Tweaks to MOSCIA

src/MOSCIA.js

@@ -1,3 +1,4 @@
+const IO = require('./common/io.js');
 const BCD = require('./utils/bcd.js');
 const BITM = require('./utils/bitman.js');
 
@@ -143,6 +144,7 @@ function Tick(cia){
 
 class MOSCIA{
   constructor(){
+    this.__io = new IO(["PDA", "PDB"], ["PDA", "PDB"]);
     this.__regsel = 0;
     this.__RW = 0;
 
@@ -186,13 +188,15 @@ class MOSCIA{
     let val = 0;
     switch(this.__regsel){
       case 0x00: // Peripheral Data A
-        break;
+        this.__io.triggerRead("PDA", this.__DDA);
+        val = this.__PDA; break;
       case 0x01: // Peripheral Data B
-        break;
+        this.__io.triggerRead("PDB", this.__DDB);
+        val = this.__PDB; break;
       case 0x02: // Data Direction Reg A
-        break;
+        val = this.__DDA; break;
       case 0x03: // Data Direction Reg B
-        break;
+        val = this.__DDB; break;
       case 0x04: // Timer A Low
         val = (this.__timerA & 0x00FF); break;
       case 0x05: // Timer A High
@@ -230,12 +234,18 @@ class MOSCIA{
     let tod = 0;
     switch(this.__regsel){
       case 0x00: // Peripheral Data A
+        this.__io.triggerWrite("PDA", this.__PDA, d & 0xFF);
+        this.__PDA = (this.__PDA & (~this.__DDA)) | ((d & 0xFF) & this.__DDA);
         break;
       case 0x01: // Peripheral Data B
+        this.__io.triggerWrite("PDB", this.__PDB, d & 0xFF);
+        this.__PDB = (this.__PDB & (~this.__DDB)) | ((d & 0xFF) & this.__DDB);
         break;
       case 0x02: // Data Direction Reg A
+        this.__DDA = d & 0xFF;
         break;
       case 0x03: // Data Direction Reg B
+        this.__DDB = d & 0xFF;
         break;
       case 0x04: // Timer A Low
         this.__timerALatch = (this.__timerALatch & 0xFF00) | (d & 0xFF);
@@ -324,6 +334,25 @@ class MOSCIA{
     }
   }
 
+  onRead(name, fn){
+    this.__io.onRead(name, fn);
+    return this;
+  }
+
+  onWrite(name, fn){
+    this.__io.onWrite(name, fn);
+    return this;
+  }
+
+  setPDA(v){
+    this.__PDA = (this.__PDA & this.__DDA) | ((v & 0xFF) & (~this.__DDA));
+    return this;
+  }
+
+  setPDB(v){
+    this.__PDB = (this.__PDB & this.__DDB) | ((v & 0xFF) & (~this.__DDB));
+    return this;
+  }
 
   reset(){
     this.__CNT = 0;
@@ -350,6 +379,7 @@ class MOSCIA{
     this.__TOD = [0,0,0,0];
     this.__LTOD = [0,0,0,0];
     this.__ALTOD = [0,0,0,0];
+    return this;
   }
 }