ZX81 Reference Card
10-panel, 20-page accordian style card.
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Timex/Sinclair 1000
ZX81 Cassette Interface
The Winky Board II is a cassette interface for Timex Sinclair computers that filters electrical interference to yeild clean easy loading tapes, has a LED volume level indicator, can save a program on two tape recorders simultaneously, and contains a program duplication system.
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“Artificial” Expansion of Timex-1000 Memory
Memory-efficient programming techniques add to your storage capabilities.
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Timex/Sinclair Sales Drop
Sales of the Timex 1000 (ne Sinclair ZX81), once the most popular home computer, have plunged. Orders for its new 1500 and 2000 models are far less than projected. Timex, which pioneered the super-cheap home computer and led in the pricing battles, sold 550,000 units in its first five months. Sinclair had sold 150,000 ZX81s
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Improving Timex/Sinclair Tape Loading
Reduce troublesome dropouts and noise problems with a Z-Dubber. Schematic and PCB layout for the Z-Dubber is provided.
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Timex/Sinclair Expansion
Product announcement for Wisconsin Electronics’ 32K plus I/O module. Adds four parallel I/O ports and 32K RAM.
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Upgrading T/S Video
Correction to “Upgrading Timex-Sinclair Video” in the May 1983 issue to address a revision to the ZX81 circuit.
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Math, and More Math
Product announcement for Micro Math, a series of educational math programs for the Timex Sinclair 1000, Commodore PET and VIC-20 computers.
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A Sinclair Quick Fix
Machine code routine to write and read data tapes.
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A T-S 1000 Keyboard You Can Get Your Hands On
The Timex-Sinclair 1000’s keyboard can be a nightmare to programmers and users. This article describes how to construct your own full-size, inexpensive keyboard.
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