SYNC Special Issue 1982

Introduction to special issue, describing regular content of the magazine. Includes instructions for potential authors.

Short program.

Reprint of the article from the first Kitchen Sync column.

Short program to provide checksums to users as they type in programs, to ensure they’ve been entered correctly.

How to start using machine code on the ZX80/81.

Program to demonstrate a database on the ZX81.

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.

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.

Keywords as well as tokens could be typed into program lines in full — spaces and all— with practically a single keystroke.

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…