diff --git a/presets/apple2/dos33bin.a b/presets/apple2/dos33bin.a
new file mode 100644
index 00000000..5554b998
--- /dev/null
+++ b/presets/apple2/dos33bin.a
@@ -0,0 +1,112 @@
+; --------------------------------------------------
+; Example showing how to create a DOS 3.3 binary
+; header and program that is automatically loaded
+; into the desired ORIGIN memory address.
+; --------------------------------------------------
+
+        processor 6502
+
+; --------------------------------------------------
+; Desired origin
+; - Origin must be less than $C000
+; - Origin + size must be less than $13000
+; - Origin must be $0803 or aligned to $xx00
+; --------------------------------------------------
+ORIGIN  equ     $2000
+SIZE    equ     END_OF_PRORGAM-ORIGIN
+
+; --------------------------------------------------
+; DOS 3.3 binary header (4 bytes)
+; --------------------------------------------------
+        org ORIGIN - 4 ; Subtract 4 ensures correct memory locations
+        word ORIGIN    ; Origin (2 bytes)
+        word SIZE      ; Size (2 bytes), must be length - 4
+
+; --------------------------------------------------
+; ROM routines
+; --------------------------------------------------
+HOME    equ $FC58
+
+; --------------------------------------------------
+; Origin and start of program
+; --------------------------------------------------
+        org ORIGIN     ; Starting address
+
+
+start
+        ; --------------------------------------------------
+        ; Clear screen
+        ; --------------------------------------------------
+        jsr HOME
+
+        ; --------------------------------------------------
+        ; Print "START $" (7 chars) to $0400..$0406
+        ; --------------------------------------------------
+        ldx #0
+pfx_loop
+        lda prefix,x
+        ora #$80
+        sta $0400,x
+        inx
+        cpx #7
+        bne pfx_loop
+
+
+        ; --------------------------------------------------
+        ; Print origin in hex to $0407 - $040A
+        ; --------------------------------------------------
+
+        ; High byte high nibble
+        lda #>start
+        lsr
+        lsr
+        lsr
+        lsr
+        tax
+        lda hexchar,x
+        ora #$80
+        sta $0407
+
+        ; High byte low nibble
+        lda #>start
+        and #$0F
+        tax
+        lda hexchar,x
+        ora #$80
+        sta $0408
+
+        ; Low byte high nibble
+        lda #<start
+        lsr
+        lsr
+        lsr
+        lsr
+        tax
+        lda hexchar,x
+        ora #$80
+        sta $0409
+
+        ; Low byte low nibble
+        lda #<start
+        and #$0F
+        tax
+        lda hexchar,x
+        ora #$80
+        sta $040A
+
+        ; --------------------------------------------------
+        ; Endless loop (text stays on screen)
+        ; --------------------------------------------------
+done    jmp done
+
+
+; --------------------------------------------------
+; Data
+; --------------------------------------------------
+prefix
+        byte "START $"
+
+hexchar
+        byte "0123456789ABCDEF"
+
+END_OF_PRORGAM ; Don't add instructions after this line
diff --git a/src/platform/apple2.ts b/src/platform/apple2.ts
index 70e02c05..74af678f 100644
--- a/src/platform/apple2.ts
+++ b/src/platform/apple2.ts
@@ -6,52 +6,53 @@ import { Base6502MachinePlatform } from "../common/baseplatform";
 import { CodeAnalyzer_apple2 } from "../common/analysis";
 import { BaseMAME6502Platform } from "../common/mameplatform";
 
-const APPLE2_PRESETS : Preset[] = [
-  {id:'sieve.c', name:'Sieve', category:"C"},
-  {id:'keyboardtest.c', name:'Keyboard Test'},
-  {id:'mandel.c', name:'Mandelbrot'},
-  {id:'tgidemo.c', name:'TGI Graphics Demo'},
-  {id:'Eliza.c', name:'Eliza'},
-  {id:'siegegame.c', name:'Siege Game'},
-  {id:'cosmic.c', name:'Cosmic Impalas'},
-  {id:'farmhouse.c', name:"Farmhouse Adventure"},
-  {id:'yum.c', name:"Yum Dice Game"},
-  {id:'lz4test.c', name:"LZ4 Decompressor"},
-  {id:'hgrtest.a', name:"HGR Test", category:"Assembly Language"},
-  {id:'conway.a', name:"Conway's Game of Life"},
-  {id:'lz4fh.a', name:"LZ4FH Decompressor"},
-  {id:'deltamod.dasm', name:"Delta Modulation Audio"},
-//  {id:'zap.dasm', name:"ZAP!"},
-//  {id:'tb_6502.s', name:'Tom Bombem (assembler game)'},
+const APPLE2_PRESETS: Preset[] = [
+  { id: 'sieve.c', name: 'Sieve', category: "C" },
+  { id: 'keyboardtest.c', name: 'Keyboard Test' },
+  { id: 'mandel.c', name: 'Mandelbrot' },
+  { id: 'tgidemo.c', name: 'TGI Graphics Demo' },
+  { id: 'Eliza.c', name: 'Eliza' },
+  { id: 'siegegame.c', name: 'Siege Game' },
+  { id: 'cosmic.c', name: 'Cosmic Impalas' },
+  { id: 'farmhouse.c', name: "Farmhouse Adventure" },
+  { id: 'yum.c', name: "Yum Dice Game" },
+  { id: 'lz4test.c', name: "LZ4 Decompressor" },
+  { id: 'hgrtest.a', name: "HGR Test", category: "Assembly Language" },
+  { id: 'conway.a', name: "Conway's Game of Life" },
+  { id: 'lz4fh.a', name: "LZ4FH Decompressor" },
+  { id: 'deltamod.dasm', name: "Delta Modulation Audio" },
+  //  {id:'zap.dasm', name:"ZAP!"},
+  //  {id:'tb_6502.s', name:'Tom Bombem (assembler game)'},
+  { id: 'dos33bin.a', name: "DOS 3.3 Binary" },
 ];
 
 /// MAME support
 
 class Apple2MAMEPlatform extends BaseMAME6502Platform implements Platform {
 
-  start () {
+  start() {
     this.startModule(this.mainElement, {
-      jsfile:'mame8bitpc.js',
-      biosfile:['apple2e.zip'],
+      jsfile: 'mame8bitpc.js',
+      biosfile: ['apple2e.zip'],
       //cfgfile:'nes.cfg',
-      driver:'apple2e',
-      width:280*2,
-      height:192*2,
+      driver: 'apple2e',
+      width: 280 * 2,
+      height: 192 * 2,
       //romfn:'/emulator/cart.nes',
       //romsize:romSize,
       //romdata:new lzgmini().decode(lzgRom).slice(0, romSize),
-      preInit:function(_self) {
+      preInit: function (_self) {
       },
     });
   }
 
   getOpcodeMetadata = getOpcodeMetadata_6502;
-  getDefaultExtension () { return ".c"; };
+  getDefaultExtension() { return ".c"; };
   getToolForFilename = getToolForFilename_6502;
 
-  getPresets () { return APPLE2_PRESETS; }
+  getPresets() { return APPLE2_PRESETS; }
 
-  loadROM (title, data) {
+  loadROM(title, data) {
     this.loadROMFile(data);
     // TODO
   }
@@ -61,29 +62,33 @@ class Apple2MAMEPlatform extends BaseMAME6502Platform implements Platform {
 
 class NewApple2Platform extends Base6502MachinePlatform<AppleII> implements Platform {
 
-  newMachine()          { return new AppleII(); }
-  getPresets()          { return APPLE2_PRESETS; }
+  newMachine() { return new AppleII(); }
+  getPresets() { return APPLE2_PRESETS; }
   getDefaultExtension() { return ".c"; };
-  readAddress(a)        { return this.machine.readConst(a); }
+  readAddress(a) { return this.machine.readConst(a); }
   // TODO loadBIOS(bios)	{ this.machine.loadBIOS(a); }
-  getMemoryMap = function() { return { main:[
-      {name:'Zero Page RAM',start:0x0,size:0x100,type:'ram'},
-      {name:'Line Input RAM',start:0x200,size:0x100,type:'ram'},
-      {name:'RAM',start:0x300,size:0xc0,type:'ram'},
-      {name:'DOS Vectors',start:0x3c0,size:0x40,type:'ram'},
-      {name:'Text/Lores Page 1',start:0x400,size:0x400,type:'ram'},
-      {name:'RAM',start:0x800,size:0x1800,type:'ram'},
-      {name:'Hires Page 1',start:0x2000,size:0x2000,type:'ram'},
-      {name:'Hires Page 2',start:0x4000,size:0x2000,type:'ram'},
-      {name:'RAM',start:0x6000,size:0x6000,type:'ram'},
-      {name:'I/O',start:0xc000,size:0x1000,type:'io'},
-      {name:'ROM',start:0xd000,size:0x3000,type:'rom'},
-  ] } };
-  getROMExtension(rom:Uint8Array) {
-    if (rom && rom.length == 35*16*256) return ".dsk"; // DSK image
+  getMemoryMap = function () {
+    return {
+      main: [
+        { name: 'Zero Page RAM', start: 0x0, size: 0x100, type: 'ram' },
+        { name: 'Line Input RAM', start: 0x200, size: 0x100, type: 'ram' },
+        { name: 'RAM', start: 0x300, size: 0xc0, type: 'ram' },
+        { name: 'DOS Vectors', start: 0x3c0, size: 0x40, type: 'ram' },
+        { name: 'Text/Lores Page 1', start: 0x400, size: 0x400, type: 'ram' },
+        { name: 'RAM', start: 0x800, size: 0x1800, type: 'ram' },
+        { name: 'Hires Page 1', start: 0x2000, size: 0x2000, type: 'ram' },
+        { name: 'Hires Page 2', start: 0x4000, size: 0x2000, type: 'ram' },
+        { name: 'RAM', start: 0x6000, size: 0x6000, type: 'ram' },
+        { name: 'I/O', start: 0xc000, size: 0x1000, type: 'io' },
+        { name: 'ROM', start: 0xd000, size: 0x3000, type: 'rom' },
+      ]
+    }
+  };
+  getROMExtension(rom: Uint8Array) {
+    if (rom && rom.length == 35 * 16 * 256) return ".dsk"; // DSK image
     return ".bin";
   };
-  getToolForFilename = (fn:string) : string => {
+  getToolForFilename = (fn: string): string => {
     if (fn.endsWith(".lnk")) return "merlin32";
     else return getToolForFilename_6502(fn);
   }