BitPast
iOS app by Walter Tengler. Utilities · Walter Tengler
- Store rating
- 0 / 5
- Store rating count
- 0
- Download price
- 3.99 USD
- In-app purchases
- Unknown
- Version
- 4.3
- Listing last refreshed
- 2026-09-10
View the original store listing
Store description excerpt
Turn your modern photos into authentic retro computer graphics — just like they would have appeared on classic machines from the 1980s and 90s. BitPast accurately recreates the unique visual characteristics of 15 legendary computer systems, complete with their original color palettes, resolution limits, and display quirks. Whether you're a retro computing enthusiast, digital artist, or just feeling nostalgic, BitPast brings the magic of vintage computing to your Mac. SUPPORTED SYSTEMS • Apple II — Hi-Res with 6 colors, artifact colors • Apple IIgs — Super Hi-Res 320/640 modes, 3200-color Brooks format • Commodore 64 — Multi-color and Hi-Res modes, VIC-II palette • Commodore VIC-20 — Multi-color with characteristic palette • Commodore Plus/4 — TED chip's 121-color palette • Amiga 500 — OCS modes including HAM6 (4096 colors) • Amiga 1200 — AGA modes including HAM8 • Atari 800 — GTIA/ANTIC graphics modes • Atari ST — Low, medium, and high resolution • ZX Spectrum — Attribute-based graphics with color clash • Amstrad CPC — Mode 0, 1, and 2 with Gate Array palette • BBC Micro — Modes 0-5 with authentic palette • MSX — Screen modes with MSX1/MSX2 palettes • IBM PC — CGA and EGA graphics modes • TRS-80 Color Computer — PMODE graphics and CoCo 3 modes AUTHENTIC CONVERSION BitPast doesn't just resize and reduce colors. It applies the same constraints and techniques that developers used decades ago: • Accurate color palettes for each system • Proper resolution and aspect ratio handling • Multiple dithering algorithms (Floyd-Steinberg, Atkinson, Bayer, and more) • Attribute-based color handling where appropriate • Contrast and brightness preprocessing REAL DISK IMAGES Export your converted images directly to authentic disk image formats: • ProDOS (.po, .2mg, .hdv) for Apple II/IIgs • D64/D71/D81 for Commodore systems • ADF for Amiga • ATR for Atari 800 • ST for Atari ST • TRD/DSK for ZX Spectrum • DSK for Amstrad CPC and MSX • SSD/DSD for BBC Micro • IMG for PC • DSK for TRS-80 CoCo Load these disk images in emulators or transfer them to real vintage hardware! FEATURES • Batch conversion — process multiple images at once • Real-time preview — see results as you adjust settings • Native macOS app — fast, clean, and privacy-respecting • No subscription — buy once, own forever • Works offline — no internet required Perfect for: • Retro computing enthusiasts • Pixel artists and digital creators • Demoscene and chiptune communities • Educators teaching computing history • Anyone who loves the aesthetic of classic computers BitPast — Because pixels had more character back then.
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