From c26b44c6867f343b01e0028dfe53851ed09e709a Mon Sep 17 00:00:00 2001
From: Will Angenent <will.angenent@ntt.eu>
Date: Sat, 19 May 2018 10:55:41 +0100
Subject: [PATCH] Added optional click when drive head moves

Very primitive but kind of entertaining.
---
 appleiie.go     |  2 ++
 audio/ebiten.go | 10 ++++++----
 mmu/io.go       |  3 +++
 utils/utils.go  |  1 +
 4 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/appleiie.go b/appleiie.go
index cff9076..be0c76f 100644
--- a/appleiie.go
+++ b/appleiie.go
@@ -68,6 +68,7 @@ func main() {
 	breakAddressString := flag.String("break", "", "Break on address")
 	mute := flag.Bool("mute", false, "Mute sound")
 	diskImage := flag.String("image", "", "Disk Image")
+	clickWhenDriveHeadMoves := flag.Bool("drive-head-click", false, "Click speaker when drive head moves")
 	flag.Parse()
 
 	breakAddress = utils.DecodeCmdLineAddress(breakAddressString)
@@ -88,6 +89,7 @@ func main() {
 	video.Init()
 	audio.InitEbiten()
 	audio.Mute = *mute
+	audio.ClickWhenDriveHeadMoves = *clickWhenDriveHeadMoves
 	system.Init()
 	cpu.Reset()
 
diff --git a/audio/ebiten.go b/audio/ebiten.go
index 9d4ea22..5c116e8 100644
--- a/audio/ebiten.go
+++ b/audio/ebiten.go
@@ -8,10 +8,11 @@ import (
 )
 
 var (
-	audioContext *ebiten_audio.Context
-	player       *ebiten_audio.Player
-	firstAudio   bool
-	Mute         bool
+	audioContext            *ebiten_audio.Context
+	player                  *ebiten_audio.Player
+	firstAudio              bool
+	Mute                    bool
+	ClickWhenDriveHeadMoves bool
 )
 
 type stream struct{}
@@ -62,6 +63,7 @@ func (s *stream) Close() error {
 func InitEbiten() {
 	firstAudio = true
 	Mute = false
+	ClickWhenDriveHeadMoves = false
 
 	var err error
 	audioContext, err = ebiten_audio.NewContext(system.AudioSampleRate)
diff --git a/mmu/io.go b/mmu/io.go
index 45b278f..1f3530c 100644
--- a/mmu/io.go
+++ b/mmu/io.go
@@ -185,6 +185,9 @@ func readWrite(address uint16, isRead bool) bool {
 
 			DriveState.Phase = uint8(phase)
 			MakeTrackData(DriveState.ArmPosition)
+			if audio.ClickWhenDriveHeadMoves {
+				audio.Click()
+			}
 		}
 
 		return true
diff --git a/utils/utils.go b/utils/utils.go
index 1f0988c..e8e7d70 100644
--- a/utils/utils.go
+++ b/utils/utils.go
@@ -52,6 +52,7 @@ func DecodeCmdLineAddress(s *string) (result *uint16) {
 func RunUntilBreakPoint(t *testing.T, breakAddress uint16, seconds int, showInstructions bool, message string) {
 	fmt.Printf("Running until %#04x: %s \n", breakAddress, message)
 	system.FrameCycles = 0
+	system.LastAudioCycles = 0
 	exitAtBreak := false
 	disableFirmwareWait := false
 	cpu.Run(showInstructions, &breakAddress, exitAtBreak, disableFirmwareWait, uint64(system.CpuFrequency*seconds))