[ppu] Make struct pack bits for proper union

If not for the attribute flag, the proccesor
    would automatically makes padding between the
    elements of the struct since they jump over
    the byte boundary for efficiency purposes,
    making all elements easier to acces for the
    cpu. This however destroys our entire union, since
    its made with no paddin in mind, the attribute flag
    removes the padding

    +Makefile cleaning
    +*Reg.bits renamed to more appropriate .field

.gitignore

@@ -1,7 +1,9 @@
 media
 exec
+nesem
 *log*
 *cache*
 *.patch
 *.out
 *dump*
+*.json

Makefile

@@ -1,16 +1,17 @@
 CC = cc
-CFLAGS = -g -DDEBUG -static
+CFLAGS = -static -Ofast
+CDEBUGFLAGS = -g -DDEBUG -static
 RM = rm -rf
-OUTFILE = exec
+OUTFILE = nesem
 
 
 default: all
 
 all:
-	$(CC) bus.c cpu.c cartridge.c ppu.c -Ofast -o $(OUTFILE)
+	$(CC) $(CFLAGS) bus.c cpu.c cartridge.c ppu.c -o $(OUTFILE)
 
 clean:
 	$(RM) $(OUTFILE)
 	
 debug:
-	$(CC) $(CFLAGS) bus.c cpu.c ppu.c cartridge.c -o $(OUTFILE)
+	$(CC) $(CDEBUGFLAGS) bus.c cpu.c ppu.c cartridge.c -o $(OUTFILE)

bus.c

@@ -112,6 +112,13 @@ void activateCpuNmi(){
 
 int main(int argc, char * argv[]){
 
+    #ifdef DEBUG
+        locationRegister testbit;
+        testbit.data = 0;
+        testbit.field.fineY = 0xFF;
+        printf("%016x", testbit.data);
+    #endif
+
     activateCpuNmiBool = false;
 
     CPU * cpu = (CPU*)malloc(sizeof(CPU)); //create new CPU

ppu.c

@@ -28,12 +28,12 @@ fixed
 word resolveAttributeTableAddress(word regData){
     locationRegister n;
     n.data = regData;
-    byte trimmedCoarseX = n.bits.coarseX >> 2; //trim the lowest 2 bits of coarse X
+    byte trimmedCoarseX = n.field.coarseX >> 2; //trim the lowest 2 bits of coarse X
-    byte trimmedCoarseY = n.bits.coarseY >> 2; //trim the lowest 2 bits of coarse Y
+    byte trimmedCoarseY = n.field.coarseY >> 2; //trim the lowest 2 bits of coarse Y
 
     word ret = trimmedCoarseX | (trimmedCoarseY << 3); //YYYXXX
     ret = 0b1111 >> 6 | ret; //1111YYYXXX
-    ret = n.bits.nameTableID << 10 | ret; //NN1111YYYXXX
+    ret = n.field.nameTableID << 10 | ret; //NN1111YYYXXX
     ret = 0b10 << 12 | ret; //10NN1111YYYXXX
 
     return ret;
@@ -106,7 +106,7 @@ void ppuRegWrite(word address, byte data){
         case 0: //ppuctrl
 
             ppu.control.full = data;
-            ppu.tReg.bits.nameTableID = ppu.control.nameTableID;
+            ppu.tReg.field.nameTableID = ppu.control.nameTableID;
 
         break;
 
@@ -134,12 +134,12 @@ void ppuRegWrite(word address, byte data){
 
             if(ppu.expectingLsb){
                 //second write
-                ppu.tReg.bits.fineY = data & 0b00000111; //set fineY
+                ppu.tReg.field.fineY = data & 0b00000111; //set fineY
-                ppu.tReg.bits.coarseY = data >> 3; //set coarse Y
+                ppu.tReg.field.coarseY = data >> 3; //set coarse Y
             }else{
                 //first write
                 ppu.xReg = data & 0b00000111; //set fineX
-                ppu.tReg.bits.coarseX = data >> 3; //set coarse X
+                ppu.tReg.field.coarseX = data >> 3; //set coarse X
             }
 
             ppu.expectingLsb = !ppu.expectingLsb;
@@ -162,7 +162,7 @@ void ppuRegWrite(word address, byte data){
                 buf = buf | (ppu.tReg.data & 0xFF);
                 ppu.tReg.data = buf;
 
-                ppu.tReg.bits.fineY = ppu.tReg.bits.fineY & 0b011; //clear highest bit of fine Y
+                ppu.tReg.field.fineY = ppu.tReg.field.fineY & 0b011; //clear highest bit of fine Y
             }
 
             ppu.expectingLsb = !ppu.expectingLsb;

ppu.h

@@ -5,14 +5,20 @@
 
 typedef struct{
     union{
-        struct{
+        struct __attribute__((packed, aligned(1))){
-            byte unused : 1;
-            byte fineY : 3;
-            byte nameTableID : 2;
-            byte coarseY : 5;
             byte coarseX : 5;
+            byte coarseY : 5;
+            byte nameTableID : 2;
+            byte fineY : 3;
+            byte unused: 1;
+
+        }field;
+
+        struct{
+            byte lsb;
+            byte msb;
 
-        }bits;
+        }bytes;
 
         word data;
     };