Minor changes

1 files changed, 24 insertions, 8 deletions

diff --git a/src/vcpu.c b/src/vcpu.c
index e35d07e..f38ba01 100644
--- a/src/vcpu.c
+++ b/src/vcpu.c
@@ -13,7 +13,7 @@ unsigned short S;
 
 // General purpose registers (8 bits each)
 // Note last one often used as a flag register
-unsigned char R[16];
+unsigned char V[16];
 
 // Delay timer (8 bits)
 unsigned char DT;
@@ -34,19 +34,35 @@ void VCPUFetch(){
 }
 
 void VCPUDecode(){
-  char X=(State.opcode<<4) & 0xF0;
-  char Y=(State.opcode<<8) & 0xF0;
-  char N=(State.opcode<<12) & 0xF0;
-  char NN=(State.opcode<<8) & 0xFF;
-  short NNN=(State.opcode<<4) & 0xFFF0;
+  State.X=(State.opcode<<4) & 0xF0;
+  State.Y=(State.opcode<<8) & 0xF0;
+  State.N=(State.opcode<<12) & 0xF0;
+  State.NN=(State.opcode<<8) & 0xFF;
+  State.NNN=(State.opcode<<4) & 0xFFF0;
 }
 
 void VCPUExecute(){
-  switch(State.opcode){
-  case 0x00E0:
+  switch(State.opcode & 0xF){
+  case 0x0:
     ScreenClear();
     break
       ;;
+  case 0x1:
+    PC=State.NNN;
+    break
+      ;;
+  case 0x6:
+    V[State.X]=State.NN;
+    break
+      ;;
+  case 0x7:
+    V[State.X]+=State.NN;
+    break
+      ;;
+  case 0xA:
+    I=State.NNN;
+    break
+      ;;
 
   }
 }