diff --git a/apple2Setup.go b/apple2Setup.go
index b9de368..dddcf5a 100644
--- a/apple2Setup.go
+++ b/apple2Setup.go
@@ -95,7 +95,7 @@ func (a *Apple2) LoadRom(filename string) error {
 }
 
 // AddDisk2 inserts a DiskII controller
-func (a *Apple2) AddDisk2(slot int, diskRomFile string, diskImage string) error {
+func (a *Apple2) AddDisk2(slot int, diskRomFile string, diskImage, diskBImage string) error {
 	var c cardDisk2
 	data, err := loadResource(diskRomFile)
 	if err != nil {
@@ -112,6 +112,14 @@ func (a *Apple2) AddDisk2(slot int, diskRomFile string, diskImage string) error
 		c.drive[0].insertDiskette(diskette)
 	}
 
+	if diskBImage != "" {
+		diskette, err := loadDisquette(diskBImage)
+		if err != nil {
+			return err
+		}
+		c.drive[1].insertDiskette(diskette)
+	}
+
 	return nil
 }
 
diff --git a/apple2main.go b/apple2main.go
index 4cf0365..41d734a 100644
--- a/apple2main.go
+++ b/apple2main.go
@@ -25,6 +25,10 @@ func MainApple() *Apple2 {
 		"disk",
 		"<internal>/dos33.dsk",
 		"file to load on the first disk drive")
+	diskBImage := flag.String(
+		"diskb",
+		"",
+		"file to load on the second disk drive")
 	wozImage := flag.String(
 		"woz",
 		"",
@@ -224,7 +228,7 @@ func MainApple() *Apple2 {
 		a.AddFastChip(*fastChipCardSlot)
 	}
 	if *disk2Slot > 0 {
-		err := a.AddDisk2(*disk2Slot, *disk2RomFile, *diskImage)
+		err := a.AddDisk2(*disk2Slot, *disk2RomFile, *diskImage, *diskBImage)
 		if err != nil {
 			panic(err)
 		}