mirror of https://github.com/irmen/ksim65.git
105 lines
3.3 KiB
Kotlin
105 lines
3.3 KiB
Kotlin
package razorvine.examplemachines
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import razorvine.ksim65.*
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import razorvine.ksim65.components.*
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import java.io.File
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import javax.swing.ImageIcon
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import javax.swing.JOptionPane
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/**
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* A virtual computer constructed from the various virtual components
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*/
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class VirtualMachine(title: String) : IVirtualMachine {
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override val bus = Bus()
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override val cpu = Cpu6502()
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val ram = Ram(0x0000, 0xffff)
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private val rtc = RealTimeClock(0xd100, 0xd108)
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private val timer = Timer(0xd200, 0xd203, cpu)
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private val monitor = Monitor(bus, cpu)
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private val debugWindow = DebugWindow(this)
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private val hostDisplay = MainWindow(title)
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private val display = Display(0xd000, 0xd00a, hostDisplay, ScreenDefs.SCREEN_WIDTH_CHARS, ScreenDefs.SCREEN_HEIGHT_CHARS)
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private val mouse = Mouse(0xd300, 0xd305, hostDisplay)
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private val keyboard = Keyboard(0xd400, 0xd400, hostDisplay)
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private var paused = false
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init {
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ram[Cpu6502.RESET_vector] = 0x00
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ram[Cpu6502.RESET_vector+1] = 0x10
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ram.loadPrg(javaClass.getResourceAsStream("/vmdemo.prg"), null)
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bus += rtc
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bus += timer
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bus += display
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bus += mouse
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bus += keyboard
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bus += ram
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bus += cpu
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bus.reset()
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hostDisplay.iconImage = ImageIcon(javaClass.getResource("/icon.png")).image
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debugWindow.iconImage = hostDisplay.iconImage
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debugWindow.setLocation(hostDisplay.location.x+hostDisplay.width, hostDisplay.location.y)
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debugWindow.isVisible = true
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hostDisplay.isVisible = true
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hostDisplay.start(30)
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}
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override fun getZeroAndStackPages(): Array<UByte> = ram.getBlock(0, 512)
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override fun loadFileInRam(file: File, loadAddress: Address?) {
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if (file.extension == "prg" && loadAddress == null) ram.loadPrg(file.inputStream(), null)
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else ram.load(file.readBytes(), loadAddress!!)
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}
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override fun pause(paused: Boolean) {
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this.paused = paused
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}
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override fun step() {
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// step a full single instruction
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while (cpu.instrCycles > 0) bus.clock()
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bus.clock()
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while (cpu.instrCycles > 0) bus.clock()
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}
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override fun reset() {
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bus.reset()
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hostDisplay.reset()
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}
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override fun executeMonitorCommand(command: String) = monitor.command(command)
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fun start() {
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javax.swing.Timer(50) {
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debugWindow.updateCpu(cpu, bus)
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}.start()
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// a simple loop to run the cpu, not targeting a specific desired clock frequency
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// (but with a small sleep to not run flat out)
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while(true) {
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if(paused) {
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Thread.sleep(200)
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} else {
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try {
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repeat(500) { step() }
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} catch (rx: RuntimeException) {
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JOptionPane.showMessageDialog(hostDisplay, "Run time error: $rx", "Error during execution", JOptionPane.ERROR_MESSAGE)
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break
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} catch (ex: Error) {
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JOptionPane.showMessageDialog(hostDisplay, "Run time error: $ex", "Error during execution", JOptionPane.ERROR_MESSAGE)
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break
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}
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Thread.sleep(10)
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}
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}
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}
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}
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fun main() {
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val machine = VirtualMachine("KSim65 demo virtual machine - using ksim65 v${Version.version}")
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machine.start()
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}
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