SYNC Special Issue 1982 – Timex/Sinclair Computers

Date: Special Issue 1982

Articles

Title	Description	Computers
An Introduction to Machine Code	How to start using machine code on the ZX80/81.	Sinclair ZX80, Sinclair ZX81
An Inventory System	Program to demonstrate a database on the ZX81.
Expression Evaluators at Work	Reprint of the article from the first Kitchen Sync column.	Sinclair ZX80
Perceptions: Syncsums	Short program to provide checksums to users as they type in programs, to ensure they’ve been entered correctly.	Sinclair ZX81
Setting Up Bar Charts	This program listed works with 1K to chart two years of monthly checking account balances with vertical bars. The graph is set up for a range of $0 to $1500, but can be modified for other ranges with a few changes and some trial-and-error experimentation.	Sinclair ZX80
Sync Notes	Introduction to special issue, describing regular content of the magazine. Includes instructions for potential authors.
The "QS Sound Board" for the ZX80/81	Based on the extremely versatile AY-3-8910 sound generator chip, the QS Sound Board features complete software control of the frequency and amplitude of three independent output channels as well as an envelope shaper and noise channel. Mentions QS Motherboard, which allows connecting 16K RAM and sound board at the same time.	Sinclair ZX80, Sinclair ZX81
Try This	Short program.	Sinclair ZX81
Using Key and Token Expressions	Keywords as well as tokens could be typed into program lines in full — spaces and all— with practically a single keystroke.	Sinclair ZX80
Window	A machine language monitor is a utility, provided by most computer systems, which aids in the development of machine language programs. Its basic functions are: a) to allow you to view the contents of each byte in the system’s memory, and b) to allow you to change these values. The program provided here will allow	Sinclair ZX81

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