VidHD card signature. Total Replay thinks it's there

apple2Setup.go

@@ -130,6 +130,13 @@ func (a *Apple2) AddHardDisk(slot int, hdImage string, trace bool) error {
 	return nil
 }
 
+// AddVidHD adds a card with the signature of VidHD
+func (a *Apple2) AddVidHD(slot int) {
+	var c cardVidHD
+	c.loadRom(buildVidHDRom())
+	a.insertCard(&c, slot)
+}
+
 // AddLanguageCard inserts a 16Kb card
 func (a *Apple2) AddLanguageCard(slot int) {
 	a.insertCard(&cardLanguage{}, slot)

apple2main.go

@@ -53,51 +53,46 @@ func MainApple() *Apple2 {
 		"thunderClockCardSlot",
 		4,
 		"slot for the ThunderClock Plus card. -1 for none")
+	vidHDCardSlot := flag.Int(
+		"vidHDSlot",
+		2,
+		"slot for the VidHD card, -1 for none")
 	mono := flag.Bool(
 		"mono",
 		false,
-		"emulate a green phosphor monitor instead of a NTSC color TV. Use F6 to toggle.",
-	)
+		"emulate a green phosphor monitor instead of a NTSC color TV. Use F6 to toggle.")
 	fastDisk := flag.Bool(
 		"fastDisk",
 		true,
-		"set fast mode when the disks are spinning",
-	)
+		"set fast mode when the disks are spinning")
 	panicSS := flag.Bool(
 		"panicSS",
 		false,
-		"panic if a not implemented softswitch is used",
-	)
+		"panic if a not implemented softswitch is used")
 	traceCPU := flag.Bool(
 		"traceCpu",
 		false,
-		"dump to the console the CPU execution operations",
-	)
+		"dump to the console the CPU execution operations")
 	traceSS := flag.Bool(
 		"traceSS",
 		false,
-		"dump to the console the sofswitches calls",
-	)
+		"dump to the console the sofswitches calls")
 	traceHD := flag.Bool(
 		"traceHD",
 		false,
-		"dump to the console the hd commands",
-	)
+		"dump to the console the hd commands")
 	dumpChars := flag.Bool(
 		"dumpChars",
 		false,
-		"shows the character map",
-	)
+		"shows the character map")
 	model := flag.String(
 		"model",
 		"2enh",
-		"set base model. Models available 2plus, 2e, 2enh, base64a",
-	)
+		"set base model. Models available 2plus, 2e, 2enh, base64a")
 	profile := flag.Bool(
 		"profile",
 		false,
-		"generate profile trace to analyse with pprof",
-	)
+		"generate profile trace to analyse with pprof")
 	flag.Parse()
 
 	var a *Apple2
@@ -190,6 +185,9 @@ func MainApple() *Apple2 {
 			panic(err)
 		}
 	}
+	if *vidHDCardSlot > 0 {
+		a.AddVidHD(*vidHDCardSlot)
+	}
 	if *disk2Slot > 0 {
 		err := a.AddDisk2(*disk2Slot, *disk2RomFile, *diskImage)
 		if err != nil {

cardVidHD.go

@@ -0,0 +1,26 @@
+package apple2
+
+/*
+Simulates just what is needed to make Total Replay use the GS modes if the VidHD card is found
+
+See:
+	https://github.com/a2-4am/4cade/blob/master/src/hw.vidhd.a
+*/
+
+type cardVidHD struct {
+	cardBase
+}
+
+func buildVidHDRom() []uint8 {
+	data := make([]uint8, 256)
+
+	data[0] = 0x24
+	data[1] = 0xEA
+	data[2] = 0x4C
+
+	return data
+}
+
+func (c *cardVidHD) assign(a *Apple2, slot int) {
+	c.cardBase.assign(a, slot)
+}