Corrective tweaks

app/Emulator.js

@@ -11,6 +11,9 @@
     // Object constructor
     constructor() {
 
+        // Configure instance fields
+        this.buffers = {};
+
         // Configure message port
         onmessage = e=>this.onmessage(e.data);
     }
@@ -33,12 +36,11 @@
 
         // Load and instantiate the WebAssembly module
         this.wasm = await WebAssembly.instantiate(msg.wasm,
-            { env: { emscripten_notify_memory_growth: function(){} }});
+            { env: { emscripten_notify_memory_growth: ()=>this.onmemory() }});
         this.wasm.instance.exports.Init();
 
         // Configure instance fields
-        this.core   = this.wasm.instance.exports;
-        this.memory = this.core.memory.buffer;
+        this.core = this.wasm.instance.exports;
 
         postMessage({ command: "Init" });
     }
@@ -47,9 +49,9 @@
     readBuffer(msg) {
         let buffer = this.malloc(Uint8Array, msg.size);
         this.core.ReadBuffer(msg.sim, buffer.pointer, msg.address, msg.size);
-        msg.buffer = buffer.buffer.slice(
+        msg.buffer = this.core.memory.buffer.slice(
             buffer.pointer, buffer.pointer + msg.size);
-        this.core.Free(buffer.pointer);
+        this.free(buffer);
         postMessage(msg, msg.buffer);
     }
 
@@ -58,7 +60,7 @@
         let rom    = new Uint8Array(msg.rom);
         let buffer = this.malloc(Uint8Array, rom.length);
         for (let x = 0; x < rom.length; x++)
-            buffer[x] = rom[x];
+            buffer.data[x] = rom[x];
         msg.success = !!this.core.SetROM(msg.sim, buffer.pointer, rom.length);
         delete msg.rom;
         postMessage(msg);
@@ -66,14 +68,27 @@
 
 
 
-    ///////////////////////////// Utility Methods /////////////////////////////
+    ///////////////////////////// Private Methods /////////////////////////////
+
+    // Delete a previously-allocated memory buffer
+    free(buffer) {
+        this.core.Free(buffer.pointer);
+        delete this.buffers[buffer.pointer];
+    }
 
     // Allocate a typed array in WebAssembly core memory
     malloc(type, size) {
         let pointer = this.core.Malloc(size);
-        let ret     = new type(this.memory, pointer, size);
-        ret.pointer = pointer;
-        return ret;
+        let data    = new type(this.core.memory.buffer, pointer, size);
+        return this.buffers[pointer] = { data: data, pointer: pointer };
+    }
+
+    // WebAssembly memory has grown
+    onmemory() {
+        for (let buffer of Object.values(this.buffers)) {
+            buffer.data = new buffer.data.constructor(
+                this.core.memory.buffer, buffer.pointer);
+        }
     }
 
 }).initializer();

app/windows/MemoryWindow.js

@@ -96,8 +96,7 @@ globalThis.MemoryWindow = class MemoryWindow extends Toolkit.Window {
 
     // Determine the height in pixels of one row of output
     lineHeight() {
-        let ret = this.rows[0].address.getBounds().height;
-        return ret;
+        return Math.max(1, this.rows[0].address.getBounds().height);
     }
     
     // Determine the number of rows of output
@@ -106,7 +105,7 @@ globalThis.MemoryWindow = class MemoryWindow extends Toolkit.Window {
         lineHeight   = lineHeight   || this.lineHeight();
         let ret      = clientHeight / lineHeight;
         ret          = fullyVisible ? Math.floor(ret) : Math.ceil(ret);
-        return Math.max(1, Math.min(ret, Math.floor(clientHeight / 8)));
+        return Math.max(1, ret);
     }
     
     // Key down event handler
@@ -115,7 +114,7 @@ globalThis.MemoryWindow = class MemoryWindow extends Toolkit.Window {
         // Control is pressed
         if (e.ctrlKey) switch (e.key) {
             case "g": case "G":
-                let addr = prompt(this.application.translate("{app.romLoaded}"));
+                let addr = prompt(this.application.translate("{app.goto_}"));
                 if (addr === null)
                     break;
                 this.seek(