1977 - photo dissolving into green phosphor ASCII characters

1977

Convert any image to Apple II text-mode ASCII art

A native macOS app that turns photos into authentic 40-column or 80-column Apple II ASCII art — rendered live on a green, amber, or white phosphor screen, ready to view on a real Apple II. Named for the year the Apple II shipped.

Free · macOS 14+ · SwiftUI

Features

📺

40 & 80 Column Modes

Standard 40-col or 80-col card output. Same 280×192 Apple II display, mapped per character cell.

🔤

Authentic Apple II Fonts

PrintChar21 for 40-col and PRNumber3 for 80-col, both bundled in the app. Pixel-perfect glyphs.

🟢

Phosphor Preview

Live preview in classic green (#33FF00), amber (#FFB000), or white — with subtle screen glow.

🎚️

Custom Character Ramps

Apple II Classic, Standard ASCII, Simple, or Dense — plus your own custom ramp text.

🖼️

Drag & Drop

Drop any PNG, JPEG, TIFF, GIF, BMP, or HEIC. Brightness, contrast, invert, and flip update live.

💾

Multiple Exports

Bootable ProDOS disk image (.po) with a STARTUP launcher, Apple II text (.txt with CR endings), Mac text (LF), or runnable Applesoft BASIC (.bas) program.

How It Works

1

Drop an image

Any common format works. The app aspect-fills the image into the Apple II's 280×192 display canvas.

2

Sample brightness

Each character cell’s region is downsampled and converted to perceptual luminance using the BT.709 coefficients.

3

Map to characters

The brightness value indexes into your chosen character ramp — dark to light — producing a grid of ASCII glyphs.

4

Export to Apple II

Save as plain text with CR line endings, or as an Applesoft BASIC program with auto-inserted PR# 3 for 80-col output.

Requirements

Support

App Store

Download 1977 on the Mac App Store.

Contact

Questions? Email walter.tengler@gmail.com

Fonts

Bundled Apple II fonts (PrintChar21, PRNumber3) are from Kreative Korporation.