4 layers97.3 × 69.6 mmAtariHDisk4smonson78/smonson-diskSD card to ACSI hard drive interface77 parts5GPL-3.0
2 layers85.1 × 60.2 mm256KROMsmonson78/atari-st-256k-rom256K ROM mod for Atari ST and H4 Mongrel11 parts