Enable vidHD only on 128kb models

README.md

@@ -21,7 +21,7 @@ Portable emulator of an Apple II+ or //e. Written in Go.
     - ThunderClock Plus real time clock
     - Bootable hard disk card
     - Apple //e 80 columns with 64Kb extra RAM
-    - VidHd, limited to the ROM signature and SHR as used by Total Replay
+    - VidHd, limited to the ROM signature and SHR as used by Total Replay, only for //e models with 128Kb
     - FASTChip, limited to what Total Replay needs to set and clear fast mode
 - Graphic modes:
     - Text 40 columns
@@ -170,7 +170,7 @@ Only valid on SDL mode
   -traceSS
         dump to the console the sofswitches calls
   -vidHDSlot int
-    	  slot for the VidHD card, -1 for none (default 2)
+    	  slot for the VidHD card, only for //e models. -1 for none (default 2)
 
 
 ```

apple2main.go

@@ -52,7 +52,7 @@ func MainApple() *Apple2 {
 	vidHDCardSlot := flag.Int(
 		"vidHDSlot",
 		2,
-		"slot for the VidHD card, -1 for none")
+		"slot for the VidHD card, only for //e models. -1 for none")
 	fastChipCardSlot := flag.Int(
 		"fastChipSlot",
 		3,
@@ -112,6 +112,7 @@ func MainApple() *Apple2 {
 			*charRomFile = "<internal>/Apple2rev7CharGen.rom"
 		}
 		charGenMap = charGenColumnsMap2Plus
+		*vidHDCardSlot = -1
 
 	case "2e":
 		a = newApple2e()
@@ -149,6 +150,7 @@ func MainApple() *Apple2 {
 			initialCharGenPage = 1
 		}
 		charGenMap = charGenColumnsMapBase64a
+		*vidHDCardSlot = -1
 
 	default:
 		panic("Model not supported")