Most of us are pretty tired of waiting up to a year for delivery and then getting equipment and manuals with obvious mistakes. Couple that with an unresponsive manufacturer and you get frustrated customers. Because of problems detailed below, SYNTAX recommends that you delay purchasing the Widget until CAI Instruments offers correct, complete, and consistent
CAI Instrument’s Widget Board Read More »
Many users are confused about the logical use of AND and OR in the 8K ROM. Here is a touchstone (demonstration) program illustrates various uses of AND and OR.
Polish the board edge contacts for the RAM almost to bare copper. Otherwise grit gets in the solder and causes intermittent contact.
More Hardware Hints Read More »
Brook Mick’s letter (Oct. 81) recalls our early experience with our ZX80. We tried the exercise in the manual, p.24. In the 15th line, every character typed made another disappear from the screen! The answer appeared in an article by David Tebbit, reprinted in Sync.
Notes on the ZX80 Display File Read More »
Knowing how to manipulate individual bits in your ZX80 is essential for efficient Machine Code programmming, so knowing what bits and bytes are is essential also.
Binary Representation Read More »
At last you can know the secret of true flicker-free continuous display through software! If you’re a 4K ROM user envying the ZX81’s continuous display, envy no more. For about $10 you can code a rock-steady, moving display into your 4K ZX80.
Programmable Moving Display Read More »
A simple program that randomly scatters a group of characters on the screen to produce interesting pictures. Using a “*” or “.”, the results look like stars. Other symbols can be used to produce forests, maps, or crazy signs.
Shows a month calendar on the TV screen for user specified month in history or the future. Makes dates in history or future more real. What day of the week were you born? What day of the week will your birthday be in 10 years? Documentation describes the calendar as well as builds the program.
