What is "tommygun"

TommyGun is a retro development toolkit. It is an integrated development environment (IDE) made for creating games and other software for old 8-bit computers. Because it is a modular and open-ended application it can support any type of computer, but is intended for 8 and 16 bit computers. It has built-in editors for graphics, tile maps and code, although as of writing it is limited to using assembler. The machines supported are

• ZX Spectrum 16K, 48K, +, 128K, +2, +2e, +3.
• Amstrad CPC 464, 664 and 6128
• Sam Coupé
• Commodore 64 (hi-res mode only)
• Vic-20 (Hi-res and Multi-colour)
• Jupiter Ace (limited support for 64x48 mode)
• Jupiter Ace 4000 (full support for 256x192 mode graphics)