diff --git a/src/InputHandler.ts b/src/InputHandler.ts
index 68dfc3d5..08b1e84b 100644
--- a/src/InputHandler.ts
+++ b/src/InputHandler.ts
@@ -1237,13 +1237,13 @@ export class InputHandler extends Disposable implements IInputHandler {
    */
   public setMode(params: IParams, collect?: string): void {
     for (let i = 0; i < params.length; i++) {
-      this._setMode([params.params[i]], collect);
+      this._setMode(params.params[i], collect);
     }
   }
 
-  private _setMode(params: number[], collect?: string): void {
+  private _setMode(param: number, collect?: string): void {
     if (!collect) {
-      switch (params[0]) {
+      switch (param) {
         case 4:
           this._terminal.insertMode = true;
           break;
@@ -1252,7 +1252,7 @@ export class InputHandler extends Disposable implements IInputHandler {
           break;
       }
     } else if (collect === '?') {
-      switch (params[0]) {
+      switch (param) {
         case 1:
           this._terminal.applicationCursor = true;
           break;
@@ -1295,9 +1295,9 @@ export class InputHandler extends Disposable implements IInputHandler {
 
           // TODO: Why are params[0] compares nested within a switch for params[0]?
 
-          this._terminal.x10Mouse = params[0] === 9;
-          this._terminal.vt200Mouse = params[0] === 1000;
-          this._terminal.normalMouse = params[0] > 1000;
+          this._terminal.x10Mouse = param === 9;
+          this._terminal.vt200Mouse = param === 1000;
+          this._terminal.normalMouse = param > 1000;
           this._terminal.mouseEvents = true;
           if (this._terminal.element) {
             this._terminal.element.classList.add('enable-mouse-events');
@@ -1440,13 +1440,13 @@ export class InputHandler extends Disposable implements IInputHandler {
    */
   public resetMode(params: IParams, collect?: string): void {
     for (let i = 0; i < params.length; i++) {
-      this._resetMode([params.params[i]], collect);
+      this._resetMode(params.params[i], collect);
     }
   }
 
-  private _resetMode(params: number[], collect?: string): void {
+  private _resetMode(param: number, collect?: string): void {
     if (!collect) {
-      switch (params[0]) {
+      switch (param) {
         case 4:
           this._terminal.insertMode = false;
           break;
@@ -1455,7 +1455,7 @@ export class InputHandler extends Disposable implements IInputHandler {
           break;
       }
     } else if (collect === '?') {
-      switch (params[0]) {
+      switch (param) {
         case 1:
           this._terminal.applicationCursor = false;
           break;
@@ -1520,7 +1520,7 @@ export class InputHandler extends Disposable implements IInputHandler {
         case 1047: // normal screen buffer - clearing it first
           // Ensure the selection manager has the correct buffer
           this._terminal.buffers.activateNormalBuffer();
-          if (params[0] === 1049) {
+          if (param === 1049) {
             this.restoreCursor();
           }
           this._terminal.refresh(0, this._terminal.rows - 1);
@@ -1900,6 +1900,7 @@ export class InputHandler extends Disposable implements IInputHandler {
    *   Set Scrolling Region [top;bottom] (default = full size of win-
    *   dow) (DECSTBM).
    * CSI ? Pm r
+   *   currently skipped
    */
   public setScrollRegion(params: IParams, collect?: string): void {
     if (collect) {
diff --git a/src/Types.d.ts b/src/Types.d.ts
index 1cab66ef..a70c142d 100644
--- a/src/Types.d.ts
+++ b/src/Types.d.ts
@@ -113,42 +113,42 @@ export interface IInputHandler {
   /** C0 SO */ shiftOut(): void;
   /** C0 SI */ shiftIn(): void;
 
-  /** CSI @ */ insertChars(params?: IParams): void;
-  /** CSI A */ cursorUp(params?: IParams): void;
-  /** CSI B */ cursorDown(params?: IParams): void;
-  /** CSI C */ cursorForward(params?: IParams): void;
-  /** CSI D */ cursorBackward(params?: IParams): void;
-  /** CSI E */ cursorNextLine(params?: IParams): void;
-  /** CSI F */ cursorPrecedingLine(params?: IParams): void;
-  /** CSI G */ cursorCharAbsolute(params?: IParams): void;
-  /** CSI H */ cursorPosition(params?: IParams): void;
-  /** CSI I */ cursorForwardTab(params?: IParams): void;
-  /** CSI J */ eraseInDisplay(params?: IParams): void;
-  /** CSI K */ eraseInLine(params?: IParams): void;
-  /** CSI L */ insertLines(params?: IParams): void;
-  /** CSI M */ deleteLines(params?: IParams): void;
-  /** CSI P */ deleteChars(params?: IParams): void;
-  /** CSI S */ scrollUp(params?: IParams): void;
-  /** CSI T */ scrollDown(params?: IParams, collect?: string): void;
-  /** CSI X */ eraseChars(params?: IParams): void;
-  /** CSI Z */ cursorBackwardTab(params?: IParams): void;
-  /** CSI ` */ charPosAbsolute(params?: IParams): void;
-  /** CSI a */ hPositionRelative(params?: IParams): void;
-  /** CSI b */ repeatPrecedingCharacter(params?: IParams): void;
-  /** CSI c */ sendDeviceAttributes(params?: IParams, collect?: string): void;
-  /** CSI d */ linePosAbsolute(params?: IParams): void;
-  /** CSI e */ vPositionRelative(params?: IParams): void;
-  /** CSI f */ hVPosition(params?: IParams): void;
-  /** CSI g */ tabClear(params?: IParams): void;
-  /** CSI h */ setMode(params?: IParams, collect?: string): void;
-  /** CSI l */ resetMode(params?: IParams, collect?: string): void;
-  /** CSI m */ charAttributes(params?: IParams): void;
-  /** CSI n */ deviceStatus(params?: IParams, collect?: string): void;
-  /** CSI p */ softReset(params?: IParams, collect?: string): void;
-  /** CSI q */ setCursorStyle(params?: IParams, collect?: string): void;
-  /** CSI r */ setScrollRegion(params?: IParams, collect?: string): void;
-  /** CSI s */ saveCursor(params?: IParams): void;
-  /** CSI u */ restoreCursor(params?: IParams): void;
+  /** CSI @ */ insertChars(params: IParams): void;
+  /** CSI A */ cursorUp(params: IParams): void;
+  /** CSI B */ cursorDown(params: IParams): void;
+  /** CSI C */ cursorForward(params: IParams): void;
+  /** CSI D */ cursorBackward(params: IParams): void;
+  /** CSI E */ cursorNextLine(params: IParams): void;
+  /** CSI F */ cursorPrecedingLine(params: IParams): void;
+  /** CSI G */ cursorCharAbsolute(params: IParams): void;
+  /** CSI H */ cursorPosition(params: IParams): void;
+  /** CSI I */ cursorForwardTab(params: IParams): void;
+  /** CSI J */ eraseInDisplay(params: IParams): void;
+  /** CSI K */ eraseInLine(params: IParams): void;
+  /** CSI L */ insertLines(params: IParams): void;
+  /** CSI M */ deleteLines(params: IParams): void;
+  /** CSI P */ deleteChars(params: IParams): void;
+  /** CSI S */ scrollUp(params: IParams): void;
+  /** CSI T */ scrollDown(params: IParams, collect?: string): void;
+  /** CSI X */ eraseChars(params: IParams): void;
+  /** CSI Z */ cursorBackwardTab(params: IParams): void;
+  /** CSI ` */ charPosAbsolute(params: IParams): void;
+  /** CSI a */ hPositionRelative(params: IParams): void;
+  /** CSI b */ repeatPrecedingCharacter(params: IParams): void;
+  /** CSI c */ sendDeviceAttributes(params: IParams, collect?: string): void;
+  /** CSI d */ linePosAbsolute(params: IParams): void;
+  /** CSI e */ vPositionRelative(params: IParams): void;
+  /** CSI f */ hVPosition(params: IParams): void;
+  /** CSI g */ tabClear(params: IParams): void;
+  /** CSI h */ setMode(params: IParams, collect?: string): void;
+  /** CSI l */ resetMode(params: IParams, collect?: string): void;
+  /** CSI m */ charAttributes(params: IParams): void;
+  /** CSI n */ deviceStatus(params: IParams, collect?: string): void;
+  /** CSI p */ softReset(params: IParams, collect?: string): void;
+  /** CSI q */ setCursorStyle(params: IParams, collect?: string): void;
+  /** CSI r */ setScrollRegion(params: IParams, collect?: string): void;
+  /** CSI s */ saveCursor(params: IParams): void;
+  /** CSI u */ restoreCursor(params: IParams): void;
   /** OSC 0
       OSC 2 */ setTitle(data: string): void;
   /** ESC E */ nextLine(): void;