4K/8K ROM Switch
Review of the ROM switch kit from Marex Electronics.
Sinclair ZX80
SLOW Motion
Review of Video Upgrade Board Kit from Computer Engineering Services. Board adds SLOW mode to ZX80 or MicroAce with 8K ROM.
A Mouthful for Every Occasion
You can call up sensational headlines, forceful commands, whimsical statements, ageless wisdom, and irrelevant nonsense all at the push of a key on your Sinclair computer with the Mouthful program.
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House of Horrors
You are trapped in the dreaded “House of Horrors.” Naturally it is filled with monsters, mummies, skeletons, and strange creatures. Secret passages and mysterious rooms confront you with danger and yet offer the only way out. Your goal is to escape from the house alive.
Chase
Chase is a game of survival. The object is to survive as long as you can. You are set in a playing field, shown as a 20×10 block on your TV screen, surrounded by a lethal fence. Mines are scattered about in the field. You are being chased by five robots which will move straight
ZX/TS Power Supplies
Table of details about and schematics of the ZX80, ZX81 and TS1000 power supplies.
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Meditations on a Hypotrochoid
The plotting capacity of the ZX80(81) enables even the least artistically talented to create some pretty dazzling displays. The much denigrated sine and cosine functions conceal mathematical mysteries that are invisible to mere number crunchers.
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Using the Byte-Back Modem
The Byte-Back modem is a fine device. It works well and actually does more than advertised. The instruction manual, on the other hand, in its attempt to furnish operating instructions, assembly instructions, and engineering data, is a bit sketchy. A description of the non-standard output on the RS232 board is not given nor is there
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Hardware Tips
Robert Hartung comments on some letters from readers. His responses should be regarded as suggestions to help look for the answers.