diff --git a/src/Terminal.test.ts b/src/Terminal.test.ts
index 946e9efb..12467d84 100644
--- a/src/Terminal.test.ts
+++ b/src/Terminal.test.ts
@@ -578,6 +578,99 @@ describe('term.js addons', () => {
       assert.equal(term.evaluateKeyEscapeSequence({ ctrlKey: true, keyCode: 122 }).key, '\x1b[23;5~');
       assert.equal(term.evaluateKeyEscapeSequence({ ctrlKey: true, keyCode: 123 }).key, '\x1b[24;5~');
     });
+
+    // Characters using ctrl+alt sequences
+    it('should return proper sequence for ctrl+alt+a', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, ctrlKey: true, keyCode: 65 }).key, '\x1b\x01');
+    });
+
+    // Characters using alt sequences (numbers)
+    it('should return proper sequences for alt+0', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 48 }).key, '\x1b0');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 48 }).key, '\x1b)');
+    });
+    it('should return proper sequences for alt+1', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 49 }).key, '\x1b1');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 49 }).key, '\x1b!');
+    });
+    it('should return proper sequences for alt+2', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 50 }).key, '\x1b2');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 50 }).key, '\x1b@');
+    });
+    it('should return proper sequences for alt+3', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 51 }).key, '\x1b3');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 51 }).key, '\x1b#');
+    });
+    it('should return proper sequences for alt+4', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 52 }).key, '\x1b4');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 52 }).key, '\x1b$');
+    });
+    it('should return proper sequences for alt+5', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 53 }).key, '\x1b5');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 53 }).key, '\x1b%');
+    });
+    it('should return proper sequences for alt+6', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 54 }).key, '\x1b6');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 54 }).key, '\x1b^');
+    });
+    it('should return proper sequences for alt+7', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 55 }).key, '\x1b7');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 55 }).key, '\x1b&');
+    });
+    it('should return proper sequences for alt+8', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 56 }).key, '\x1b8');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 56 }).key, '\x1b*');
+    });
+    it('should return proper sequences for alt+9', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 57 }).key, '\x1b9');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 57 }).key, '\x1b(');
+    });
+
+    // Characters using alt sequences (special chars)
+    it('should return proper sequences for alt+;', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 186 }).key, '\x1b;');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 186 }).key, '\x1b:');
+    });
+    it('should return proper sequences for alt+=', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 187 }).key, '\x1b=');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 187 }).key, '\x1b+');
+    });
+    it('should return proper sequences for alt+,', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 188 }).key, '\x1b,');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 188 }).key, '\x1b<');
+    });
+    it('should return proper sequences for alt+-', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 189 }).key, '\x1b-');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 189 }).key, '\x1b_');
+    });
+    it('should return proper sequences for alt+.', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 190 }).key, '\x1b.');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 190 }).key, '\x1b>');
+    });
+    it('should return proper sequences for alt+/', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 191 }).key, '\x1b/');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true, keyCode: 191 }).key, '\x1b?');
+    });
+    it('should return proper sequences for alt+~', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 192 }).key, '\x1b`');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true, keyCode: 192 }).key, '\x1b~');
+    });
+    it('should return proper sequences for alt+[', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 219 }).key, '\x1b[');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 219 }).key, '\x1b{');
+    });
+    it('should return proper sequences for alt+\\', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 220 }).key, '\x1b\\');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 220 }).key, '\x1b|');
+    });
+    it('should return proper sequences for alt+]', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 221 }).key, '\x1b]');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 221 }).key, '\x1b}');
+    });
+    it('should return proper sequences for alt+\'', () => {
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: false, keyCode: 222 }).key, '\x1b\'');
+      assert.equal(term.evaluateKeyEscapeSequence({ altKey: true, shiftKey: true,  keyCode: 222 }).key, '\x1b"');
+    });
   });
 
   describe('Third level shift', () => {
diff --git a/src/Terminal.ts b/src/Terminal.ts
index 4c41fb5e..ef2349f2 100644
--- a/src/Terminal.ts
+++ b/src/Terminal.ts
@@ -49,6 +49,34 @@ import { AccessibilityManager } from './AccessibilityManager';
 import { ScreenDprMonitor } from './utils/ScreenDprMonitor';
 import { ITheme, ILocalizableStrings } from 'xterm';
 
+// reg + shift key mappings for digits and special chars
+const KEYCODE_KEY_MAPPINGS = {
+  // digits 0-9
+  48: ['0', ')'],
+  49: ['1', '!'],
+  50: ['2', '@'],
+  51: ['3', '#'],
+  52: ['4', '$'],
+  53: ['5', '%'],
+  54: ['6', '^'],
+  55: ['7', '&'],
+  56: ['8', '*'],
+  57: ['9', '('],
+
+  // special chars
+  186: [';', ':'],
+  187: ['=', '+'],
+  188: [',', '<'],
+  189: ['-', '_'],
+  190: ['.', '>'],
+  191: ['/', '?'],
+  192: ['`', '~'],
+  219: ['[', '{'],
+  220: ['\\', '|'],
+  221: [']', '}'],
+  222: ['\'', '"']
+};
+
 // Let it work inside Node.js for automated testing purposes.
 const document = (typeof window !== 'undefined') ? window.document : null;
 
@@ -1762,14 +1790,15 @@ export class Terminal extends EventEmitter implements ITerminal, IInputHandlingT
             // ^] - Operating System Command (OSC)
             result.key = String.fromCharCode(29);
           }
-        } else if ((!this.browser.isMac || this.options.macOptionIsMeta) && ev.altKey && !ev.ctrlKey && !ev.metaKey) {
+        } else if ((!this.browser.isMac || this.options.macOptionIsMeta) && ev.altKey && !ev.metaKey) {
           // On macOS this is a third level shift when !macOptionIsMeta. Use <Esc> instead.
-          if (ev.keyCode >= 65 && ev.keyCode <= 90) {
-            result.key = C0.ESC + String.fromCharCode(ev.keyCode + 32);
-          } else if (ev.keyCode === 192) {
-            result.key = C0.ESC + '`';
-          } else if (ev.keyCode >= 48 && ev.keyCode <= 57) {
-            result.key = C0.ESC + (ev.keyCode - 48);
+          const keyMapping = KEYCODE_KEY_MAPPINGS[ev.keyCode];
+          const key = keyMapping && keyMapping[!ev.shiftKey ? 0 : 1];
+          if (key) {
+            result.key = C0.ESC + key;
+          } else if (ev.keyCode >= 65 && ev.keyCode <= 90) {
+            const keyCode = ev.ctrlKey ? ev.keyCode - 64 : ev.keyCode + 32;
+            result.key = C0.ESC + String.fromCharCode(keyCode);
           }
         } else if (this.browser.isMac && !ev.altKey && !ev.ctrlKey && ev.metaKey) {
           if (ev.keyCode === 65) { // cmd + a