mirror of https://github.com/irmen/ksim65.git
93 lines
3.0 KiB
Kotlin
93 lines
3.0 KiB
Kotlin
package razorvine.c64emu
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import razorvine.examplemachine.DebugWindow
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import kotlin.concurrent.scheduleAtFixedRate
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import razorvine.ksim65.Bus
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import razorvine.ksim65.Cpu6502
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import razorvine.ksim65.IVirtualMachine
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import razorvine.ksim65.Version
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import razorvine.ksim65.components.*
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import java.io.File
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import java.nio.file.Paths
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import javax.swing.ImageIcon
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/**
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* The virtual representation of the Commodore-64
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*/
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class C64Machine(title: String) : IVirtualMachine {
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private val romsPath = Paths.get(expandUser("~/.vice/C64"))
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val chargenData = romsPath.resolve("chargen").toFile().readBytes()
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val basicData = romsPath.resolve("basic").toFile().readBytes()
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val kernalData = romsPath.resolve("kernal").toFile().readBytes()
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override val bus = Bus()
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override val cpu = Cpu6502(false)
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val ram = Ram(0x0000, 0xffff)
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val vic = VicII(0xd000, 0xd3ff)
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val basicRom = Rom(0xa000, 0xbfff).also { it.load(basicData) }
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val kernalRom = Rom(0xe000, 0xffff).also { it.load(kernalData) }
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private val debugWindow = DebugWindow(this)
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private val hostDisplay = MainWindow(title, chargenData, ram)
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init {
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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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bus += basicRom
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bus += kernalRom
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bus += vic
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bus += ram
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bus += cpu
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bus.reset()
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debugWindow.isVisible = true
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hostDisplay.isVisible = true
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hostDisplay.start()
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}
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private fun expandUser(path: String): String {
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if(path.startsWith("~" + File.separator)) {
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return System.getProperty("user.home") + path.substring(1);
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} else {
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throw UnsupportedOperationException("home dir expansion not implemented for other users")
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}
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}
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override var paused = false
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override fun stepInstruction() {
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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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fun start() {
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val timer = java.util.Timer("clock", true)
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val startTime = System.currentTimeMillis()
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timer.scheduleAtFixedRate(1, 1) {
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if(!paused) {
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repeat(400) {
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stepInstruction()
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if(vic.currentRasterLine == 255) {
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// we force an irq here ourselves rather than fully emulating the VIC-II's raster IRQ
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// or the CIA timer IRQ/NMI.
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cpu.irq()
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}
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}
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debugWindow.updateCpu(cpu, bus)
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val duration = System.currentTimeMillis() - startTime
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val speedKhz = cpu.totalCycles.toDouble() / duration
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debugWindow.speedKhzTf.text = "%.1f".format(speedKhz)
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}
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}
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}
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}
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fun main(args: Array<String>) {
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val machine = C64Machine("virtual Commodore-64 - using KSim65 v${Version.version}")
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machine.start()
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}
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