --git a/desmume/src/GPU.c b/desmume/src/GPU.c
index 33fa663d7..835095726 100644
--- a/desmume/src/GPU.c
+++ b/desmume/src/GPU.c
@@ -143,6 +143,19 @@ void GPU_setVideoProp(GPU * gpu, u32 p)
 			gpu->vramBlock = cnt->VRAM_Block;
 			return;
 		case 3: // Display from Main RAM
+			{
+				/* would need a test to see if it works */
+// 				u16 x,y; u32 c;
+// 				u16 * dst = GPU_screen;
+// 				for (y=0; y<192; y++)
+// 				for (x=0; x<256; x+=2) {
+// 					c = FIFOValue(REG_DISPA_DISPMMEMFIFO);
+// 					T2WriteWord(dst, 0, c&0xFFFF); dst++;
+// 					T2WriteWord(dst, 0, c>>16); dst++;
+// 				}
+
+			}
+
 			LOG("FIXME: Display Mode 3 not supported(Display from Main RAM)\n");
 			return;
 	}
diff --git a/desmume/src/GPU.h b/desmume/src/GPU.h
index aeea6f183..5096c81db 100644
--- a/desmume/src/GPU.h
+++ b/desmume/src/GPU.h
@@ -27,6 +27,7 @@
 #include "ARM9.h"
 #include <stdio.h>
 #include "mem.h"
+#include "registers.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -278,7 +279,7 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
      u8 i8;
      u16 i16;
      u32 c;
-
+	
      // This could almost be changed to use function pointers
      switch (gpu->dispMode)
      {
@@ -304,7 +305,14 @@ static INLINE void GPU_ligne(Screen * screen, u16 l)
            }
            return;
         }
-        case 3: // Display from Main RAM(FIX ME)
+        case 3: 
+		// it is just a wild wild guess (WWG)
+		// I dont need a game using this mode ...
+		for (i=0; i<256;) {
+			c = FIFOValue(REG_DISPA_DISPMMEMFIFO);
+			T2WriteWord(dst, i << 1, c&0xFFFF); i++;
+			T2WriteWord(dst, i << 1, c>>16); i++;
+		}
            return;
      }