Syntax Errors
Correction to Return on Investment.
Timex/Sinclair 1000
Clarification
Winky Board manufacturer Gerry Russell says the SAVE filter feature should be used only if high frequency RAM pack noise prevents SAVEing.
ZIP-to-State, State-to-ZIP
Technique we used at SYNTAX to make sure our zip and state match in our mailing list.
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Program Access Security System
Short machine code program prevents program access without a code after you LOAD your program.
Program Access Security System Read More »
Learning Timex/Sinclair Basic
Review of the book by David Lien.
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Another Look at 450ns EPROMS vs the ZX81/TS1000
Paul Hunter’s comments on using 450ns EPROMs on ZX/TS computers (May83) strike me as true but incomplete. Paul shows how to add a flip-flop to delay the computer by inserting wait states and thus make the computer read slow EPROMS. You can use another chip select scheme to cure access problems without adding circuitry or
Another Look at 450ns EPROMS vs the ZX81/TS1000 Read More »
ZX/TS Weather Forecast
Forecast tomorrow’s weather, and calculate actual temperatures based on wind chill and humidity readings with this easy-to-use program.
ZX/TS Weather Forecast Read More »
Super Joystick
Use readily available hardware to create a full-function joystick compatible with the ZX81.