starting on sprites

bun.c

@@ -42,7 +42,7 @@
 // linked as raw bytes in assembler
 extern unsigned char far coolbun[];
 
-unsigned char *coolbunArea;
+unsigned char *coolbunArea = 0;
 
 #define BLTCON0( \
   minterm, aChan, bChan, cChan, dChan, shift \
@@ -62,7 +62,9 @@ void setupBun(void) {
 }
 
 void teardownBun(void) {
-  FreeMem(coolbunArea, COOL_BUN_MEMORY_SIZE);
+  if (coolbunArea) {
+    FreeMem(coolbunArea, COOL_BUN_MEMORY_SIZE);
+  }
 }
 
 void bun_offRightSide(

main.c

@@ -36,10 +36,31 @@ void *copperlistSpritePointers[8];
 #define offsetof(s, m) &((struct s *)0)->m
 uint16_t custom_color = (uint16_t)offsetof(Custom, color);
 uint16_t custom_sprite = (uint16_t)offsetof(Custom, sprpt);
+uint16_t custom_sprite_control = (uint16_t)offsetof(Custom, spr);
+
+uint16_t chip spriteData[200];
+
+uint16_t spritePositionsEachLine[256][2];
+
+void calculageSpritePositionsEachLine() {
+  int i;
+
+  for (i = 0; i < 255; ++i) {
+
+  }
+}
+
+#define SPRPOS(x, y) (((y & 0xff) << 8) + ((x & 0x1fe) >> 1))
+#define SPRCTL(x, y, height) ( \
+  ((height & 0xff) << 8) + \
+  ((y & 0x100) >> 6) + \
+  ((height & 0x100) >> 7) + \
+  (x & 1) \
+)
 
 int main(void) {
   uint16_t *copperlist, *currentCopperlist, result;
-  int i, y, plane;
+  int i, x, y, height, plane;
 
   struct BunRenderer bunRenderer;
 
@@ -50,12 +71,31 @@ int main(void) {
   colors[2] = 0x0fff;
   colors[3] = 0x000f;
 
+  printf("%p\n", &spriteData);
   printf("setting up, i haven't crashed...yet.\n");
 
+  x = 150;
+  y = 100;
+  height = y + 98;
+
+  printf("%d, %d, %d\n", x, y, height);
+
+  spriteData[0] = SPRPOS(x, y);
+  spriteData[1] = SPRCTL(x, y, height);
+
+  printf("%0x %0x\n", spriteData[0], spriteData[1]);
+
+  for (i = 2; i < 198; ++i) {
+    spriteData[i] = 0xffff;
+  }
+
+  spriteData[198] = 0x0000;
+  spriteData[199] = 0x0000;
+
   setupScreen(&screenSetup, SCREEN_WIDTH, SCREEN_HEIGHT, 3);
   setupInitialCurrentScreen(&screenSetup, &currentScreen);
 
-  setupBunRenderer(&bunRenderer, &screenSetup, &currentScreen);
+  //setupBunRenderer(&bunRenderer, &screenSetup, &currentScreen);
 
   // blitter copy the first bitplane row down to the second
 
@@ -87,7 +127,31 @@ int main(void) {
   *(currentCopperlist++) = custom_color + 6;
   *(currentCopperlist++) = 0x00F;
 
+  // sprites
+  *(currentCopperlist++) = custom_color + 34;
+  *(currentCopperlist++) = 0xF0F;
+
+  *(currentCopperlist++) = custom_color + 36;
+  *(currentCopperlist++) = 0xFF0;
+
+  *(currentCopperlist++) = custom_color + 38;
+  *(currentCopperlist++) = 0x00F;
+
+  *(currentCopperlist++) = custom_sprite;
+  *(currentCopperlist++) = ((uint32_t)&spriteData >> 16);
+
+  *(currentCopperlist++) = custom_sprite + 2;
+  *(currentCopperlist++) = ((uint32_t)&spriteData & 0xffff);
+
   for (y = 0; y < 256; ++y) {
+    if (y > 100) {
+      *(currentCopperlist++) = custom_sprite_control;
+      *(currentCopperlist++) = SPRPOS(60 + y, y);
+
+      *(currentCopperlist++) = custom_sprite_control + 2;
+      *(currentCopperlist++) = SPRCTL(60 + y, y, 0);
+    }
+
     *(currentCopperlist++) = 1 + (31 << 1) + ((44 + y) << 8);
     *(currentCopperlist++) = 0xFFFE;
     *(currentCopperlist++) = custom_color;
@@ -102,6 +166,7 @@ int main(void) {
   endCopperlist(currentCopperlist);
 
   for (i = 0; i < 200; ++i) {
+    /*
     swapCurrentScreenBuffer(&screenSetup, &currentScreen);
 
     for (plane = 0; plane < 2; ++plane) {
@@ -116,13 +181,14 @@ int main(void) {
       WaitBlit();
     }
 
-    renderBunFrame(i, &bunRenderer);
+    //renderBunFrame(i, &bunRenderer);
 
     updateDisplayInCopperList(
       &screenSetup,
       &currentScreen,
       copperlistBitplanePointers
     );
+  */
 
     WaitTOF();
   }
@@ -135,6 +201,10 @@ int main(void) {
 
   giveBackSystem();
 
+  for (i = 10; i < 50; ++i) {
+    printf("%x ", copperlist[i]);
+  }
+
   teardownScreen(&screenSetup);
 
   freeCopperlist(copperlist);

system/copper.c

@@ -20,7 +20,7 @@ uint16_t * prepareNewCopperlist(void) {
 
 void setCopperlist(uint16_t *copperlist) {
   custom.cop1lc = copperlist;
-  //custom.copjmp1 = 1;
+  custom.copjmp1 = 1;
 }
 
 void freeCopperlist(uint16_t *copperlist) {

system/system.s

@@ -111,7 +111,7 @@ _takeOverSystem:
     MOVE.W #INTF_SETCLR|INTF_INTEN|INTF_COPER|INTF_VERTB,intena(A0) ; enable master interrupt, copper, and VBR
 
     MOVE.W #$7FFF,dmacon(a0)
-    MOVE.W #DMAF_SETCLR|DMAF_MASTER|DMAF_COPPER|DMAF_RASTER|DMAF_BLITTER,dmacon(A0)
+    MOVE.W #DMAF_SETCLR|DMAF_MASTER|DMAF_COPPER|DMAF_RASTER|DMAF_BLITTER|DMAF_SPRITE,dmacon(A0)
   MOVEM.L (SP)+,A2/A6
   RTS
 
@@ -147,7 +147,6 @@ NewLevel3VBI:
   MOVEM.L (SP)+,D0-A6
   RTE
 
-
 _giveBackSystem:
   MOVE.L A6,-(SP)
     LEA _custom,A0
@@ -307,7 +306,6 @@ _addDisplayToCopperlist:
     MOVE.L A1,D0
   MOVEM.L (SP)+,A2-A4/D2-D4
 
-
   RTS
 
 ; @stack *copperlist