Timex Sinclair Public Domain Library Tape 2001

Developer(s): Tony Willing
Date: 198x
Type: Cassette
Platform(s): TS 2068

The first in a numbered series of public domain library tapes compiled by Tony Willing, containing programs 20001 to 20050. Features over 40 programs spanning games, utilities, financial tools, and graphics demos.

Content

"BOLD" Character Subroutine

Program

A two-author machine code hack from 1985 that rewrites the system font in RAM to produce genuinely bold characters — toggled on or off at runtime with a single POKE.

21

Program

A Blackjack game with PLOT/DRAW card graphics and UDG suit symbols.

Auto Answer

Program

A hardware port-polling routine detects incoming telephone calls and waits for a persistent off-hook signal before triggering your own answer code.

BigStuff

Program

Load any screen image and watch this clever machine-code routine slice and enlarge it into an eight-strip, 21-by-25.5-inch poster — automatically printed in one run.

Bounce

Program

Enter a bounce count and watch a pixel ricochet across the full screen, with distinct beeps at each wall — stopping exactly when you say.

Breakout

Program

A Breakout-style demolition game that drops a ball through coloured brick rows, complete with splash damage, a high score, and direct font manipulation for the scoreboard.

Calendar

Program

A calendar generator using Zeller's congruence calculates the correct starting weekday for any month from 1752 onward, with clever PEEK tricks to manage column-based layout.

Cassette Directory

Program

A tape cataloguing utility that reads file headers directly from memory and logs type, name, size, and load address — all printable and saveable for later review.

Catalog

Program

A machine-code powered tape cataloger that reads headers from a running tape, identifies file types and names, and estimates their physical position automatically.

Characters

Program

Type any word up to 10 characters and watch it redrawn pixel-by-pixel as a magnified outline — a clever trick using POINT and DRAW.

Checkbook

Program

A practical checkbook reconciliation tool that tallies outstanding checks and deposits, then prints a full statement of account on paper alongside the screen output.

Clip Art

Program

A ten-image clip-art menu lets you PLOT, DRAW, and CIRCLE flowers, bees, valentines, and more — even layering multiple images on one screen.

Clock

Program

A self-advancing digital clock that chimes every quarter-hour with distinct melodies and renders digits by bit-reading the ROM font with PEEK.

Double Thick Characters

Program

A short machine-code routine transforms the built-in character ROM into a bold double-thickness font, then saves the 768-byte result to tape for use in your own programs.

Factorise

Program

A clever wheel-factorisation algorithm tackles numbers up to 4 billion, working around floating-point limitations with a custom large-number printer.

FadeOut

Program

A self-relocating machine code routine POKEs itself into RAM, fills the screen with text, then fades the entire display to black in a smooth animated effect.

figForth v1.0

Program

A complete fig-FORTH built specifically for the TS2068 — bank switching, Timex printer, extended memory and all — and released into the public domain.

GraphicDemo

Program

A mesmerising shrinking geometric pattern built from just four DRAW commands, cycling through two ink colours as it spirals inward iteration by iteration.

Header

Program

A machine code–assisted tool that intercepts and decodes tape header blocks, revealing file type, filename, length, and start address for any loaded tape.

Hydrology

Program

A menu-driven hydrology suite that calculates watershed slopes, draws drainage maps, prepares unit hydrographs, and fits lognormal distributions — all with embedded machine code.

Hydrology 2

Program

A three-module hydrology toolkit that computes rainfall distribution, unit hydrograph convolution, and reservoir storage-routing functions — all driven from a single numeric menu.

Impossible Triangle

Program

This drawing program builds a famous geometric paradox on screen step by step, complete with randomized sound effects, before revealing its impossible identity.

KeyScan

Program

A tiny 25-byte machine code routine slots itself just above RAMTOP and returns real-time two-key keyboard state — callable from BASIC with a single USR expression.

Linear Optimization By Simplex Method

Program

A full Simplex Method solver that handles mixed constraints, artificial variables, and Big-M penalties — printing the complete tableau at every iteration until the optimal solution is found.

Machine Code Monitor

Program

A full machine code monitor lets you examine, edit, enter, save, and run memory—complete with hex/decimal toggle and Z80 scroll routines POKEd in at startup.

Memscan

Program

A compact 34-byte machine code routine scans your system's memory map and reports what's installed — all launched from a tiny BASIC loader.

Modem

Program

A pulse-dialer and auto-launcher that drives a phone line through the expansion port, detects a carrier, then hands off to a machine-code terminal — all in BASIC.

Moving Averages

Program

A time-series moving-averages program that handles even and odd periods, computes centred averages, and lets you chain multiple smoothing passes interactively.

Net Present Value

Program

A financial analysis tool that computes Net Present Value and Internal Rate of Return for multi-period investments, complete with iterative IRR search and sensitivity analysis.

NPolygons

Program

Enter any number from 3 to 30 and watch every vertex pair of a regular polygon get connected, revealing intricate geometric star patterns built from pure BASIC trigonometry.

OverDemo

Program

Enter a line count and toggle OVER mode to draw radial spoke patterns that can either build up or cancel themselves out on screen.

OverDemo2

Program

A mesmerizing random-line drawing program that pairs every stroke with a pitch-varying beep, using XOR pixel mode for an ever-shifting interference pattern.

PSG Register

Program

An interactive PSG register editor that reads, displays, and writes all 15 sound chip registers live — showing binary and decimal values simultaneously.

Renumber

Program

A Z80 machine code renumbering utility packed into 48 hex DATA strings rewrites every GO TO, GO SUB, and RESTORE reference throughout your BASIC program automatically.

Risk

Program

A compact flood-risk calculator uses a classic probability formula to determine how likely a once-in-a-century event is to strike within any chosen time window.

Screen Layout Examination

Program

Enter any byte value and watch it fill every pixel and every colour cell on screen — a hands-on tool for understanding display memory layout.

Setype

Program

This clever font utility installs 80 bytes of machine code to let any BASIC program switch between Regular, Bold, Modern, and Italic type styles with a single GOSUB call.

Shooting Tiles

Program

A clever pixel-scanning routine reads a text banner and "shoots" each lit pixel down the screen with sound effects, creating a unique animated title display.

Spiral

Program

A pure-BASIC geometric spiral built from trigonometric rotation and scaling draws an intricate hexagonal pattern — ported from Apple II code published in Creative Computing, February 1984.

Square Wave Graph

Program

A sine wave clipped into a square wave is graphed live on-screen, complete with labelled voltage axis and real-time readouts updating with every plotted point.

Tank

Program

Enter an elevation angle and watch your shell arc across the battlefield — but can you calculate the range before your target escapes?

Tape to Tape Backup

Program

A clever 20-byte machine code routine turns the computer into a live tape signal relay, letting you duplicate cassettes with just two recorders.

Time Series Analysis: Exponential Smoothing

Program

A time-series forecasting tool that automatically finds the best exponential smoothing constant by comparing eleven alpha values against your observed data.

Tiny Turtle

Program

Draw spirals, polygons, and abstract patterns with this turtle-graphics engine driven entirely by angle, step length, and an optional growth increment.

Triangle To Square

Program

Watch a triangle smoothly morph into a square across 20 interpolated frames, driven by a machine code dual-screen buffer that eliminates flicker entirely.

Typewriter

Program

A complete BASIC word processor with word-wrap, tab stops, insert/delete, and cassette save/load — all packed into a single string-array document buffer.

Typewriter 64

Program

A public-domain, tape-saveable word processor with word-wrap, tab stops, 64-column display support, and a two-level command system crammed into pure BASIC.

Xmas Card

Program

A flashing Christmas card draws a PLOT/DRAW tree, scatters UDG baubles, then loops through three carol melodies with randomised ornament colours each time.

Note: Type-in program listings on this website use ZMAKEBAS notation for graphics characters.

Tags

Archived Media Downloadable TS 2068 Collection