Appears On
A perpetual calendar covering 1801–2399 that highlights your chosen date in inverse video and uses a clever string-based data store to pack day and month names.
A self-running demo showcases an Extended BASIC cartridge's extra commands—DRAW, FILL, SCROLL, CIRCLE, and more—all driven by a clever machine-code interpreter hidden inside a single REM line.
A full referee program for a crossword game, encoding letter identities and point scores together in a single floating-point board array.
A ZX81 action game where a mad tank fires wildly in all directions — can you plant your five mines before time, bullets, or the tank itself finish you off?
A machine code helper that converts hex, decimal, and two-byte values using clever ZX81 system variable tricks — designed to drop straight into any project.
A full-featured RAM text editor built around a Z80 machine code payload hidden inside a single REM statement — with block-graphics title art and a live command reference screen.
Command the Enterprise across a 5×5 galaxy grid, hunting 15 Klingons with torpedoes, phasers, and impulse drive before time and energy run out.
A BASIC shell drives embedded machine code to sample spoken words, build voiceprints from eight repetitions, and recognise up to ten stored vocabulary entries.
A machine-code-assisted filing system lets you add, edit, search, and print multi-field records with configurable print formatting and numeric input validation.
