1 files changed, 5 insertions, 4 deletions
diff --git a/src/vcpu.h b/src/vcpu.h
index dbcba0a..fccd397 100644
--- a/src/vcpu.h
+++ b/src/vcpu.h
@@ -25,10 +25,10 @@ typedef struct VCPU_State {
 
   // Intruction (opcode + decoded fields)
   unsigned short opcode;
-  char X;
-  char Y;
-  char N;
-  char NN;
+  unsigned char X;
+  unsigned char Y;
+  unsigned char N;
+  unsigned char NN;
   unsigned short NNN;
 } VCPU_State;
 
@@ -36,4 +36,5 @@ void VCPUInit();
 void VCPUFetch();
 void VCPUDecode();
 void VCPUExecute();
+void VCPUDoubleDabble(unsigned char x, unsigned char *u, unsigned char *t, unsigned char *h);
 void VCPUDump();