Kayde Electronic Systems Ltd.

Works on Sinclair power supply.

Gives 448 extra pre-programmed graphics symbols. The ROM contains lower-case letters, bombs, bullets, rockets, tanks, a complete set of invaders graphics and more. The board also has a spare socket that will accept another 4K of ROM, like the 4K TOOLKIT ROM or 1K/2K RAM, for user-defined graphics. dk’Tronics and Kayde published several games that

A powerful editor for serious BASIC programmers. Offers 11 new facilities: ALTER (replace a string); BYTES (how much free memory); COPY (duplicates program lines); DELETE (deletes a block); FIND (find a string); HELP; INSERT (merge two programs); KEEP (keeps a block of lines by storing them above RAMTOP); MOVE (move lines within a program); RENUMBER;

High resolution machine language implementation of the arcade game. Requires dk’Tronic’s 4K High Resolution Graphics ROM. 16K.

Extends ZX bus to prevents RAM pack wobble.

Fully cased fully sized keyboard for the TS1000 or ZX81. 40 full stroke keys with all legends printed in 2 colors. Simple soldering of ribbon cable is all that is needed for installation. Repeat key.

You are the boss of a Chicago gang operating a protection racket. Can you survive the rival gangs, the cops, and Nick the Greek? 16K.

High resolution machine language implementation of Pac Man arcade game. Requires dk’Tronics’s 4K High Resolution Graphics ROM.

Flight simulator. Learn to take-off, land and direction-find from the safety of your computer. Similar to Nightlite but without high resolution graphics. 16K.

Space Invaders clone. Defend your position with three laser guns from a 40 alien ship squadron. 16K.

High resolution machine language implementation of the arcade game. Requires dk’Tronics’s 4K High Resolution Graphics ROM.