Refactor rewind functionality with circular buffer, update BufferedImageData handling in DisplayView, enhance ConsoleView rendering updates, and integrate SnakeCode data.

src/commonMain/kotlin/mtmc/asm/instructions/Instruction.kt

@@ -57,7 +57,7 @@ abstract class Instruction(
       if (ls != null) {
         return ls
       }
-      val jumpReg = JumpInstruction.disassemble(instruction)
+      val jumpReg = JumpRegisterInstruction.disassemble(instruction)
       if (jumpReg != null) {
         return jumpReg
       }
@@ -65,7 +65,7 @@ abstract class Instruction(
       if (jump != null) {
         return jump
       }
-      return "<unknown>"
+      return ""
     }
   }
 }

src/commonMain/kotlin/mtmc/asm/instructions/JumpRegisterInstruction.kt

@@ -26,10 +26,16 @@ class JumpRegisterInstruction(
 
   companion object {
     fun disassemble(instruction: Short): String? {
-      if (BinaryUtils.getBits(16, 5, instruction).toInt() == 9) {
+      if (BinaryUtils.getBits(16, 4, instruction).toInt() == 9) {
         val reg = BinaryUtils.getBits(4, 4, instruction)
-        val sb = StringBuilder("jr")
-        sb.append(fromInteger(reg.toInt()))
+        if (reg.toInt() == 11) {
+          return "ret"
+        } else {
+          val sb = StringBuilder("jr")
+          sb.append(" ")
+          sb.append(fromInteger(reg.toInt()))
+          return sb.toString()
+        }
       }
       return null
     }