Add ability to step through CPU execution of boot rom

3 files changed, 53 insertions, 1 deletions

diff --git a/src/main/kotlin/gui/CpuRegisterWindow.kt b/src/main/kotlin/gui/CpuRegisterWindow.kt
index 0de7ad6..618d298 100644
--- a/src/main/kotlin/gui/CpuRegisterWindow.kt
+++ b/src/main/kotlin/gui/CpuRegisterWindow.kt
@@ -7,7 +7,7 @@ import imgui.ImGui
 
 fun paintCpuRegisterWindow(registers: Registers) {
   with(ImGui) {
-    setNextWindowSize(Vec2(200, 300), Cond.FirstUseEver)
+    setNextWindowSize(Vec2(200, 250), Cond.FirstUseEver)
     setNextWindowPos(Vec2(20, 150), Cond.FirstUseEver)
     begin("CPU state")
 
diff --git a/src/main/kotlin/gui/RunControlWindow.kt b/src/main/kotlin/gui/RunControlWindow.kt
new file mode 100644
index 0000000..8ffc764
--- /dev/null
+++ b/src/main/kotlin/gui/RunControlWindow.kt
@@ -0,0 +1,46 @@
+package gui
+
+import cpu.Cpu
+import glm_.vec2.Vec2
+import imgui.Cond
+import imgui.ImGui
+
+fun paintRunControlWindow(cpu: Cpu) {
+  with(ImGui) {
+
+    setNextWindowPos(Vec2(20, 410), Cond.FirstUseEver)
+    begin("Run control")
+
+    text("Current op:")
+    separator()
+    if(cpu.currentOp != null) {
+      text(cpu.currentOp!!.name)
+    }
+    else {
+      text("None")
+    }
+
+    newLine()
+
+    text("Next op:")
+    separator()
+    if(cpu.nextOp != null) {
+      text(cpu.nextOp!!.name)
+    }
+    else {
+      text("None")
+    }
+
+    newLine()
+
+    text("Control:")
+    separator()
+
+
+    if(button("Step")) {
+      cpu.executeNextInstruction()
+    }
+
+    end()
+  }
+}
\ No newline at end of file
diff --git a/src/main/kotlin/gui/WindowContainer.kt b/src/main/kotlin/gui/WindowContainer.kt
index 5e101b7..4d58c18 100644
--- a/src/main/kotlin/gui/WindowContainer.kt
+++ b/src/main/kotlin/gui/WindowContainer.kt
@@ -10,6 +10,7 @@ import imgui.impl.LwjglGL3
 import org.lwjgl.opengl.GL11
 import uno.glfw.GlfwWindow
 import uno.glfw.glfw
+import java.io.File
 
 class WindowContainer {
 
@@ -18,6 +19,10 @@ class WindowContainer {
   init {
     glfw.init("3.2")
     cpu = Cpu()
+    val file = File("src/main/resources/roms/boot-rom.gb")
+    val rom = file.readBytes()
+    cpu.loadRom(rom)
+    //cpu.run()
   }
 
   val window = GlfwWindow(1280, 720, "KGB - KotlinGameBoy").apply {
@@ -52,6 +57,7 @@ class WindowContainer {
       paintDebugWindow()
       paintEmulationOutputWindow()
       paintCpuRegisterWindow(cpu.registers)
+      paintRunControlWindow(cpu)
     }
 
     gln.glViewport(window.framebufferSize)