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PERSONAL
FILE COPY
THE EDITOR’S DESKNOVEMBER 1986MEET THE AUTHOR

Walter
Tengler

Born 1971. A home-built Apple II, BASIC all night, an assembler book at the lake, and an Apple IIgs bought with saved-up money.

The gift

In the 1980s an Apple employee gave me an Apple II that he had built himself from parts. I learned BASIC on it and programmed all night.

The IIgs

When the Apple IIgs came out, I bought one with my own savings. That must have been around 1986.

Pascal, and assembler at the lake

Pascal followed BASIC. I learned assembler from a book that I had with me when I was a lifeguard with the Wasserwacht, the German water rescue service: on weekends I lay by the lake and saved people.

Real life, and the way back

Then came the serious side of life, and there was no time left for computers. Now I am 55, and I have rediscovered my love for the Apple IIgs.

Today I write apps for the Mac and iOS, and programs, games and demos for the Apple IIgs in 65816 assembly.

I have rediscovered my love for the Apple IIgs.

All my software

Everything I have made so far, sorted the way it stands on the start page. Mac and iOS apps, Apple IIgs programs, and a few for Portugal and Europe.

Mac Utilities & Creative

Screen2StoreDesign beautiful App Store & Play Store screenshots in minutes — every size, every language Retro TVA century of television, on your Mac — play any video through six TVs from 1928 to 2024 Retro TubeWatch any video through 1980s computer graphics — Apple II, C64, Game Boy, NES, MSX and more Retro Graphics ConverterConvert & view vintage computer graphics from Apple II, C64, Amiga, Atari, and more BitPastTransform modern images into authentic retro graphics for 18 classic computer systems GS RemapConvert pictures to and from Apple IIgs Super Hi-Res, with the look of the IIgs desktop 1977Convert any image into Apple II ASCII art with live phosphor-screen preview — open source RetroBrowseA modern dual-pane file manager for Apple II disk images — ProDOS, DOS 3.3, ShrinkIt and more CyanHeroDigital negatives for cyanotype and alternative process UV art printing AichiveReclaim the disk space your AI tools forgot to clean up FCPX CleanReclaim the space Final Cut Pro forgot — safely and selectively EasyDupFind and remove duplicate files from your Mac with ease ExifEasyView and edit photo metadata and EXIF data directly on macOS File VortexSmart file organizer that automatically sorts your Mac's chaos SlimPixSmart image compression for Mac — smaller files, same quality Cores do AmorExtract beautiful color palettes from any image on macOS ScanoraSmart food scanner — scan barcodes and know what you eat AdSense MonitorTrack your ad revenue from mobile apps in real time Wally’s ManagerEvery app you ship in one retro desktop — versions, review status and Apple IIgs disks, in thirteen classic skins

Apple IIgs

MegaconvertGSAn image converter that runs on the Apple IIgs itself — over 60 retro and modern formats to Super Hi-Res Conquer GSReal-time strategy for the Apple IIgs — build a base, harvest ore, conquer the enemy GS CommanderA Norton Commander style file manager for the Apple IIgs — two panes, archives and disk images, previews of pictures, sounds and documents EmuBuddyAn Apple IIgs emulator for the Mac — PDF printing, drag and drop into the Finder, disk browser and a full command line TileTownA city builder for the Apple IIgs — roads, power, zones, taxes, and disasters from fires to meltdowns TileTown 2The isometric sequel for an Apple IIgs with 8 MB and an accelerator — buildings stand up from the map, in four designs each. Coming soon GSLauncherA program launcher for the Apple IIgs — your applications as Finder icons in one window, found for you and kept in pages Conquer 3: SandstormReal-time strategy for the Apple IIgs — three armies, each with its own units and buildings, fight over the desert. In development HyperhaulSpace trading and combat for the Apple IIgs — eight galaxies, filled 3D ships in real time, pirates, police and two missions. In development Grand Theft AppleA top-down crime game for the Apple IIgs — steal cars, run from the police and take jobs from the payphones of Solana Bay. In development Terra IncognitaExploration and trade for the Apple IIgs — sail west in 1495, chart a new world under the fog, trade with its peoples and find the golden cities. In development GAIVOTAA helicopter rescue game for the Apple IIgs — six missions over a map of mainland Portugal built from OpenStreetMap, in filled 3D. In development IIgs DemosDemos for the Apple IIgs — animations and demo-scene effects in Super Hi-Res, with disk images to download

Portugal

AlertaCivil protection incidents across Portugal, updated in real time BombaReal-time fuel prices at every petrol station in Portugal Comboio TreckLive train tracking for Portugal's entire rail network Clima VivaReal-time climate data across Portugal, beautifully visualized FluvioReal-time flood monitoring and river level tracking in Portugal Fugiu!The essential fishing guide for Portuguese fishermen PIBUPBuilding boundaries and property limits on an interactive map Certificado EnergéticoCalculate your home's energy efficiency class in Portugal SOS IbéricaEmergency services and public contacts for Portugal and Spain

Europe & Global

Fire — EU FiresReal-time wildfire tracking across Europe, powered by NASA FIRMS satellite data EU Energy MonitorReal-time European energy market data and power generation at a glance TerramotoEarthquake & tsunami physics simulation and live seismic tracking AbasteceReal-time fuel prices at every station in Chile, Brazil and Argentina Missile TagLaunch virtual missiles at your friends' real locations — run or shield up before it lands

Utilities & Planning

SobriumLock the apps you'd regret using when drinking — pass a quick sobriety test to unlock Emergency ReminderPlan and manage your emergency supply kit — be prepared when it matters

Games

FlipsideA tap-to-clear puzzle where you flip gravity — plan the fall, chain the gems

Also: IIgs Demos · Retro computing: 1977 · GitHub · The start page

© 2026 Walter TenglerThe Sixteen-Bit Gazette · November 1986