read() without inputstream

tsvm_core/src/net/torvald/tsvm/VMJSR223Delegate.kt

@@ -1,11 +1,9 @@
 package net.torvald.tsvm
 
 import net.torvald.UnsafeHelper
-import net.torvald.UnsafePtr
 import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.toUint
 import net.torvald.terrarum.modulecomputers.virtualcomputer.tvd.toUlong
 import net.torvald.tsvm.peripheral.*
-import java.nio.charset.Charset
 
 /**
  * Pass the instance of the class to the ScriptEngine's binding, preferably under the namespace of "vm"
@@ -177,10 +175,24 @@ class VMJSR223Delegate(private val vm: VM) {
      * ^A-^Z: 1 through 26
      */
     fun readKey(): Int {
-        val inputStream = vm.getInputStream()
+        /*val inputStream = vm.getInputStream()
         var key: Int = inputStream.read()
         inputStream.close()
-        return key
+        return key*/
+
+        // impl that doesn't rely on InputStream
+        vm.getIO().let {
+            it.mmio_write(38, 1)
+
+            vm.isIdle.set(true)
+            while (it.mmio_read(49L) == 0.toByte()) {
+                Thread.sleep(6L)
+            }
+            vm.isIdle.set(false)
+
+            it.mmio_write(38, 0)
+            return it.mmio_read(37L)!!.toUint()
+        }
     }
 
     /**
@@ -188,11 +200,12 @@ class VMJSR223Delegate(private val vm: VM) {
      * characters (e.g. arrow keys) won't work.
      */
     fun read(): String {
-        val inputStream = vm.getInputStream()
+//        val inputStream = vm.getInputStream()
         val sb = StringBuilder()
         var key: Int
         do {
-            key = inputStream.read()
+//            key = inputStream.read()
+            key = readKey()
 
             if ((key == 8 && sb.isNotEmpty()) || key in 0x20..0x7E) {
                 this.print("${key.toChar()}")
@@ -205,7 +218,7 @@ class VMJSR223Delegate(private val vm: VM) {
         } while (key != 13 && key != 10)
         this.print("\n") // printout \n
 
-        inputStream.close()
+//        inputStream.close()
         return sb.toString()
     }
 
@@ -214,11 +227,12 @@ class VMJSR223Delegate(private val vm: VM) {
      * characters (e.g. arrow keys) won't work.
      */
     fun readNoEcho(): String {
-        val inputStream = vm.getInputStream()
+//        val inputStream = vm.getInputStream()
         val sb = StringBuilder()
         var key: Int
         do {
-            key = inputStream.read()
+//            key = inputStream.read()
+            key = readKey()
 
             when (key) {
                 8 -> if (sb.isNotEmpty()) sb.deleteCharAt(sb.lastIndex)
@@ -227,7 +241,7 @@ class VMJSR223Delegate(private val vm: VM) {
         } while (key != 13 && key != 10)
         this.println() // printout \n
 
-        inputStream.close()
+//        inputStream.close()
         return sb.toString()
     }
 

tsvm_core/src/net/torvald/tsvm/peripheral/GraphicsAdapter.kt

@@ -1003,6 +1003,7 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
             }
 
             override fun read(): Int {
+                vm.getIO().mmio_write(49L, 0)
                 var key: Byte
                 do {
                     Thread.sleep(4L) // if spinning rate is too fast, this function will fail.
@@ -1011,6 +1012,7 @@ open class GraphicsAdapter(private val assetsRoot: String, val vm: VM, val confi
                 } while (key == (-1).toByte())
 
                 //println("[stdin] key = $key")
+                vm.getIO().mmio_write(49L, 1)
                 return key.toInt().and(255)
             }
 

tsvm_core/src/net/torvald/tsvm/peripheral/IOSpace.kt

@@ -104,6 +104,7 @@ class IOSpace(val vm: VM) : PeriBase("io"), InputProcessor {
             39L -> rawInputFunctionLatched.toInt().toByte()
             in 40..47 -> keyEventBuffers[adi - 40]
             48L -> (vm.resetDown.toInt(7) or vm.sysrqDown.toInt(6) or vm.stopDown.toInt()).toByte()
+            49L -> keyPushed.toInt().toByte()
 
             in 64..67 -> vm.memsize.shr((adi - 64) * 8).toByte()
             68L -> (uptimeCounterLatched.toInt() or RTClatched.toInt(1)).toByte()
@@ -161,6 +162,7 @@ class IOSpace(val vm: VM) : PeriBase("io"), InputProcessor {
     }
 
     private val hyveArea = ByteArray(2048)
+    private var keyPushed = false
 
     override fun mmio_write(addr: Long, byte: Byte) {
         val adi = addr.toInt()
@@ -180,6 +182,7 @@ class IOSpace(val vm: VM) : PeriBase("io"), InputProcessor {
 
                 39L -> rawInputFunctionLatched = (byte.isNonZero())
                 in 40..47 -> keyEventBuffers[adi - 40] = byte
+                49L -> keyPushed = (bi != 0)
                 68L -> {
                     uptimeCounterLatched = byte.and(0b01).isNonZero()
                     RTClatched = byte.and(0b10).isNonZero()
@@ -341,10 +344,14 @@ class IOSpace(val vm: VM) : PeriBase("io"), InputProcessor {
     override fun keyTyped(p0: Char): Boolean {
         if (keyboardInputRequested && p0.toInt() > 0) {
             //println("[IO] key typed = ${p0.toInt()}")
+            keyPushed = true
             keyboardBuffer.appendHead(p0.toByte())
+            Thread.sleep(6L)
+            keyPushed = false
             return true
         }
         else {
+            keyPushed = false
             return false
         }
     }