MMC mostly completed.

chip/mmc.js

@@ -26,9 +26,13 @@ class Bank{
   }
 }
 
+
+
 class MMC{
   constructor(){
     this.__banks = [];
+    this.__addr = 0;
+    this.__bnkidx = 0;
   }
 
   get size(){
@@ -39,10 +43,58 @@ class MMC{
 
   get banks(){return this.__banks.length;}
 
-  // TODO: Add a get/set for the memory address. This should handle banking and memory address offsets.
-  // TODO: Add a get/set for memory data at the current address.
-  // TODO: Add method for adding memory modules}
-  // TODO: Add a connection between a memory address and the triggering of bank switching.
+  get address(){return this.__addr;}
+  set address(a){
+    if (a >= 0 && a < this.size){
+      this.__addr = a;
+      offset = 0;
+      for (let b=0; b < this.__banks.length; b++){
+        if (a >= offset && a < offset + this.__banks[b].mem.size){
+          this.__bnkidx = b;
+          this.__banks[b].mem.address = a - offset;
+          break;
+        } else {
+          offset += this.__banks[b].mem.size;
+        }
+      }
+    }
+  }
+
+  get byte(){return (this.__banks.length > 0) ? this.__banks[this.__bnkidx].mem.byte : -1;}
+  set byte(b){
+    if (this.__banks.length > 0){
+      this.__banks[this.__bnkidx].mem.byte = b;
+    }
+  }
+
+  connectMemory(mem, addroff){
+    addroff = (typeof(addroff) === 'number' && addroff >= 0) ? addroff : -1;
+    if (addroff < 0 || addroff === this.size){
+      this.__banks.push(new Bank(mem));
+    } else {
+      offset = 0;
+      for (let b=0; b < this.__banks.length; b++){
+        if (addroff === offset){
+          if (this.__banks[b].mem.size !== mem.size)
+            throw new RangeError("Memory modules assigned to the same bank must be the same byte size.");
+          this.__banks[b].addMemModule(mem);
+          offset = -1;
+          break;
+        } else {
+          offset += this.__banks[b].mem.size;
+        }
+      }
+      if (offset >= 0)
+        throw new RangeError("Cannot align memory module to bank at address " + addroff);
+    }
+    return this;
+  }
+  
+  mmSwitchCallback(){
+    return (function(byte){
+      // TODO: Check the bits to determin which bank and bank index is being switched on.
+    }).bind(this);
+  }
 }
 
 module.exports = MMC;