Timex Sinclair Public Domain Library Tape 1001

Developer(s): Tim Ward
Date: 198x
Type: Cassette
Platform(s): TS 1000

Tape 1001 of the Timex Sinclair Public Domain Library. Assembled by Tim Ward from many sources. Contains programs 10001–10050: 9 on side A and 41 on side B. Side A holds nine larger programs: Blackjack, a bank book, a machine code editor, two word processors, an address file, a file manager and two games. Side B has 41 short programs, most of them business, finance and arithmetic calculators, with a few games, number tricks and graphics.

Programs on the Tape

Side A

  • 10001 Black Jack: Blackjack with playing cards drawn in block graphics (also #56867)
  • 10002 Bank Book: checking, savings and loan account manager using coded transaction entries (also #56929)
  • 10003 Machine Code Loader/Editor: machine code loader and editor with a 12-option menu: enter hex, list, edit and move memory (also #56935)
  • 10004 Wordy: word processor holding ten 640-character pages, with writing and editing modes (also #56936)
  • 10005 Word Processor: word processor storing 5,120 characters in one string, with paged display and cursor editing (also #56937)
  • 10006 Add File: address book for up to 100 records (ADDFILE, from Compute!, March 1983) (also #56938 Address File)
  • 10007 Star Blasters: space combat against an approaching alien ship, by Dan Tandberg (from Sync, January/February 1983) (also #56939)
  • 10008 File Manager: menu-driven flat-file database with add, change, delete, search and sort (from Microcomputing, March 1983) (also #56940)
  • 10009 Space Crisis: planet-naming quiz in which right answers slow a starship before time runs out (also #56941)

Side B

  • 10010 Real Estate Spreadsheet: real estate listing database and spreadsheet viewer for up to 60 properties (also #56985)
  • 10011 Decision Maker 1: answers YES or NO at random (also #56986)
  • 10012 Decision Maker 2: picks one of ten joke managerial decisions at random (also #56987)
  • 10013 Unit Price: works out the unit price of an item (also #56988)
  • 10014 Salesman Commission: calculates and prints a salesman’s commission (also #56989)
  • 10015 Media Money cost of ads: compares the cost per thousand of two advertising media (also #56990 Media Money)
  • 10016 Ad Profit: advertising profit and break-even calculator (also #56991)
  • 10017 Hourly Wages: gross wages with overtime over 40 hours (also #56992)
  • 10018 Security Code: generates and prints random four-digit security codes for a week (also #56993)
  • 10019 Marketing Performance: bar chart of eight quarters of marketing figures (also #56994)
  • 10020 Quiz Maker: builds and gives multiple-choice, true/false or direct-answer quizzes (from Syntax Quarterly, Spring 1983) (also #56995)
  • 10021 Time / Distance: trip time from a fixed distance and speed set in the listing (also #56997)
  • 10022 Circumference: circumference of a circle with a fixed diameter (also #56998)
  • 10023 Area of Circle: area of a circle with a fixed radius (also #56999)
  • 10024 Checksum: computes a weighted check digit for a six-digit number (also #57000)
  • 10025 Ticket Drawer: draws random winning numbers from a range of raffle tickets (also #57001)
  • 10026 Super Slot: slot machine using random graphic characters (also #57002 Super Slot-O)
  • 10027 Loan Payment: monthly payment on a loan (also #57003)
  • 10028 Stock Questionnaire: 15-question scoring sheet for judging a stock purchase (also #57004)
  • 10029 Savings Plan: month-by-month savings plan with deposits and interest (also #57005)
  • 10030 Ice Cream Cone: draws a two-scoop ice cream cone in a choice of flavours (also #57006)
  • 10031 Miles Per Gallon: monthly miles-per-gallon and mileage deduction report (also #57007)
  • 10032 Brain Terrain: text mystery game: search memory zones for clues to a missing person’s home year (also #57008)
  • 10033 Savings Projection: year-by-year compound interest projection (also #57009)
  • 10034 Car Payment: monthly car loan payment (also #57010)
  • 10035 Shoppers Friend: compares the unit prices of two brands (also #57011)
  • 10036 Secret Message: makes a random number code for each letter of the alphabet (also #57012)
  • 10037 Word: prints a word down, up, forwards and backwards (also #57013)
  • 10038 Random Bar Chart: plots 50 random bars and draws their mean (also #57014)
  • 10039 Sales Bar Chart: two-series bar chart of five years of random sales figures (also #57015)
  • 10040 Moving Average: moving average, mean and standard deviation of entered numbers (also #57016)
  • 10041 Multiples: shows the multiples of a number from 0 to 99 on a grid (also #57017)
  • 10042 Factorizing Numbers: breaks a number into prime factors (also #57018)
  • 10043 Number Base Conversion: converts between binary and decimal (also #57019)
  • 10044 Draw: draw and erase on the screen with the cursor keys (also #57020)
  • 10045 Temperature Conversion: Celsius and Fahrenheit conversion (also #57021)
  • 10046 Russian Roulette: Russian roulette: pull the trigger ten times (also #57022)
  • 10047 Number Juggle 1: arithmetic trick that reveals the number you thought of (also #57023)
  • 10048 Number Juggle 2: two-player version of the number trick (also #57024)
  • 10049 Multiplication Tables: multiplication table for any number (also #57025)
  • 10050 Degree of Conversion: table of Fahrenheit, Celsius and Kelvin over a chosen range (also #57026)

The download has a TZX file, a plain-text listing (.b81) and screenshots for each program, in tape order by side, with the tape’s contents list (TS PDL 1001.txt) and photos of the cassette and its label. Program names follow that list; where it says “Unknown”, the name of the program’s own page is used.

Content

Ad Profit

Program

Enter your retail price, wholesale cost, ad spend, and units sold to instantly calculate campaign profit — or find your break-even point automatically.

Address File

Program

A 100-record address book with entry, change, list, and name/city search modes — all packed into under 150 lines of BASIC.

Area of Circle

Program

A compact circle-area calculator using the built-in PI constant, hardwired to radius 5 — then it lists its own source code after saving.

Bank Book

Program

A complete three-account personal finance ledger from 1983 that validates transactions, sorts by date, compounds monthly interest, and prints formatted statements.

Black Jack

Program

A fully playable Blackjack game with graphically rendered playing cards built from block graphics, ace logic, five-card trick bonuses, and a wagering system.

Brain Terrain

Program

Crack a time-travel mystery by decoding memory zones — this adventure hides its clues in a clever delta-encoded string table with a scrolling marquee display.

Car Payment

Program

A car loan payment calculator using the amortisation formula — spot the typo that breaks the interest rate conversion before it runs.

Checksum

Program

Enter six digits one at a time and this program calculates a weighted checksum digit using alternating 1-2 weights and iterative digit reduction.

Circumference

Program

A short circle circumference calculator that uses the built-in PI constant and a fixed 35-foot diameter — with a few intriguing unreachable lines at the end.

Decision Maker 1

Program

A coin-flip decision maker that answers YES or NO to any question — but there's a hidden gap where it stays silent.

Decision Maker 2

Program

This tongue-in-cheek management consultant simulator picks one of ten corporate non-answers at random — press any key to get your next decision.

Degree of Conversion

Program

Enter a Fahrenheit range and step size, and this temperature converter prints a tidy three-column F/C/K table with randomly-generated block-graphic borders.

Draw

Program

A pixel-drawing program with cursor keys 5–8 and toggleable draw/erase modes, showing boundary clamping and mode-switching techniques in under 20 lines.

Factorizing Numbers

Program

A prime factorisation tool using trial division with an odd-number skip and square-root cutoff — see how the flag variable catches lone primes.

File Manager

Program

A full flat-file database manager with add, edit, delete, search, sort, and tape-save — all driven by a single computed GOSUB dispatch.

Hourly Wages

Program

A straightforward payroll calculator that correctly handles overtime at time-and-a-half for any hours worked beyond a standard 40-hour week.

Ice Cream Cone

Program

Choose two flavours and watch this program build a two-scoop ice cream cone pixel by pixel using block graphic characters and clever circular approximation.

Loan Payment

Program

A compact loan amortisation calculator that applies the classic annuity formula, converts annual interest to monthly rate, and loops for repeated calculations with a keypress pause.

Machine Code Loader/Editor

Program

A complete ZX81 machine code toolkit offering hex entry, memory listing, block move/copy, RAMTOP adjustment, byte search, and RAND USR execution from a single menu-driven program.

Marketing Performance

Program

Enter up to eight quarters of marketing figures and watch this program draw a comparative horizontal bar chart — capped at 22 units each — using block graphics.

Media Money

Program

Enter ad cost and circulation for two media and instantly compare their Cost Per Mille to find the better advertising buy.

Miles Per Gallon

Program

A practical monthly car expense tracker that computes MPG, fuel costs, IRS mileage deductions, and optional additive costs, then prints a full report via LPRINT.

Moving Average

Program

A compact rolling-window statistics tool that continuously tracks mean and population standard deviation across a user-defined number of inputs.

Multiples

Program

Enter any number and watch its multiples highlighted among 0–99, while non-multiples are masked with block graphic characters in a clever visual trick.

Multiplication Tables

Program

A compact multiplication table printer that quizzes you on any times table up to ×10, looping until you type "NO" to quit.

Number Base Conversion

Program

A bidirectional base-2/base-10 converter that uses logarithms to find the highest bit and processes binary strings character by character.

Number Juggle 1

Program

A number-guessing trick that walks the player through doubling, adding, and subtracting, then seemingly reads their mind to reveal the original number.

Number Juggle 2

Program

A two-player number-guessing trick that secretly reverses each player's arithmetic steps to reveal their original numbers — can you spot the algebra?

Quiz Maker

Program

A complete quiz-authoring toolkit that packs questions, answers, choices, and explanations into a single string using pointer arrays — and even pre-calculates available memory before you begin.

Random Bar Chart

Program

Fifty random bars plotted pixel by pixel, then a calculated mean line drawn across them — a compact statistics visualiser in under 130 lines of BASIC.

Real Estate Spreadsheet

Program

A real estate database storing 60 property records with a machine code–driven scrolling spreadsheet view, all packed into a single BASIC program.

Russian Roulette

Program

Pull the trigger ten times in this Russian Roulette simulator where a single RND value determines your fate — and one subtle probability gap might just save your life.

Sales Bar Chart

Program

A random-data dual-series bar chart using block graphics to show overlapping sales figures for nuts and bolts across five simulated years.

Salesman Commission

Program

A commission calculator that mirrors every result to a printer in inverse video, with a tight input loop and some intriguing unreachable code at the end.

Savings Plan

Program

A month-by-month compound savings calculator that tracks balance, monthly interest, and cumulative interest with careful two-decimal rounding throughout.

Savings Projection

Program

Enter a starting balance, interest rate, and time horizon to watch compound interest build year by year in this simple savings projection tool.

Secret Message

Program

A random substitution cipher generator that assigns each letter a unique three-digit code, using collision detection to guarantee no duplicates appear in the table.

Security Code

Program

A week's worth of random four-digit security codes, one per day, generated and sent straight to the printer with a neat rejection-sampling trick.

Shoppers Friend

Program

Enter two brand names, quantities, and prices, and this vintage shopping helper instantly calculates which product gives you the best value per unit.

Space Crisis

Program

Race to decelerate a starship to docking speed by correctly naming planets in this narrative quiz game that pits your solar system knowledge against a dual-speed countdown.

Star Blasters

Program

Guide your Earth ship against waves of encroaching aliens in this 1983 arcade shooter that uses clever string tricks to animate laser fire across the screen.

Stock Questionnaire

Program

A 15-question weighted stock evaluation quiz that tallies P/E ratios, dividends, and market conditions to decide whether a share is worth buying.

Super Slot-O

Program

Spin three random graphic characters and match them to win virtual cash in this vintage slot-machine simulator with a surprisingly clever character-selection algorithm.

Temperature Conversion

Program

A two-way temperature converter with a subtle but consequential arithmetic bug hiding in one of its conversion subroutines — can you spot it?

Ticket Drawer

Program

A BASIC raffle drawer picks random winners from a numbered ticket range — but a subtle variable bug means the range calculation may never work as intended.

Time / Distance

Program

A no-frills trip-time calculator that divides hardcoded distance by speed — edit two lines and run to get your answer in hours.

Unit Price

Program

A handy retail utility that takes item name, quantity, and total price, then instantly calculates and displays the cost per unit.

Word

Program

Enter any word and watch it displayed four ways — downward, upward, forward, and backward — in a neat BASIC string-manipulation demo.

Word Processor

Program

A surprisingly capable word processor that stores over 5,000 characters, offers paged navigation, search, inline editing, and printer output — all in pure BASIC.

Wordy

Program

A full-featured, ten-page word processor with two editing modes, cut-and-paste buffers, text justification, and printer output — all in pure BASIC.

Image Gallery

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

Tags

Downloadable TS 1000 Collection

People