music: dump nibble

src/constants.py

@@ -138,6 +138,9 @@ def emucredits():
 # note: not actually proper opcodes
 note_opcode = {"name": "-", "doc": "Plays the given note with the given duration (in hex). '_' is a tie. '*' represents a portamento. Duration must be one of [1, 2, 3, 4, 6, 8, 10, 20], and the note must be _, *, or in the range 0-C inclusive"}
 
+# dn: dump nibble
+dn_opcode = {"name": "dn", "doc": "Dump nibble"}
+
 music_opcodes = [
     # note: opcodes 0-7 inclusive are actually interpreted as WAIT codes, but will execute
     # if the wait-postfix code is 0xF.

src/mmdata.py

@@ -1053,7 +1053,9 @@ def get_duration_idx(self, music):
 
     def get_nibbles(self, music, address):
         nibbles = []
-        if self.op == constants.note_opcode["name"]:
+        if self.op == "dn":
+            return [int(self.args[0], 16)]
+        elif self.op == constants.note_opcode["name"]:
             nibbles.append(self.get_duration_idx(music))
             # duration
             type = self.args[0]
@@ -1105,7 +1107,7 @@ def get_nibbles(self, music, address):
                     return nibbles
 
             # opcode not found
-            assert(False)
+            assert False, f"Not found: {self.op}"
             return []
 
 class Music:
@@ -2630,7 +2632,7 @@ def stat(self, fname=None, oall=False):
             out("# ")
             out("# The following opcode are recognized:")
             out("# ")
-            for opcode in [constants.note_opcode] + constants.music_opcodes:
+            for opcode in [constants.note_opcode] + constants.music_opcodes + [constants.dn_opcode]:
                 out("#   " + opcode["name"])
                 out("#     " + opcode["doc"])
                 out("#")