| A Method to Protect More than One Line From Deletion |
Short technique to protect ZX81/TS 1000 programs. |
Timex/Sinclair 1000 |
| Basically "IN" |
An advantage of using the IN function instead of INKEY$ is that multiple keys can be sensed. If the keyboard was to be divided into 8 groups so that each group was half a row containing 5 keys, then these groups would be represented by IN addresses as follows: When IN 65278 equals 31 (binary |
Timex/Sinclair 2068, Type-in program |
| Bob's Notebook: Binary Search |
This is program is based on one by John Gilbert published in Timex Sinclair User VoL. 1 #4. Compared to the slower serial search often used in BASIC programs, the binary method is quite fast, doing its job in about one tenth of the time. The reason is that while the serial method looks at |
Timex/Sinclair 2068, Type-in program |
| Clocking the 2068 |
Our 2068’s have a built-in clock, sometimes called the Frame counter. This clock starts at zero every time the computer is turned on. It increments the value at the variable address 23672 every 1/60th of a second until it reaches 255. This takes about 4 1/4 seconds and then resets to zero and increments the |
Timex/Sinclair 2068, Type-in program |
| Disk Droppings |
Introduction to series of articles about disk drive systems. |
Timex/Sinclair 2068 |
| How to Make Back-up Copies of Spectrum Copy-Protected Programs |
Techniques for backing up commercial tapes. |
Sinclair ZX Spectrum |
| Larken Disk Drive Operation |
How to make a boot tape for a Larken disk system. |
Timex/Sinclair 2068 |
| Lunar Calculating |
Program to calculate new and full moon phases. |
Timex/Sinclair 1000, Type-in program |
| PLOT, CLS and SCROLL on the TS2068 |
How to use access the machine code versions of these routines. |
Timex/Sinclair 2068 |
| QL-Corner |
One user’s view of the QL. |
Sinclair QL |
| SincBits |
Notes about the John Oliger disk system, Radio Shack Coco2 mouse connected to Zebra Graphics Pad Interface, Spectrum hardware, other accessories. |
Timex/Sinclair 2068 |
| Subroutine to Clear a Portion of a Screen When Desired |
Short routine for TS 1000. |
Timex/Sinclair 1000, Type-in program |
| The Buzz |
Description of situations when the computer will buzz at the user to indicate an error. |
Timex/Sinclair 2068 |
| To Cut Down on Load and Save Time |
Reduce the amount of time to save/load a TS 1000 program. |
Timex/Sinclair 1000 |
| To Eliminate Screen Blink Resulting from PAUSE Command |
Replace PAUSE with FOR-NEXT loop. |
Timex/Sinclair 1000, Type-in program |
| To Place a Particular Line Number at the Top of Automatic Listings |
Force automatic listings to start at a specific line number. |
Timex/Sinclair 1000 |
| ZX81 News & Resources |
Bruce Taylor’s budget robotics book, Westridge 2050 modems, AERCO FD-ZX floppy disk system, |
Timex/Sinclair 1000 |
