diff --git a/build.gradle.kts b/build.gradle.kts
index dfeadde..406dd28 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -10,6 +10,7 @@ plugins {
     id("org.jetbrains.dokka") version "0.9.18"
     id("com.jfrog.bintray") version "1.7.3"
     id("maven-publish")
+    id("application")
 }
 
 val versionProps = Properties().also {
@@ -39,6 +40,11 @@ dependencies {
     testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine:5.1.0")
 }
 
+application {
+    applicationName = "ksim65vm"
+    mainClassName = "razorvine.examplemachine.SystemMainKt"
+}
+
 tasks.named<Test>("test") {
     // Enable JUnit 5 (Gradle 4.6+).
     useJUnitPlatform()
diff --git a/src/main/kotlin/razorvine/examplemachine/GUI.kt b/src/main/kotlin/razorvine/examplemachine/GUI.kt
index cbb7eb8..9cc5da3 100644
--- a/src/main/kotlin/razorvine/examplemachine/GUI.kt
+++ b/src/main/kotlin/razorvine/examplemachine/GUI.kt
@@ -28,7 +28,7 @@ object ScreenDefs {
     val Characters = loadCharacters()
 
     private fun loadCharacters(): Array<BufferedImage> {
-        val img = ImageIO.read(javaClass.getResource("/charset/unscii8x16.png"))
+        val img = ImageIO.read(javaClass.getResourceAsStream("/charset/unscii8x16.png"))
         val charactersImage = BufferedImage(img.width, img.height, BufferedImage.TYPE_INT_ARGB)
         charactersImage.createGraphics().drawImage(img, 0, 0, null)
 
@@ -62,6 +62,7 @@ private class BitmapScreenPanel : JPanel() {
     private val g2d = image.graphics as Graphics2D
     private var cursorX: Int = 0
     private var cursorY: Int = 0
+    private var cursorState: Boolean = false
 
     init {
         val size = Dimension(
@@ -85,6 +86,16 @@ private class BitmapScreenPanel : JPanel() {
             image, 0, 0, (image.width * ScreenDefs.DISPLAY_PIXEL_SCALING).toInt(),
             (image.height * ScreenDefs.DISPLAY_PIXEL_SCALING).toInt(), null
         )
+        if(cursorState) {
+            val scx = (cursorX * ScreenDefs.DISPLAY_PIXEL_SCALING * 8).toInt()
+            val scy = (cursorY * ScreenDefs.DISPLAY_PIXEL_SCALING * 16).toInt()
+            val scw = (8 * ScreenDefs.DISPLAY_PIXEL_SCALING).toInt()
+            val sch = (16 * ScreenDefs.DISPLAY_PIXEL_SCALING).toInt()
+            g2d.setXORMode(Color.CYAN)
+            g2d.fillRect(scx, scy, scw, sch)
+            g2d.setPaintMode()
+        }
+
     }
 
     fun clearScreen() {
@@ -122,6 +133,12 @@ private class BitmapScreenPanel : JPanel() {
             (pos.y / ScreenDefs.DISPLAY_PIXEL_SCALING).toInt()
         )
     }
+
+    fun blinkCursor(x: Int, y: Int) {
+        cursorX = x
+        cursorY = y
+        cursorState = !cursorState
+    }
 }
 
 class DebugWindow(val vm: VirtualMachine) : JFrame("debugger"), ActionListener {
@@ -368,4 +385,8 @@ class MainWindow(title: String) : JFrame(title), KeyListener, MouseInputListener
         else
             keyboardBuffer.pop()
     }
+
+    override fun blinkCursor(x: Int, y: Int) {
+        canvas.blinkCursor(x, y)
+    }
 }
diff --git a/src/main/kotlin/razorvine/examplemachine/systemMain.kt b/src/main/kotlin/razorvine/examplemachine/systemMain.kt
index ee77d7f..6daad94 100644
--- a/src/main/kotlin/razorvine/examplemachine/systemMain.kt
+++ b/src/main/kotlin/razorvine/examplemachine/systemMain.kt
@@ -28,7 +28,7 @@ class VirtualMachine(title: String) {
     init {
         ram[Cpu6502.RESET_vector] = 0x00
         ram[Cpu6502.RESET_vector + 1] = 0x10
-        ram.loadPrg(javaClass.getResource("/vmdemo.prg").toURI())
+        ram.loadPrg(javaClass.getResourceAsStream("/vmdemo.prg"))
 
         bus += rtc
         bus += timer
@@ -57,7 +57,7 @@ class VirtualMachine(title: String) {
         val timer = java.util.Timer("clock", true)
         timer.scheduleAtFixedRate(1, 1) {
             if(!paused) {
-                repeat(5) {
+                repeat(10) {
                     stepInstruction()
                 }
                 debugWindow.updateCpu(cpu)
diff --git a/src/main/kotlin/razorvine/ksim65/IHostInterface.kt b/src/main/kotlin/razorvine/ksim65/IHostInterface.kt
index be84d87..707e352 100644
--- a/src/main/kotlin/razorvine/ksim65/IHostInterface.kt
+++ b/src/main/kotlin/razorvine/ksim65/IHostInterface.kt
@@ -13,6 +13,7 @@ interface IHostInterface {
     fun scrollUp()
     fun mouse(): MouseInfo
     fun keyboard(): Char?
+    fun blinkCursor(x: Int, y: Int)
 
     class MouseInfo(val x: Int, val y: Int, val left: Boolean, val right: Boolean, val middle: Boolean)
 }
diff --git a/src/main/kotlin/razorvine/ksim65/components/Display.kt b/src/main/kotlin/razorvine/ksim65/components/Display.kt
index d212c27..d6586bd 100644
--- a/src/main/kotlin/razorvine/ksim65/components/Display.kt
+++ b/src/main/kotlin/razorvine/ksim65/components/Display.kt
@@ -8,6 +8,8 @@ import kotlin.math.min
  * Text mode and graphics (bitmap) mode display.
  * Note that the character matrix and pixel matrix are NOT memory mapped,
  * this display device is controlled by sending char/pixel commands to it.
+ * Also, the blinking cursor is 'hardware controlled' (by the host display),
+ * these device registers merely can set it to a different screen position.
  *
  * Requires a host display to actually view the stuff, obviously.
  *
@@ -25,8 +27,6 @@ import kotlin.math.min
  *  09      cursor Y position (r/w)
  *  0a      read or write character at cursor pos, updates cursor position, scrolls up if necessary
  *          control characters: 0x08=backspace, 0x09=tab, 0x0a=newline, 0x0c=formfeed(clear screen), 0x0d=carriagereturn
- *
- *          TODO: cursor blinking, blink speed (0=off)
  */
 class Display(
     startAddress: Address, endAddress: Address,
@@ -49,10 +49,16 @@ class Display(
     private var pixelX = 0
     private var pixelY = 0
     private val charMatrix = Array<ShortArray>(charHeight) { ShortArray(charWidth) }    // matrix[y][x] to access
+    private var cursorCycles = 0
 
     override fun clock() {
         // if the system clock is synced to the display refresh,
         // you *could* add a Vertical Blank interrupt here.
+        // for now, only the cursor blinking is controlled by this.
+        cursorCycles++
+        if(cursorCycles % 8000 == 0) {
+            host.blinkCursor(cursorX, cursorY)
+        }
     }
 
     override fun reset() {
diff --git a/src/main/kotlin/razorvine/ksim65/components/Ram.kt b/src/main/kotlin/razorvine/ksim65/components/Ram.kt
index 09ac4c8..e1b4fb9 100644
--- a/src/main/kotlin/razorvine/ksim65/components/Ram.kt
+++ b/src/main/kotlin/razorvine/ksim65/components/Ram.kt
@@ -1,9 +1,8 @@
 package razorvine.ksim65.components
 
 import java.io.File
-import java.net.URI
+import java.io.InputStream
 import java.net.URL
-import java.nio.file.Paths
 
 /**
  * A RAM chip with read/write memory.
@@ -33,14 +32,14 @@ class Ram(startAddress: Address, endAddress: Address) : MemoryComponent(startAdd
      * Load a c64-style prg program. This file type has the load address as the first two bytes.
      */
     fun loadPrg(filename: String) {
-        loadPrg(Paths.get(filename).toUri())
+        loadPrg(File(filename).inputStream())
     }
 
     /**
      * Load a c64-style prg program. This file type has the load address as the first two bytes.
      */
-    fun loadPrg(file: URI) {
-        val bytes = File(file).readBytes()
+    fun loadPrg(stream: InputStream) {
+        val bytes = stream.readAllBytes()
         val loadAddress = (bytes[0].toInt() or (bytes[1].toInt() shl 8)) and 65535
         val baseAddress = loadAddress - startAddress
         bytes.drop(2).forEachIndexed { index, byte ->