Implemented calls using memory addresses

src/asm/Memory.go

@@ -35,9 +35,27 @@ func (mem *Memory) Format(custom string) string {
 		tmp.WriteString(strconv.Itoa(int(mem.Offset)))
 	}
 
-	tmp.WriteString("], ")
-	tmp.WriteString(custom)
+	tmp.WriteString("]")
+
+	if custom != "" {
+		tmp.WriteString(", ")
+		tmp.WriteString(custom)
+	}
+
 	tmp.WriteString(", ")
 	tmp.WriteString(strconv.Itoa(int(mem.Length)))
 	return tmp.String()
 }
+
+// String returns a human readable version.
+func (mem *Memory) String() string {
+	return mem.Format("")
+}
+
+// Memory adds an instruction with a memory address.
+func (a *Assembler) Memory(mnemonic Mnemonic, address Memory) {
+	a.Instructions = append(a.Instructions, Instruction{
+		Mnemonic: mnemonic,
+		Data:     &address,
+	})
+}