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simpler cpu loop for the vms that don't require a particular speed

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This commit is contained in:
Irmen de Jong 2019-10-13 08:16:28 +02:00
parent 8cac4fbd1f
commit 009b0c5c15
4 changed files with 26 additions and 34 deletions
src/main/kotlin/razorvine
examplemachines
ehBasicMain.ktmachineMain.kt
ksim65
Version.kt
components
Display.kt

26
src/main/kotlin/razorvine/examplemachines/ehBasicMain.kt

@ -9,7 +9,6 @@ import razorvine.ksim65.components.Ram
import razorvine.ksim65.components.Rom
import javax.swing.ImageIcon
import javax.swing.JOptionPane
import kotlin.concurrent.scheduleAtFixedRate
/**
* A virtual computer constructed from the various virtual components,
@ -22,9 +21,7 @@ class EhBasicMachine(title: String) {
val rom = Rom(0xc000, 0xffff).also { it.load(javaClass.getResourceAsStream("/ehbasic_C000.bin").readBytes()) }
private val hostDisplay = MainWindow(title)
private val display =
Display(0xd000, 0xd00a, hostDisplay, ScreenDefs.SCREEN_WIDTH_CHARS, ScreenDefs.SCREEN_HEIGHT_CHARS, ScreenDefs.SCREEN_WIDTH,
ScreenDefs.SCREEN_HEIGHT)
private val display = Display(0xd000, 0xd00a, hostDisplay, ScreenDefs.SCREEN_WIDTH_CHARS, ScreenDefs.SCREEN_HEIGHT_CHARS)
private val keyboard = Keyboard(0xd400, 0xd400, hostDisplay)
private var paused = false
@ -49,23 +46,22 @@ class EhBasicMachine(title: String) {
}
fun start() {
val frameRate = 60L
val desiredCyclesPerFrame = 500_000L/frameRate // 500 khz
val timer = java.util.Timer("cpu-cycle", true)
timer.scheduleAtFixedRate(500, 1000/frameRate) {
if (!paused) {
// a simple loop to run the cpu, not targeting a specific desired clock frequency
// (but with a small sleep to not run flat out)
while(true) {
if(paused) {
Thread.sleep(200)
} else {
try {
val prevCycles = cpu.totalCycles
while (cpu.totalCycles-prevCycles < desiredCyclesPerFrame) {
step()
}
repeat(400) { step() }
} catch (rx: RuntimeException) {
JOptionPane.showMessageDialog(hostDisplay, "Run time error: $rx", "Error during execution", JOptionPane.ERROR_MESSAGE)
this.cancel()
break
} catch (ex: Error) {
JOptionPane.showMessageDialog(hostDisplay, "Run time error: $ex", "Error during execution", JOptionPane.ERROR_MESSAGE)
this.cancel()
break
}
Thread.sleep(1)
}
}
}

26
src/main/kotlin/razorvine/examplemachines/machineMain.kt

@ -5,7 +5,6 @@ import razorvine.ksim65.components.*
import java.io.File
import javax.swing.ImageIcon
import javax.swing.JOptionPane
import kotlin.concurrent.scheduleAtFixedRate
/**
@ -21,9 +20,7 @@ class VirtualMachine(title: String) : IVirtualMachine {
private val monitor = Monitor(bus, cpu)
private val debugWindow = DebugWindow(this)
private val hostDisplay = MainWindow(title)
private val display =
Display(0xd000, 0xd00a, hostDisplay, ScreenDefs.SCREEN_WIDTH_CHARS, ScreenDefs.SCREEN_HEIGHT_CHARS, ScreenDefs.SCREEN_WIDTH,
ScreenDefs.SCREEN_HEIGHT)
private val display = Display(0xd000, 0xd00a, hostDisplay, ScreenDefs.SCREEN_WIDTH_CHARS, ScreenDefs.SCREEN_HEIGHT_CHARS)
private val mouse = Mouse(0xd300, 0xd305, hostDisplay)
private val keyboard = Keyboard(0xd400, 0xd400, hostDisplay)
private var paused = false
@ -75,23 +72,22 @@ class VirtualMachine(title: String) : IVirtualMachine {
debugWindow.updateCpu(cpu, bus)
}.start()
val frameRate = 60L
val desiredCyclesPerFrame = 500_000L/frameRate // 500 khz
val timer = java.util.Timer("cpu-cycle", true)
timer.scheduleAtFixedRate(500, 1000/frameRate) {
if (!paused) {
// a simple loop to run the cpu, not targeting a specific desired clock frequency
// (but with a small sleep to not run flat out)
while(true) {
if(paused) {
Thread.sleep(200)
} else {
try {
val prevCycles = cpu.totalCycles
while (cpu.totalCycles-prevCycles < desiredCyclesPerFrame) {
step()
}
repeat(400) { step() }
} catch (rx: RuntimeException) {
JOptionPane.showMessageDialog(hostDisplay, "Run time error: $rx", "Error during execution", JOptionPane.ERROR_MESSAGE)
this.cancel()
break
} catch (ex: Error) {
JOptionPane.showMessageDialog(hostDisplay, "Run time error: $ex", "Error during execution", JOptionPane.ERROR_MESSAGE)
this.cancel()
break
}
Thread.sleep(1)
}
}
}

3
src/main/kotlin/razorvine/ksim65/Version.kt

@ -10,6 +10,7 @@ object Version {
}
val copyright: String by lazy {
"KSim65 6502 cpu simulator v$version by Irmen de Jong (irmen@razorvine.net)"+"\nThis software is free and licensed under the MIT open-source license\n"
"KSim65 6502 cpu simulator v$version by Irmen de Jong (irmen@razorvine.net)" +
"\nThis software is free and licensed under the MIT open-source license\n"
}
}

5
src/main/kotlin/razorvine/ksim65/components/Display.kt

@ -28,11 +28,10 @@ import kotlin.math.min
* 0a r/w character at cursor pos, updates cursor position, scrolls up if necessary
* control chars: 8=backspace, 9=tab, 10=newline, 12=form feed (clear screen), 13=carriage return
*/
class Display(startAddress: Address, endAddress: Address, private val host: IHostInterface, private val charWidth: Int,
private val charHeight: Int, private val pixelWidth: Int, private val pixelHeight: Int) :
class Display(startAddress: Address, endAddress: Address, private val host: IHostInterface,
private val charWidth: Int, private val charHeight: Int) :
MemMappedComponent(startAddress, endAddress) {
init {
require(endAddress-startAddress+1 == 11) { "display needs exactly 11 memory bytes" }
}