sputoppm
Convert Atari Spectrum 512 images to PPM
TLDR
Convert Atari Spectrum 512 to PPM
$ sputoppm [input.spu] > [output.ppm]
SYNOPSIS
sputoppm [file]
DESCRIPTION
sputoppm converts images in the Atari Spectrum 512 uncompressed format (SPU) to PPM (Portable Pixmap) format. The Spectrum 512 format was used on the Atari ST computer to display images with up to 512 simultaneous colors by cycling the palette on each scanline. This tool is part of the Netpbm image processing toolkit, which provides converters between many image formats.
INSTALL
sudo apt install netpbm
sudo dnf install netpbm
sudo pacman -S netpbm
sudo apk add netpbm
sudo zypper install netpbm
brew install netpbm
nix profile install nixpkgs#netpbm