o debugger

- implemented DISASSEMBLE command

debugger/commands.go

@@ -37,6 +37,7 @@ const (
 	KeywordPlayfield     = "PLAYFIELD"
 	KeywordDisplay       = "DISPLAY"
 	KeywordScript        = "SCRIPT"
+	KeywordDisassemble   = "DISASSEMBLE"
 
 	SubKeywordBreaks = "BREAKS"
 	SubKeywordTraps  = "TRAPS"
@@ -79,6 +80,7 @@ var DebuggerCommands = parser.Commands{
 	KeywordPlayfield:     parser.CommandArgs{},
 	KeywordDisplay:       parser.CommandArgs{},
 	KeywordScript:        parser.CommandArgs{parser.Arg{Typ: parser.ArgFile, Req: true}},
+	KeywordDisassemble:   parser.CommandArgs{},
 }
 
 func init() {
@@ -121,4 +123,6 @@ var Help = map[string]string{
 	KeywordBall:          "Display the current state of the Ball sprite",
 	KeywordPlayfield:     "Display the current playfield data",
 	KeywordDisplay:       "Display the TV image",
-	KeywordScript:        "Run commands from specified file"}
+	KeywordScript:        "Run commands from specified file",
+	KeywordDisassemble:   "Print the full cartridge disassembly",
+}

debugger/debugger.go

@@ -416,6 +416,9 @@ func (dbg *Debugger) parseCommand(input string) (bool, error) {
 			return false, err
 		}
 
+	case KeywordDisassemble:
+		dbg.print(ui.CPUStep, dbg.disasm.Dump())
+
 	case KeywordSymbol:
 		address, err := dbg.disasm.Symtable.SearchLocation(parts[1])
 		if err != nil {

disassembly/disassembly.go

@@ -109,6 +109,8 @@ func NewDisassembly(cartridgeFilename string) (*Disassembly, error) {
 
 // Dump returns the entire disassembly as a string
 func (dsm *Disassembly) Dump() (s string) {
+	// TODO: buffered output - it can take too long to build the string if the
+	// disassembly is too long
 	for _, pc := range dsm.SequencePoints {
 		s = fmt.Sprintf("%s\n%s", s, dsm.Program[pc].GetString(dsm.Symtable, result.StyleFull))
 	}