As can be expected with any major hardware upgrade, there are a few conflicts when the Oliger video system is used in conjunction with other equipment. Summarizes the fixes we and others have come up with to date.
TMS9918A Video Upgrade For The TS1000 Read More »
This article explores a blend of two forms of logic: arithmetic and Boolean logic (AND, OR, and NOT) operations.
BASIC Tipics: Use Logic Read More »
You ZX/TS users have been told, and told again, “Don’t mess with the interrupts” and “Never use the HALT command.” The severity of the admonitions seem to imply that a fate-worse-than-crashing awaits those who would tamper with such things. When HALT is encountered, the Z80 CPU stops running your program. In this way it is
The purpose for writing this article is to show you how easily you can get beautiful math-art creations using a minimum of hardware. The program presented is for the ZX81/TS1000 or TS1500, but can readily be extended to virtually any computer ever built.
Mandelplot: Mathematical Printer Art Read More »
When using the A&J Microdrive “ESOS” (Exatron Stringy Operating System), there are times when you don’t want it to change your RAMTOP.
All too often I hear comments like “Since I got my TS2068, the TS1000’s been sitting on the shelf, awaiting a trip down memory lane.”
This article describes a project which may be useful for anyone desiring to use software for the ZX81, TS1000 or TS1500 on a different computer. The program version presented here is designed to convert Sinclair BASIC programs into ASCII text which can be sent from the Sinclair computer to the serial port of a Commodore
PET ASCII Output Program for the Timex/Sinclair ZX81 Read More »
This program will run with as little as 1K of RAM and will allow frequency measurements of up to 28,500 Hz. This is useful for tuning RTTY tone generators, electronic musical instruments, tone encoders, and for calibrating audio generators. The audio signal is fed to the computer’s earphone jack, and the frequency is displayed to
Audio Frequency Counter Program for the Timex/Sinclair ZX81 Read More »
So, you got one of those TI99 keyboards from Radio Shack for $2.95 and still have not wired it up to your 1000 or 2068, right? I was going to write this up a while ago, but I learned that so many different companies made the circuit boards that it would be difficult to give
Many memory expansion boards have been offered for ZX81’s and TS1000s. One of the first to break down through the $100 price barrier was the Gladstone 64K RAM pack. It gave you use of RAM memory from locations 8K through 64K. Its only short coming was that you had to ALWAYS use all of the
Adding On To Gladstone Read More »
In Volume 1, I ran a series on getting the most out of your ZX/TS with full-size printer and Memotech Centronics interface. Since then, this CIF has become unavailable. Fortunately, several other printer interfaces (both parallel and serial) are available. These include Centronics Parallel IF’s by Aerco, Byte-Back, John Oliger, and Tasman, and serial IF’s
Universal Printer Driver Read More »
