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ksim65
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added joystick to C64 emulation (via numpad keys)

This commit is contained in:
Irmen de Jong 2020-03-01 18:38:00 +01:00
parent 99942748f9
commit 7522d3cb3b
13 changed files with 192 additions and 80 deletions
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c64testprgs/joytest.prg Normal file
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free-c64-roms/basic Normal file
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free-c64-roms/chargen Normal file
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free-c64-roms/kernal Normal file
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free-c64-roms/readme.txt Normal file
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@ -0,0 +1,24 @@
Free/open source roms for the C64
See https://github.com/MEGA65/open-roms
The following copyright notices apply to the entirety of this package,
including each source file, unless otherwise noted in each file or directory.
Copyright Paul Gardner-Stephen, 2019.
Copyright Roman Standzikowski (FeralChil64), 2019-2020.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.

192
src/main/kotlin/razorvine/c64emu/Cia.kt
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@ -9,12 +9,20 @@ import java.awt.event.KeyEvent
/**
* Minimal simulation of the MOS 6526 CIA chip.
* Depending on what CIA it is (1 or 2), some registers do different things on the C64.
* This implementation provides a working keyboard matrix, TOD clock, and the essentials of the timer A and B.
* This implementation provides a working keyboard matrix, joystick in port#2 (cia 1),
* time of day clock, and the essentials of the timer A and B.
*/
class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu: Cpu6502) : MemMappedComponent(startAddress, endAddress) {
private var ramBuffer = Array<UByte>(endAddress-startAddress+1) { 0 }
private var regPRA = 0xff
// joystick in port 2 configuration (only works on cia#1)
private var joy2up = false
private var joy2down = false
private var joy2left = false
private var joy2right = false
private var joy2fire = false
class TimeOfDay {
private var updatedAt = 0L
private var startedAt = 0L
@ -125,6 +133,11 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu:
timerAset = 0
timerBactual = 0
timerBset = 0
joy2up = false
joy2down = false
joy2left = false
joy2right = false
joy2fire = false
}
override operator fun get(offset: Int): UByte {
@ -139,71 +152,85 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu:
}
val register = offset and 15
if (number == 1 && register == 0x01) {
// register 1 on CIA#1 is the keyboard data port
// if bit is cleared in PRA, contains keys pressed in that column of the matrix
return when (regPRA) {
0b00000000 -> {
// check if any keys are pressed at all (by checking all columns at once)
if (hostKeyPresses.isEmpty()) 0xff.toShort() else 0x00.toShort()
}
0b11111110 -> {
// read column 0
scanColumn(HostKeyPress(KeyEvent.VK_DOWN), HostKeyPress(KeyEvent.VK_F5), HostKeyPress(KeyEvent.VK_F3),
HostKeyPress(KeyEvent.VK_F1), HostKeyPress(KeyEvent.VK_F7), HostKeyPress(KeyEvent.VK_RIGHT),
HostKeyPress(KeyEvent.VK_ENTER), HostKeyPress(KeyEvent.VK_BACK_SPACE))
}
0b11111101 -> {
// read column 1
scanColumn(HostKeyPress(KeyEvent.VK_SHIFT), // left shift
HostKeyPress(KeyEvent.VK_E), HostKeyPress(KeyEvent.VK_S), HostKeyPress(KeyEvent.VK_Z),
HostKeyPress(KeyEvent.VK_4), HostKeyPress(KeyEvent.VK_A), HostKeyPress(KeyEvent.VK_W),
HostKeyPress(KeyEvent.VK_3))
}
0b11111011 -> {
// read column 2
scanColumn(HostKeyPress(KeyEvent.VK_X), HostKeyPress(KeyEvent.VK_T), HostKeyPress(KeyEvent.VK_F),
HostKeyPress(KeyEvent.VK_C), HostKeyPress(KeyEvent.VK_6), HostKeyPress(KeyEvent.VK_D),
HostKeyPress(KeyEvent.VK_R), HostKeyPress(KeyEvent.VK_5))
}
0b11110111 -> {
// read column 3
scanColumn(HostKeyPress(KeyEvent.VK_V), HostKeyPress(KeyEvent.VK_U), HostKeyPress(KeyEvent.VK_H),
HostKeyPress(KeyEvent.VK_B), HostKeyPress(KeyEvent.VK_8), HostKeyPress(KeyEvent.VK_G),
HostKeyPress(KeyEvent.VK_Y), HostKeyPress(KeyEvent.VK_7))
}
0b11101111 -> {
// read column 4
scanColumn(HostKeyPress(KeyEvent.VK_N), HostKeyPress(KeyEvent.VK_O), HostKeyPress(KeyEvent.VK_K),
HostKeyPress(KeyEvent.VK_M), HostKeyPress(KeyEvent.VK_0), HostKeyPress(KeyEvent.VK_J),
HostKeyPress(KeyEvent.VK_I), HostKeyPress(KeyEvent.VK_9))
}
0b11011111 -> {
// read column 5
scanColumn(HostKeyPress(KeyEvent.VK_COMMA), HostKeyPress(KeyEvent.VK_AT), HostKeyPress(KeyEvent.VK_COLON),
HostKeyPress(KeyEvent.VK_PERIOD), HostKeyPress(KeyEvent.VK_MINUS), HostKeyPress(KeyEvent.VK_L),
HostKeyPress(KeyEvent.VK_P), HostKeyPress(KeyEvent.VK_PLUS))
}
0b10111111 -> {
// read column 6
scanColumn(HostKeyPress(KeyEvent.VK_SLASH), HostKeyPress(KeyEvent.VK_CIRCUMFLEX), HostKeyPress(KeyEvent.VK_EQUALS),
HostKeyPress(KeyEvent.VK_SHIFT, rightSide = true), // right shift
HostKeyPress(KeyEvent.VK_HOME), HostKeyPress(KeyEvent.VK_SEMICOLON), HostKeyPress(KeyEvent.VK_ASTERISK),
HostKeyPress(KeyEvent.VK_DEAD_TILDE) // pound sign
)
}
0b01111111 -> {
// read column 7
scanColumn(HostKeyPress(KeyEvent.VK_ESCAPE), HostKeyPress(KeyEvent.VK_Q), HostKeyPress(KeyEvent.VK_ALT),
HostKeyPress(KeyEvent.VK_SPACE), HostKeyPress(KeyEvent.VK_2), HostKeyPress(KeyEvent.VK_CONTROL),
HostKeyPress(KeyEvent.VK_BACK_QUOTE), HostKeyPress(KeyEvent.VK_1))
}
else -> {
// invalid column selection
0xff
if(number==1) {
// first CIA has keyboard matrix
if(register==0x00) {
// reading $dc00 is joystick in port #2
return (0b01100000
or (if(joy2up) 0 else 0b00000001)
or (if(joy2down) 0 else 0b00000010)
or (if(joy2left) 0 else 0b00000100)
or (if(joy2right) 0 else 0b00001000)
or (if(joy2fire) 0 else 0b00010000)).toShort()
} else if(register==0x01) {
// register 1 on CIA#1 is the keyboard data port (and joystick #1...)
// if bit is cleared in PRA, contains keys pressed in that column of the matrix
// NOTE: we do not emulate a joystick in port #1 as this conflicts with the keyboard.
// just use the joystick in port #2 for now...
return when (regPRA) {
0b00000000 -> {
// check if any keys are pressed at all (by checking all columns at once)
if (hostKeyPresses.isEmpty()) 0xff.toShort() else 0x00.toShort()
}
0b11111110 -> {
// read column 0
scanColumn(HostKeyPress(KeyEvent.VK_DOWN), HostKeyPress(KeyEvent.VK_F5), HostKeyPress(KeyEvent.VK_F3),
HostKeyPress(KeyEvent.VK_F1), HostKeyPress(KeyEvent.VK_F7), HostKeyPress(KeyEvent.VK_RIGHT),
HostKeyPress(KeyEvent.VK_ENTER), HostKeyPress(KeyEvent.VK_BACK_SPACE))
}
0b11111101 -> {
// read column 1
scanColumn(HostKeyPress(KeyEvent.VK_SHIFT), // left shift
HostKeyPress(KeyEvent.VK_E), HostKeyPress(KeyEvent.VK_S), HostKeyPress(KeyEvent.VK_Z),
HostKeyPress(KeyEvent.VK_4), HostKeyPress(KeyEvent.VK_A), HostKeyPress(KeyEvent.VK_W),
HostKeyPress(KeyEvent.VK_3))
}
0b11111011 -> {
// read column 2
scanColumn(HostKeyPress(KeyEvent.VK_X), HostKeyPress(KeyEvent.VK_T), HostKeyPress(KeyEvent.VK_F),
HostKeyPress(KeyEvent.VK_C), HostKeyPress(KeyEvent.VK_6), HostKeyPress(KeyEvent.VK_D),
HostKeyPress(KeyEvent.VK_R), HostKeyPress(KeyEvent.VK_5))
}
0b11110111 -> {
// read column 3
scanColumn(HostKeyPress(KeyEvent.VK_V), HostKeyPress(KeyEvent.VK_U), HostKeyPress(KeyEvent.VK_H),
HostKeyPress(KeyEvent.VK_B), HostKeyPress(KeyEvent.VK_8), HostKeyPress(KeyEvent.VK_G),
HostKeyPress(KeyEvent.VK_Y), HostKeyPress(KeyEvent.VK_7))
}
0b11101111 -> {
// read column 4
scanColumn(HostKeyPress(KeyEvent.VK_N), HostKeyPress(KeyEvent.VK_O), HostKeyPress(KeyEvent.VK_K),
HostKeyPress(KeyEvent.VK_M), HostKeyPress(KeyEvent.VK_0), HostKeyPress(KeyEvent.VK_J),
HostKeyPress(KeyEvent.VK_I), HostKeyPress(KeyEvent.VK_9))
}
0b11011111 -> {
// read column 5
scanColumn(HostKeyPress(KeyEvent.VK_COMMA), HostKeyPress(KeyEvent.VK_AT), HostKeyPress(KeyEvent.VK_COLON),
HostKeyPress(KeyEvent.VK_PERIOD), HostKeyPress(KeyEvent.VK_MINUS), HostKeyPress(KeyEvent.VK_L),
HostKeyPress(KeyEvent.VK_P), HostKeyPress(KeyEvent.VK_PLUS))
}
0b10111111 -> {
// read column 6
scanColumn(HostKeyPress(KeyEvent.VK_SLASH), HostKeyPress(KeyEvent.VK_CIRCUMFLEX), HostKeyPress(KeyEvent.VK_EQUALS),
HostKeyPress(KeyEvent.VK_SHIFT, rightSide = true), // right shift
HostKeyPress(KeyEvent.VK_HOME), HostKeyPress(KeyEvent.VK_SEMICOLON), HostKeyPress(KeyEvent.VK_ASTERISK),
HostKeyPress(KeyEvent.VK_DEAD_TILDE) // pound sign
)
}
0b01111111 -> {
// read column 7
scanColumn(HostKeyPress(KeyEvent.VK_ESCAPE), HostKeyPress(KeyEvent.VK_Q), HostKeyPress(KeyEvent.VK_ALT),
HostKeyPress(KeyEvent.VK_SPACE), HostKeyPress(KeyEvent.VK_2), HostKeyPress(KeyEvent.VK_CONTROL),
HostKeyPress(KeyEvent.VK_BACK_QUOTE), HostKeyPress(KeyEvent.VK_1))
}
else -> {
// invalid column selection
0xff
}
}
}
} else ramBuffer[register]
}
return when (register) {
0x04 -> (timerAactual and 0xff).toShort()
@ -224,19 +251,6 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu:
}
}
private fun toBCD(data: Int): UByte {
val tens = data/10
val ones = data-tens*10
return ((tens shl 4) or ones).toShort()
}
private fun fromBCD(bcd: UByte): Int {
val ibcd = bcd.toInt()
val tens = ibcd ushr 4
val ones = ibcd and 0x0f
return tens*10+ones
}
override operator fun set(offset: Int, data: UByte) {
val register = offset and 15
if (number == 1 && register == 0x00) {
@ -296,6 +310,19 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu:
}
}
private fun toBCD(data: Int): UByte {
val tens = data/10
val ones = data-tens*10
return ((tens shl 4) or ones).toShort()
}
private fun fromBCD(bcd: UByte): Int {
val ibcd = bcd.toInt()
val tens = ibcd ushr 4
val ones = ibcd and 0x0f
return tens*10+ones
}
fun hostKeyPressed(event: KeyEvent) {
val rightSide = event.keyLocation == KeyEvent.KEY_LOCATION_RIGHT
val numpad = event.keyLocation == KeyEvent.KEY_LOCATION_NUMPAD
@ -374,4 +401,15 @@ class Cia(val number: Int, startAddress: Address, endAddress: Address, val cpu:
}
}
}
fun setJoystick2(up: Boolean, down: Boolean, left: Boolean, right: Boolean, fire: Boolean) {
if(number!=1)
throw NotImplementedError("joystick port 2 is connected to cia#1")
joy2up = up
joy2down = down
joy2left = left
joy2right = right
joy2fire = fire
}
}

38
src/main/kotlin/razorvine/c64emu/GUI.kt
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@ -82,16 +82,50 @@ class MainC64Window(title: String, chargen: Rom, val ram: MemoryComponent, val c
// keyboard events:
override fun keyTyped(event: KeyEvent) {}
private var joy2up = false
private var joy2down = false
private var joy2left = false
private var joy2right = false
private var joy2fire = false
override fun keyPressed(event: KeyEvent) {
// '\' is mapped as RESTORE, this causes a NMI on the cpu
if (event.keyChar == '\\') {
cpu.nmiAsserted = true
} else {
keypressCia.hostKeyPressed(event)
if(event.keyLocation==KeyEvent.KEY_LOCATION_NUMPAD) {
// numpad is joystick #2
if (event.keyChar in "789") joy2up = true
if (event.keyChar in "123") joy2down = true
if (event.keyChar in "741") joy2left = true
if (event.keyChar in "963") joy2right = true
if (event.keyChar in "05\n") joy2fire = true
keypressCia.setJoystick2(joy2up, joy2down, joy2left, joy2right, joy2fire)
} else {
keypressCia.hostKeyPressed(event)
}
}
}
override fun keyReleased(event: KeyEvent) {
keypressCia.hostKeyPressed(event)
if(event.keyLocation==KeyEvent.KEY_LOCATION_NUMPAD) {
// numpad is joystick #2
if (event.keyChar in "789") joy2up = false
if (event.keyChar in "123") joy2down = false
if (event.keyChar in "741") joy2left = false
if (event.keyChar in "963") joy2right = false
if (event.keyChar in "05\n") joy2fire = false
keypressCia.setJoystick2(joy2up, joy2down, joy2left, joy2right, joy2fire)
} else {
keypressCia.hostKeyPressed(event)
}
}
fun reset() {
joy2up = false
joy2down = false
joy2left = false
joy2right = false
joy2fire = false
}
}

5
src/main/kotlin/razorvine/c64emu/c64Main.kt
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@ -216,6 +216,11 @@ class C64Machine(title: String) : IVirtualMachine {
while (cpu.instrCycles > 0) bus.clock()
}
override fun reset() {
bus.reset()
hostDisplay.reset()
}
override fun executeMonitorCommand(command: String) = monitor.command(command)
fun start() {

1
src/main/kotlin/razorvine/examplemachines/DebugWindow.kt
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@ -182,6 +182,7 @@ class DebugWindow(private val vm: IVirtualMachine) : JFrame("Debugger - ksim65 v
}
"reset" -> {
vm.reset()
vm.bus.reset()
updateCpu(vm.cpu, vm.bus)
}

4
src/main/kotlin/razorvine/examplemachines/GUI.kt
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@ -242,4 +242,8 @@ class MainWindow(title: String) : JFrame(title), KeyListener, MouseInputListener
else keyboardBuffer.pop()
}
fun reset() {
// when the reset button is pressed
}
}

5
src/main/kotlin/razorvine/examplemachines/machineMain.kt
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@ -65,6 +65,11 @@ class VirtualMachine(title: String) : IVirtualMachine {
while (cpu.instrCycles > 0) bus.clock()
}
override fun reset() {
bus.reset()
hostDisplay.reset()
}
override fun executeMonitorCommand(command: String) = monitor.command(command)
fun start() {

1
src/main/kotlin/razorvine/ksim65/IVirtualMachine.kt
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@ -7,6 +7,7 @@ import java.io.File
interface IVirtualMachine {
fun step()
fun pause(paused: Boolean)
fun reset()
fun getZeroAndStackPages(): Array<UByte>
fun loadFileInRam(file: File, loadAddress: Address?)

2
src/main/resources/version.properties
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@ -1 +1 @@
version=1.8
version=1.9-dev