Appears On
Type any short phrase and watch it bounce across the screen paired with its inverse-video twin in an endless, scrolling light show.
Guide your bucket across the screen to catch 30 falling drips in this real-time arcade game that uses custom-defined UDG sprites for every on-screen character.
A tape label maker that centers text, supports decorative cut-out titles, drives printer escape codes directly, and manages a companion machine code block via tape.
A three-voice composition editor lets you enter, edit, and play back music note-by-note, storing pitch data as raw sound-chip register values in string arrays.
Walk through every line of a 1986 Form 1040 with this interactive BASIC program that calculates your tax liability and prints a fully formatted return summary.
A three-year income tax estimator covering 1987–1989 that handles all four filing statuses, Social Security taxation, IRA deductions, and itemized versus standard deductions.
Redirect the font pointer to a RAM copy of the character set, unlocking fully editable custom character shapes across all 96 printable characters.
A nine-module personal finance toolkit covering loans, annuities, bonds, life insurance estimates, a calendar, and a utility bill analyzer — all with optional printer output.
A full-featured financial calculator solving investments, loans, and cash flows — enter "X" for any unknown and let the program find it automatically.
A two-entity grid game with UDG sprites, SCREEN$-based collision detection, and a high-score name entry system packed into tight BASIC code.
A joystick-driven drawing toy that trails randomly colored symbols across the screen, with a fire button that switches the brush character on the fly.
Dodge two independently scrolling obstacle rows using five custom sprites and a lives system — all packed into a tight BASIC movement and collision loop.
A machine code keyboard utility that lets you type BASIC keywords as plain text gets a slick animated loader with tape and disk backup support.
Navigate a multi-story building, dodge patrolling gorillas, and defeat the giant ape in this attribute-collision arcade game with a custom character set and frame-counter timer.
Load multiple full screens into memory and play them back as a slideshow, driven by a compact Z80 machine code routine installed at runtime.
Watch every printable character from the ROM font rendered as a giant 8×8 pixel grid, one at a time, with clever bit-extraction arithmetic.
Draw joystick-controlled pixel art frame by frame, saving each one as raw memory code — this animation tool even embeds its own machine code bootstrap.
Manage a week-long lemonade stand, balancing weather, pricing, and random vandal attacks in this economics simulation with animated block-graphic shopfront.
A full Conway's Life implementation with a cursor-driven cell editor and machine-code evolution engine, loaded from tape and driven by a BASIC menu shell.
Watch continuously morphing Lissajous curves drawn in real time using parametric sine and cosine equations with an ever-shifting frequency ratio.
Guide a crippled survival capsule to a safe lunar touchdown while your engines randomly deteriorate — every second counts in this physics-based lander game.
A menu-driven magazine article database packs up to 500 records into a string array, with subject search, bubble sort printing, and a character-by-character record editor.
Enter a starting number and a step value to instantly generate and print an arithmetic magic square where every row, column, and diagonal shares the same sum.
Print giant magnified banner text in four typographic styles using pixel-level font reading, machine code type rendering, and user-selectable fill characters.
Type two lines of text and watch each character balloon into a bold block-graphic display — with printer output — using a clever pixel-reading trick.
Blow up any text to giant banner size by pixel-sampling each character and reprinting it with your choice of block-graphic fill characters — on screen and printer simultaneously.
Design custom graphic characters pixel by pixel on an 8×8 grid, then compile, save, load, and edit them with this interactive UDG generator tool.
Run a radio factory through weekly crises — union strikes, flood damage, and supplier hikes — balancing wages, workforce, and pricing to avoid bankruptcy.
A walking stick-figure animation that pushes the UDG system to 80 characters by swapping multiple graphics tables on the fly using direct memory POKEs.
Guide your lunar lander across five hand-crafted moonscapes, juggling thrust, rotation, and fuel while dodging meteors and sticking every landing pad.
Flip your entire character set upside-down, load hand-crafted letter shapes, or restore the ROM font — all by jumping to a single line number.
Four machine code utilities — auto line numbering, a step tracer, a custom function key, and user-defined keys — packed into a single BASIC loader using IM2 interrupts.
Guide a rescue boat across the screen to catch people leaping from a burning building in this action game with UDG sprites and a detailed block-graphic backdrop.
