Volume: 1
Issue: 2
Articles
| Title | Description | Computers |
|---|---|---|
| 8K ROM Programs Here! | Our technical staff has the only prototype 8K ROM in the U.S. and we’re wording on programs so you will be able to use your new ROM immediately. We’re especially impressed by the graphics capability and the PLOT-DRAW-PRINT sequence. | Sinclair ZX80 |
| Authorized Software | Image Computer Products of Northbrook, IL, is the authorized ZX80 software producer. | Sinclair ZX80 |
| Big Character Program | Make your video characters 8 times bigger using ROM character images and substituting graphic symbols for dots. | Sinclair ZX80 |
| Cassette Eavesdropper | Use this simple circuit to listen to your programs as they save and load or to search for programs on tape without pulling the earphone cord and adjusting the volume control each time. | Sinclair ZX80 |
| Comparison Between The Sinclair ZX80 and The TRS-80 Color Computer | Table comparing the various hardware and programming language features. | Sinclair ZX80 |
| Compu-Calendar | This three-part program returns correct day name, changes Gregorian dates to corresponding Julian day numbers, and computes total days between any two dates from Jan. 1 AD to Feb. 2300. | Sinclair ZX80 |
| Dear Editor | Letters about inverting video signal; TAB subroutine; contacting other owners; machine language programming. | |
| Extended ZX80 Service Contracts | Sinclair now offers extended service contracts to ZX80 owners. $25 per year will cover all parts and labor and return shipment of the unit. | Sinclair ZX80 |
| How to Wire a Big Keyboard | Although the ZX80 has many fine features, some people complain about the small pads of the touch keyboard that comes with it. But this is not a serious problem. The ZX80 uses a matrixed keyboard, so you can easily add a bigger, parallel keyboard. | Sinclair ZX80 |
| Make-Do Connectors | At SYNTAX we use a Radio Shack connector. Their solderless edge-card, 40-pin connector (#276-1558) usually picks up all the contacts we need. We also use 40- conductor, insulation displacement, ribbon cable and mount the connector with a metal-jawed vise. | Sinclair ZX80 |
| Multiplication Exercise | This program asks for the multiplier (any number up to 3276) and then presents 5 problems, randomly choosing a number from 1 to 10. You get two tries to answer correctly. After the second try, the machine gives you the right answer with the next problem. At the end, it displays the number correct and | Sinclair ZX80 |
| New 8K ROM Plus Printer | Sinclair is revamping the ROM. The new chip will support the low cost printer Sinclair plans to introduce next year. | Sinclair ZX80 |
| New Magazine | Announcement of Creative Computing’s SYNC magazine. | Sinclair ZX80 |
| New Modem | MicroPeripheral Corp. will introduce a modem for ZX80 and MicroAce machines by 1 January 1981, enabling you to connect to other computers by telephone. | MicroAce, Sinclair ZX80 |
| Reverse Video for ZX80 | Letter to the editor describing a reverse-video circuit for the ZX80. | Sinclair ZX80 |
| Season's Greetings | Here is our personalized holiday greeting to you, courtesy of your ZX80 or MicroAce. With a little clever substitution in lines 450- 640, you can adapt this listing to produce your own video Christmas card. | MicroAce, Sinclair ZX80 |
| Sinclair Shipments Pick Up | Sinclair caught up with their ZX80 shipping schedule in November because production rates are up to meet the demand. | Sinclair ZX80 |
| Software Catalogs Available | Software catalogs for ZX80 and MicroAce owners available from Image Computer Products. | MicroAce, Sinclair ZX80 |
| Subroutines -- Super Step-Savers | Subroutines are mini-programs; they execute a series of steps apart from the main program. In essence, you tell the computer, “Go do those steps and then come back here and proceed with the main program.” The ZX80 remembers where it was and returns to the following line after executing the subroutine. You can call the | Sinclair ZX80 |
| TAB Subroutine | Short subroutine to simulate the TAB function. | Sinclair ZX80 |
| ZX80 and MicroAce Bus Pinout | MicroAce, Sinclair ZX80 |
