undocumented opcodes added to ncpu

[fceu.git] / ops.h

diff --git a/ops.h b/ops.h
index a652a88..c5004d8 100644 (file)
--- a/ops.h
+++ b/ops.h
@@ -57,12 +57,15 @@ case 0x28: /* PLP */
            break;
 case 0x4C:
          {
-          uint16 ptmp=_PC;
           unsigned int npc;
-
+/*
+          uint16 ptmp=_PC;
           npc=RdMem(ptmp);
           ptmp++;
           npc|=RdMem(ptmp)<<8;
+*/
+          npc=RdMem(_PC++);
+          npc|=RdMem(_PC++)<<8;
           _PC=npc;
          }
          break; /* JMP ABSOLUTE */
@@ -76,12 +79,12 @@ case 0x6C:
           break;
 case 0x20: /* JSR */
           {
-           uint8 npc;
+           uint32 npc;
            npc=RdMem(_PC++);
             PUSH(_PC>>8);
             PUSH(_PC);
-            _PC=RdMem(_PC)<<8;
-           _PC|=npc;
+            npc|=RdMem(_PC++)<<8;
+           _PC=npc;
           }
            break;