From b16b3120a84f1b180e874367d3101264479a595f Mon Sep 17 00:00:00 2001
From: Ian C <ianc@noddybox.co.uk>
Date: Wed, 4 Oct 2006 23:05:43 +0000
Subject: Development checkin

---
 source/main.c | 85 ++++++++++++++++++++++++++++++++++++++++++++---------------
 1 file changed, 64 insertions(+), 21 deletions(-)

(limited to 'source/main.c')

diff --git a/source/main.c b/source/main.c
index a5f5035..a2b0565 100644
--- a/source/main.c
+++ b/source/main.c
@@ -28,6 +28,7 @@
 #include "gui.h"
 
 #include "splashimg_bin.h"
+#include "zx81_bin.h"
 
 /* ---------------------------------------- STATIC DATA
 */
@@ -46,10 +47,12 @@ static void Splash(void)
     {
     	"DS81 \177 2006 Ian C",
 	" ",
-	"ZX81 ROM \177 1981",
+	"ZX81 ROM",
+	"\177 1981",
 	"Nine Tiles Networks LTD",
 	" ",
-	"3D MONSTER MAZE \177 1983",
+	"3D MONSTER MAZE",
+	"\177 1983",
 	"Malcom E. Evans",
 	" ",
 	"PRESS A TO CONTINUE",
@@ -62,18 +65,11 @@ static void Splash(void)
     sImage img;
     int f;
 
-    loadPCX(splashimg_bin,&img);
-    image8to16(&img);
-    dmaCopy(img.data8,BG_GFX,SCREEN_WIDTH*SCREEN_HEIGHT*2);
-
     FB_Clear();
 
-    for(f=0;f<SCREEN_HEIGHT;f++)
-    {
-	FB_HLine(0,SCREEN_WIDTH-1,f,FB_RGB(f/8,0,0));
-    }
-
-    FB_Box(0,0,SCREEN_WIDTH,SCREEN_HEIGHT,FB_RGB(31,31,31));
+    loadPCX(splashimg_bin,&img);
+    image8to16(&img);
+    dmaCopy(img.data8,BG_GFX_SUB,SCREEN_WIDTH*SCREEN_HEIGHT*2);
 
     for(f=0;text[f];f++)
     {
@@ -91,22 +87,69 @@ static void Splash(void)
 */
 int main(int argc, char *argv[])
 {
+    int ch;
+    uint8 *ch_data;
+
     powerON(POWER_ALL_2D);
 
-    videoSetMode(MODE_5_2D | DISPLAY_BG2_ACTIVE);
+    /* Set up main text screen and grab the ROM character data
+    */
+    videoSetMode(MODE_0_2D | DISPLAY_BG0_ACTIVE);
 
     vramSetBankA(VRAM_A_MAIN_BG_0x6000000);
-    BG2_CR = BG_BMP16_256x256;
-    BG2_XDX = 0x100;
-    BG2_XDY = 0;
-    BG2_YDX = 0;
-    BG2_YDY = 0x100;
-    BG2_CX = 0;
-    BG2_CY = 0;
+    vramSetBankB(VRAM_B_MAIN_BG_0x6020000);
 
-    videoSetModeSub(MODE_5_2D | DISPLAY_BG2_ACTIVE);
+    BG0_CR = BG_COLOR_256|BG_MAP_BASE(31)|BG_TILE_BASE(0);
+    BG0_X0 = 0;
+    BG0_Y0 = 0;
+
+    BG_PALETTE[0] = RGB15(31,31,31);
+    BG_PALETTE[1] = RGB15(0,0,0);
+    ch_data = (uint8*)BG_TILE_RAM(0);
 
+    for(ch=0;ch<64;ch++)
+    {
+	int r;
+
+	for(r=0;r<8;r++)
+	{
+	    int b;
+	    int rd;
+
+	    rd=zx81_bin[0x1e00+ch*8+r];
+
+	    for(b=7;b>=0;b--)
+	    {
+		if (rd&(1<<b))
+		{
+		    *ch_data = 1;
+		    *(ch_data+4096) = 0;
+		}
+		else
+		{
+		    *ch_data = 0;
+		    *(ch_data+4096) = 1;
+		}
+
+		ch_data++;
+	    }
+	}
+    }
+
+    {
+    uint16 *tiles;
+    tiles = (uint16*)BG_MAP_RAM(31);
+    for(ch=0;ch<128;ch++)
+    {
+    	*(tiles+(ch%32)+(ch/32)*32)=ch;
+    }
+    }
+
+    /* Set up the sub-screen for rotation (basically for use as a framebuffer)
+    */
+    videoSetModeSub(MODE_5_2D | DISPLAY_BG2_ACTIVE);
     vramSetBankC(VRAM_C_SUB_BG_0x6200000);
+
     SUB_BG2_CR = BG_BMP16_256x256;
     SUB_BG2_XDX = 0x100;
     SUB_BG2_XDY = 0;
-- 
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