Appears On
A full Z80 disassembler and machine code monitor that decodes every opcode prefix, supports symbol tables loaded from tape, and outputs to screen or printer.
Draw freehand curves in 3D space with six-direction keyboard control, then replay or randomize your sketches with a perspective projection engine built entirely in BASIC.
A handy on-screen reference table renders all 64 paper and ink color combinations, showing their attribute byte values styled in the actual colors they represent.
A board game where you and the computer trade diagonal captures on a block-graphic grid — enter coordinates to move, and race to six captures first.
A full choral arrangement of "Ode to Joy" plays syllable by syllable, with melody, named chord accompaniment, and pitch-proportional lyric positioning all driven from a single DATA loop.
Demonstrates the use of binary numbers and calculates them from other number systems.
Enter your birthday and a target month to watch three sinusoidal biorhythm curves — Physical, Sensitivity, and Intellectual — plotted live across the screen.
Enter an activity number and exercise duration to instantly calculate calories burned and the equivalent weight loss in both kilograms and pounds.
Generates inserts for plastic cassette boxes.
A chord library that wraps plain BEEP melodies in full three-voice triads using raw sound-chip register values — transcribe sheet music with harmony in minutes.
Draw complete electronic circuit diagrams interactively, placing resistors, capacitors, transistors, diodes, and more using simple single-key commands.
A 2068 version archival copying utility.
A three-channel chip music rendition of "Endless Love" plays syllable by syllable, each word paired with chord voicings and precise beat durations stored in DATA statements.
A four-song Latin music medley — Granada, Perfidia, Brazil, and Solamente Una Vez — plays melody and live chord accompaniment simultaneously from a menu-driven BASIC program.
A BASIC rendition of "Evergreen" that synchronizes scrolling lyrics with melody and live three-voice chord accompaniment using AY sound chip register programming.
A complete menu-driven database system lets you design custom record layouts, sort, search, edit, and archive data to tape using embedded machine code routines.
Sophisticated data base program, based on the original MULTIFILE written for the ZX81.
A tape-based mail-merge utility uses an embedded machine code block-copy routine to assemble personalized letters from a template and data file.
A three-mode mortgage calculator that computes monthly payments, maximum home prices, and affordability checks from income — all built around shared BASIC subroutines.
A tape cataloging utility that POKEs machine code to read raw cassette headers and stores up to 400 program entries across searchable arrays.
Guide your craft through a torrential rainfall, dropping bombs and dodging collisions in this arcade game that uses custom graphics and display-file collision detection.
A utility demonstrating a number of different effects made possible by the SOUND command.
Blast scrolling star fields with a custom-drawn cannon in this joystick-controlled space shooter that gets faster and more crowded with every wave.
Peek inside the streams and channels tables live in RAM — this diagnostic tool decodes every address, routine pointer, and device specifier byte on screen.
A fully data-driven BASIC program plays "The Rose" note by note, synchronizing split syllable lyrics with three-voice harmony chords from the AY sound chip.
A 173-byte machine code utility reveals every BASIC variable currently in memory — just call it with RANDOMIZE USR to inspect your program's state.
A precision UTC digital clock that encodes the current time directly in BASIC loop counters, using block-graphic digits and carefully tuned BEEP durations to keep accurate time.
