- Startup speed is set by ColdReset, so it will work always

- HiRes screen is being cleared when switched back to text mode
- Turned off Debug app for Release mode

A2Mac.xcodeproj/xcshareddata/xcschemes/A2Mac.xcscheme

@@ -61,8 +61,8 @@
    </TestAction>
    <LaunchAction
       buildConfiguration = "Release"
-      selectedDebuggerIdentifier = "Xcode.DebuggerFoundation.Debugger.LLDB"
-      selectedLauncherIdentifier = "Xcode.DebuggerFoundation.Launcher.LLDB"
+      selectedDebuggerIdentifier = ""
+      selectedLauncherIdentifier = "Xcode.IDEFoundation.Launcher.PosixSpawn"
       launchStyle = "0"
       useCustomWorkingDirectory = "NO"
       ignoresPersistentStateOnLaunch = "NO"

A2Mac/HiRes.swift

@@ -129,12 +129,18 @@ class HiRes: NSView {
             }
         }
     }
+    
+    
+    func clearScreen() {
+        HiRes.context?.clear( CGRect(x: 0, y: 0, width: frame.width, height: frame.height) )
+        needsDisplay = true
+    }
 
 
     required init?(coder aDecoder: NSCoder) {
         super.init(coder: aDecoder)
         initHiResLineAddresses()
-        HiRes.context?.clear( CGRect(x: 0, y: 0, width: frame.width, height: frame.height) )
+        clearScreen()
 
 //        currentContext?.setShouldAntialias(false)
 //        currentContext?.interpolationQuality = CGInterpolationQuality.none

A2Mac/ViewController.swift

@@ -288,6 +288,10 @@ class ViewController: NSViewController  {
         
     }
     
+    
+    var savedVideoMode = videoMode_t.init()
+    
+    
     override func keyUp(with event: NSEvent) {
         print("KBD Event")
 //        switch event.modifierFlags.intersection(.deviceIndependentFlagsMask) {
@@ -564,6 +568,12 @@ class ViewController: NSViewController  {
 //            self.hires.setNeedsDisplay( CGRect(x: 400, y: 600, width: 50, height: 50) )
 //            self.hires.setNeedsDisplay( CGRect(x: 500, y: 600, width: 50, height: 50) )
 
+            if self.savedVideoMode.text != videoMode.text {
+                self.savedVideoMode.text = videoMode.text
+                
+                self.hires.clearScreen()
+            }
+            
             // only refresh graphics view when needed (aka not in text mode)
             if ( videoMode.text == 0 ) {
 //                self.hires.needsDisplay = true

src/cpu/6502.c

@@ -841,7 +841,9 @@ void m6502_ColdReset( const char * bundlePath, const char * romFileName ) {
     mhz = (double)MHz_6502 / M;
     
     unsigned long long saved_frm_set = clk_6502_per_frm_set;
-    clk_6502_per_frm_max = clk_6502_per_frm_set = 0;
+    clk_6502_per_frm     =
+    clk_6502_per_frm_max =
+    clk_6502_per_frm_set = 0;
     
     // wait 100ms to be sure simulation has been halted
     usleep(100000);
@@ -1005,8 +1007,9 @@ void m6502_ColdReset( const char * bundlePath, const char * romFileName ) {
 //    memcpy( RAM + 0x1000, counter_fast, sizeof(counter));
 //    m6502.PC = 0x1000;
     
-    clk_6502_per_frm_set = saved_frm_set;
-
+    clk_6502_per_frm_set    = saved_frm_set;
+    clk_6502_per_frm        = startup_MHz_6502 / fps;
+    diskAccelerator_count   = 15;
 }