diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
index 070db9f..7cc77c0 100644
--- a/.github/workflows/nodejs.yml
+++ b/.github/workflows/nodejs.yml
@@ -17,9 +17,6 @@ jobs:
       uses: actions/setup-node@v1
       with:
         node-version: ${{ matrix.node-version }}
-    - uses: webfactory/ssh-agent@v0.5.0
-      with:
-        ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
     - name: npm install, build, and test
       run: |
         npm ci
diff --git a/apple2js.html b/apple2js.html
index 7eb7950..b6acb39 100644
--- a/apple2js.html
+++ b/apple2js.html
@@ -240,11 +240,15 @@
           </table>
           <form action="#">
             <input type="file" id="local_file" />
+            <div id="local_file_address_input" style="display: none">
+              $
+              <input id="local_file_address" />
+            </div>
           </form>
         </main>
         <footer class="modal__footer">
           <button class="modal__btn" data-micromodal-close aria-label="Close this dialog window">Cancel</button>
-          <button class="modal__btn" onclick="Apple2.doLoad()" aria-label="Open the selected disk">Open</button>
+          <button class="modal__btn" onclick="Apple2.doLoad(event)" aria-label="Open the selected disk">Open</button>
         </footer>
       </div>
     </div>
diff --git a/apple2jse.html b/apple2jse.html
index fe2f208..1798561 100644
--- a/apple2jse.html
+++ b/apple2jse.html
@@ -249,11 +249,15 @@
           </table>
           <form action="#">
             <input type="file" id="local_file" />
+            <div id="local_file_address_input" style="display: none">
+              $
+              <input id="local_file_address" />
+            </div>
           </form>
         </main>
         <footer class="modal__footer">
           <button class="modal__btn" data-micromodal-close aria-label="Close this dialog window">Cancel</button>
-          <button class="modal__btn" onclick="Apple2.doLoad()" aria-label="Open the selected disk">Open</button>
+          <button class="modal__btn" onclick="Apple2.doLoad(event)" aria-label="Open the selected disk">Open</button>
         </footer>
       </div>
     </div>
diff --git a/js/gl.ts b/js/gl.ts
index d35301b..1e1b217 100644
--- a/js/gl.ts
+++ b/js/gl.ts
@@ -517,6 +517,8 @@ export class HiresPageGL implements HiresPage {
                 }
             } else if (bank === 0) {
                 const hbs = val & 0x80;
+                const lastCol = col === 39;
+                const cropLastPixel = hbs && lastCol;
                 const dx = col * 14;
                 let offset = dx * 4 + dy * 560 * 4;
                 if (hbs) {
@@ -530,21 +532,24 @@ export class HiresPageGL implements HiresPage {
                 }
                 let bits = val;
                 for (let idx = 0; idx < 7; idx++, offset += 8) {
+                    const drawPixel = cropLastPixel && idx == 6
+                        ? this._drawHalfPixel
+                        : this._drawPixel;
                     if (bits & 0x01) {
-                        this._drawPixel(data, offset, whiteCol);
+                        drawPixel(data, offset, whiteCol);
                     } else {
-                        this._drawPixel(data, offset, blackCol);
+                        drawPixel(data, offset, blackCol);
                     }
                     bits >>= 1;
                 }
+                if (!this._refreshing) {
+                    this._refreshing = true;
+                    const after = addr + 1;
+                    this._write(after >> 8, after & 0xff, this._buffer[0][after & 0x1fff], 0);
+                    this._refreshing = false;
+                }
             }
         }
-        if (!this._refreshing && !doubleHiresMode && bank === 0) {
-            this._refreshing = true;
-            const after = addr + 1;
-            this._write(after >> 8, after & 0xff, this._buffer[0][after & 0x1fff], 0);
-            this._refreshing = false;
-        }
     }
 
     refresh() {
diff --git a/js/ui/apple2.ts b/js/ui/apple2.ts
index 8393fbf..8d2b958 100644
--- a/js/ui/apple2.ts
+++ b/js/ui/apple2.ts
@@ -49,6 +49,8 @@ type DiskCollection = {
     [name: string]: DiskDescriptor[]
 };
 
+const KNOWN_FILE_TYPES = [...DISK_FORMATS, ...TAPE_TYPES] as readonly string[];
+
 const disk_categories: DiskCollection = { 'Local Saves': [] };
 const disk_sets: DiskCollection = {};
 // Disk names
@@ -239,7 +241,7 @@ export function loadAjax(drive: DriveNumber, url: string) {
     });
 }
 
-export function doLoad() {
+export function doLoad(event: MouseEvent|KeyboardEvent) {
     MicroModal.close('load-modal');
     const select = document.querySelector<HTMLSelectElement>('#disk_select')!;
     const urls = select.value;
@@ -255,7 +257,8 @@ export function doLoad() {
     const localFile = document.querySelector<HTMLInputElement>('#local_file')!;
     const files = localFile.files;
     if (files && files.length == 1) {
-        doLoadLocal(_currentDrive, files[0]);
+        const runOnLoad = event.shiftKey;
+        doLoadLocal(_currentDrive, files[0], { runOnLoad });
     } else if (url) {
         let filename;
         MicroModal.close('load-modal');
@@ -317,7 +320,18 @@ function doLoadLocal(drive: DriveNumber, file: File, options: Partial<LoadOption
     } else if (BIN_TYPES.includes(ext) || type === '06' || options.address) {
         doLoadBinary(file, { address: parseInt(aux || '2000', 16), ...options });
     } else {
-        openAlert('Unknown file type: ' + ext);
+        const addressInput = document.querySelector<HTMLInputElement>('#local_file_address');
+        const addressStr = addressInput?.value;
+        if (addressStr) {
+            const address = parseInt(addressStr, 16);
+            if (isNaN(address)) {
+                openAlert('Invalid address: ' + addressStr);
+                return;
+            }
+            doLoadBinary(file, { address, ...options });
+        } else {
+            openAlert('Unknown file type: ' + ext);
+        }
     }
 }
 
@@ -523,7 +537,8 @@ export function reset() {
 }
 
 function loadBinary(bin: JSONBinaryImage) {
-    for (let idx = 0; idx < bin.length; idx++) {
+    const maxLen = Math.min(bin.length, 0x10000 - bin.start);
+    for (let idx = 0; idx < maxLen; idx++) {
         const pos = bin.start + idx;
         cpu.write(pos, bin.data[idx]);
     }
@@ -559,8 +574,8 @@ export function selectDisk() {
     localFile.value = '';
 }
 
-export function clickDisk() {
-    doLoad();
+export function clickDisk(event: MouseEvent|KeyboardEvent) {
+    doLoad(event);
 }
 
 /** Called to load disks from the local catalog. */
@@ -854,6 +869,22 @@ function onLoaded(apple2: Apple2, disk2: DiskII, smartPort: SmartPort, printer:
             _apple2.run();
         });
     }
+
+    document.querySelector<HTMLInputElement>('#local_file')?.addEventListener(
+        'change',
+        (event: Event) => {
+            const target = event.target as HTMLInputElement;
+            const address = document.querySelector<HTMLInputElement>('#local_file_address_input')!;
+            const parts = target.value.split('.');
+            const ext = parts[parts.length - 1];
+
+            if (KNOWN_FILE_TYPES.includes(ext)) {
+                address.style.display = 'none';
+            } else {
+                address.style.display = 'inline-block';
+            }
+        }
+    );
 }
 
 export function initUI(apple2: Apple2, disk2: DiskII, smartPort: SmartPort, printer: Printer, e: boolean) {