Add memory types to ranges; Collapse code ranges

- Add memory types to Ranges, just like how Labels have them.
- If a range is of type "code", treat it as a single-byte range and do
  not output an address range to the MLB.

Makefile

@@ -4,5 +4,5 @@ all: bin/dasm2lbl
 bin/:
 	mkdir bin
 
-bin/dasm2lbl: **/*.go
+bin/dasm2lbl: config.go lex.go parse.go cmd/main.go
 	go build -o $@ cmd/main.go

config.go

@@ -54,12 +54,6 @@ func (l Label) Mlb(startRam, startRom int) string {
 		addrStr = fmt.Sprintf("%04X-%04X", l.Address, l.Address+l.Size-1)
 	}
 	return fmt.Sprintf("%s:%s:%s:%s", memType, addrStr, l.Name, l.Comment)
-
-	//addr := fmt.Sprintf("%04X", l.Address)
-	//if l.Size > 1 {
-	//	addr = fmt.Sprintf("%04X-%04X", l.Address, l.Address+l.Size-1)
-	//}
-	//return fmt.Sprintf("NesMemory:%s:%s:%s", addr, l.Name, l.Comment)
 }
 
 type Range struct {
@@ -73,11 +67,25 @@ type Range struct {
 }
 
 func (r Range) Mlb(startRam, startRom int) string {
-	addr := fmt.Sprintf("%04X", r.Start)
-	if r.End - r.Start > 1 {
-		addr = fmt.Sprintf("%04X-%04X", r.Start, r.End)
+	start := r.Start
+	end := r.End
+
+	memType := "NesMemory"
+	if start >= startRom {
+		start -= startRom
+		end -= startRom
+		memType = "NesPrgRom"
+	} else if start >= startRam {
+		start -= startRam
+		end -= startRam
+		memType = "NesWorkRam"
 	}
-	return fmt.Sprintf("NesMemory:%s:%s:%s", addr, r.Name, r.Comment)
+
+	addr := fmt.Sprintf("%04X", start)
+	if r.End - r.Start > 1 && r.Type != "code" {
+		addr = fmt.Sprintf("%04X-%04X", start, end)
+	}
+	return fmt.Sprintf("%s:%s:%s:%s", memType, addr, r.Name, r.Comment)
 }
 
 type Segment struct {

parse.go

@@ -102,8 +102,11 @@ func (p *Parser) parseRange() error {
 			}
 
 		case "type", "addrmode":
-			p.next()
-			// just consume it
+			itm = p.next()
+			if itm.typ != lex_Ident {
+				return fmt.Errorf("%s requires ident: %s", itm.val, itm)
+			}
+			rng.Type = itm.val
 
 		case "start", "end", "unit":
 			typ := itm.val