cpuの状態的にはhello worldがちゃんとうごいている

kamiyaowl · Aug 18, 2019 · ca93ca4 · ca93ca4
1 parent 862946a
commit ca93ca4
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/nes/cpu_instruction.rs b/src/nes/cpu_instruction.rs
@@ -248,7 +248,7 @@ impl Cpu {
     /// jump
     /// `dst_addr` - Addressing Absolute/Indirectで指定されたJump先Address
     pub fn inst_jmp(&mut self, dst_addr: u16) {
-        self.pc = dst_addr + 1;
+        self.pc = dst_addr; // JMPはどうやら1個前に戻すらしい
     }
     /// jump to subroutine
     /// `dst_addr` - Addressing Absoluteで指定されたJump先Address