Timex Sinclair Public Domain Library Tape 2001

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

The first of Tony Willing’s numbered Timex Sinclair Public Domain Library tapes, holding programs numbered from 20001. Its 49 programs range from games and Christmas cards to graphics demos, character-set and tape utilities, a machine code monitor, a renumber, two word processors, fig-FORTH, financial and statistical tools, and engineering programs for hydrology and linear optimisation.

The download has a TAP and a text listing of each program, under its library name, and a directory file that lists them with credits and dates. The list below follows that directory.

Programs on the Tape

  • 21: a Blackjack game with PLOT/DRAW card graphics and UDG suit symbols (also #56278 21)
  • AutoAnswer: polls a port to detect an incoming telephone call and waits for a steady off-hook signal before running your own answering code (Randy Kuhn) (also #56279 Auto Answer)
  • BigStuff: machine code that enlarges a screen into an eight-strip poster printed in one run (Jack Keene) (also #56280 BigStuff)
  • BoldSub: rewrites the character set in RAM as bold characters, switched on and off with a POKE (Frank Bouldin and Ben Jackson) (also #56281 “BOLD” Character Subroutine)
  • Bounce: a dot bounces round the screen, beeping at each wall, for the number of bounces you enter (also #56282 Bounce)
  • Breakout: a Breakout-style game with coloured brick rows and a high score (also #56283 Breakout)
  • Calendar: prints a calendar for any month from 1752 on, using Zeller’s congruence for the starting weekday (also #56284 Calendar)
  • CassDir: catalogues a tape by reading its headers and logs type, name, length and address, ready to print or save (Michael Carver) (also #56285 Cassette Directory)
  • Catalog: a machine-code tape cataloguer that reads headers as the tape plays and estimates where each file sits (also #56286 Catalog)
  • Characters: redraws a word of up to ten letters as a large outline, using POINT and DRAW (Jasper Visser) (also #56287 Characters)
  • Checkbook: reconciles a checkbook against outstanding checks and deposits and prints a statement (also #56288 Checkbook)
  • Clip Art: a menu of ten PLOT/DRAW/CIRCLE pictures (flowers, a bee, a valentine and others) that can be layered on one screen (also #56289 Clip Art)
  • Clock: a digital clock with large digits read from the ROM font and quarter-hour chimes (also #56290 Clock)
  • DblThickChar: machine code that makes a double-thickness copy of the character set and saves the 768 bytes to tape (Ben Stagnell) (also #56291 Double Thick Characters)
  • ExpSmooth: time-series forecasting by exponential smoothing; tries eleven smoothing constants and picks the best (also #56292 Time Series Analysis: Exponential Smoothing)
  • Factorise: factorises numbers up to about four billion, with its own routine for printing large numbers (W. E. Thomson) (also #56293 Factorise)
  • FadeOut: machine code that fades the whole screen to black (M. Waters) (also #56294 FadeOut)
  • GraphicDemo: a shrinking geometric pattern drawn with four DRAW commands in two colours (John Copps) (also #56295 GraphicDemo)
  • Header: reads tape headers and shows file type, name, length and start address (also #56296 Header)
  • Hydrology: a menu of hydrology calculations: watershed slopes, drainage maps, unit hydrographs and lognormal fitting (also #56297 Hydrology)
  • Hydrology2: three more hydrology modules: rainfall distribution, unit-hydrograph convolution and reservoir routing (also #56298 Hydrology 2)
  • ImpossibleTriangle: draws the “impossible triangle” step by step with sound effects (Frank Bouldin) (also #56299 Impossible Triangle)
  • Italics: a 42-byte machine code routine copies the ROM character set to 30208 and slants it into italics by shifting the top rows of each character to the right, then saves the 768-byte set to tape; the REMs credit Ben Stagnell and ZX Computing Monthly
  • KeyScan: a 25-byte machine code routine above RAMTOP that reads two keys at once, called with USR (also #56301 KeyScan)
  • LinOptSi: linear optimisation by the Simplex method, printing the tableau at each step (also #56302 Linear Optimization By Simplex Method)
  • MachineCodeMonitor: a monitor to examine, edit, enter, save and run machine code, in hex or decimal (also #56303 Machine Code Monitor)
  • Memscan: a 34-byte machine code routine that reports what is in the memory map (Russell English) (also #56304 Memscan)
  • Modem: dials a telephone number by pulsing the line through the expansion port, waits for carrier and starts a machine-code terminal (also #56305 Modem)
  • MovingAverages: moving averages of a time series, with centred averages for even periods and repeated smoothing (also #56306 Moving Averages)
  • NPolygons: joins every pair of vertices of a regular polygon of 3 to 30 sides (Frank Bouldin) (also #56307 NPolygons)
  • NetPresVal: net present value and internal rate of return for multi-period investments (also #56308 Net Present Value)
  • OverDemo: draws radial spokes with OVER on or off, so the lines either build up or cancel out (also #56309 OverDemo)
  • OverDemo2: random lines drawn with OVER 1, each with a beep of varying pitch (also #56310 OverDemo2)
  • PSG Register: reads and writes all the sound chip registers, showing each in binary and decimal (also #56311 PSG Register)
  • Renumber: a machine code renumber held in 48 hex DATA strings that also fixes GO TO, GO SUB and RESTORE references (Charles Stelding) (also #56313 Renumber)
  • Risk: the probability that a once-in-N-years event happens within a chosen period (also #56314 Risk)
  • ScreenLayout: fills the display file and the attributes with a byte you enter, to show how screen memory is laid out (also #56315 Screen Layout Examination)
  • Setype: installs 80 bytes of machine code that switches between regular, bold, modern and italic type from BASIC (Ron Ruegg) (also #55070 Setype)
  • ShootingTiles: reads a text banner pixel by pixel and “shoots” each lit pixel down the screen with sound (Eddie Duncan-Dunlop) (also #56317 Shooting Tiles)
  • Spiral: a hexagonal spiral drawn by rotation and scaling, converted from an Apple II program in Creative Computing (Joe Jenkins) (also #56318 Spiral)
  • SquareWaveGraph: graphs a sine wave clipped into a square wave, with a labelled axis and live readouts (also #56319 Square Wave Graph)
  • Tank: enter an elevation angle and fire a shell at a target (also #56320 Tank)
  • Tape2Tape: a 20-byte machine code routine passes the tape signal from EAR to MIC to copy between two recorders (Larry Kenny) (also #56321 Tape to Tape Backup)
  • TinyTurtle: turtle graphics driven by angle, step length and an optional increment (Tim Hartnell) (also #56322 Tiny Turtle)
  • Triangle2Square: morphs a triangle into a square over 20 frames, using machine code to swap screen buffers (John Bell) (also #56323 Triangle To Square)
  • Typewriter: a BASIC word processor with word wrap, tab stops, insert and delete, and tape save and load (Jack Dohany) (also #56324 Typewriter)
  • Typewriter64: the 64-column version of Typewriter (Jack Dohany) (also #56325 Typewriter 64)
  • Xmascard: a Christmas tree card with UDG baubles in changing colours and three carols (Chuck Dawson) (also #56326 Xmas Card)
  • figForth: fig-FORTH for the TS2068, with support for bank switching, the Timex printer and extended memory, released to the public domain (Robert Burton) (also #56327 figForth v1.0)

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.

Image Gallery

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

Tags

Downloadable TS 2068 Collection