| [Dann Weldkamp would like to hear ...] |
Reader in Iowa. |
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| 4K ROM: Display Routine |
DISPLAY begins the 4K ROM’s input/output module at 013Ch, or 316d. |
Sinclair ZX80 |
| Beginner's Loading ML Programs |
Learn how to put machine language (ML) programs into your computer. |
Sinclair ZX80 |
| CAI Printer Update |
CAI Instruments will offer software components to make their Widget printer compatible with both 4K and 8K ROMs. |
Sinclair ZX80, Sinclair ZX81 |
| Data File Format |
Here’s a program for 2K MicroAces that allows you to create indexed files on tape. |
MicroAce, Sinclair ZX80 |
| Dear Editor |
Letters about languages other than BASIC; Syntactic Sum; stereo cassette players; MicroAce kit; hardware changes voiding warranty; constructing characters that are smaller. |
MicroAce |
| For Syntax Readers Only |
Sinclair now offers used ZX80s for only $49.95. According to Nigel Searle of Sinclair, most of these machines were sold in England as kits and assembled incorrectly. |
Sinclair ZX80 |
| Improving Display |
One problem with creating graphic displays on the ZX80 is users’ inability to interact with display. This program allows you to manipulate a cursor on 14 screen lines and to insert characters where desired. |
Sinclair ZX80 |
| In and Out of Machine Language |
When you use machine language programs, you have no keys to press directly. So we need to tell the machine to RUN a machine language program, and to tell it to STOP. |
Sinclair ZX80, Sinclair ZX81 |
| Input Port |
Capture data through a port, place it into a CPU register. |
MicroAce, Sinclair ZX80 |
| LJH's Keyboard |
Ad says “wired keyboard hooks up in minutes,” but this project may take beginners 1-2 hours. |
MicroAce, Sinclair ZX80 |
| Loan Amortization Revisited |
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Sinclair ZX81 |
| MicroAce to Discontinue Kits |
MicroAce is phasing out its computer kits. According to Bill Clark of MicroAce, Sinclair didn’t renew MicroAce’s license. The company also scrapped plans for a kit using larger ROM. “We can’t compete with the ZX81 in price,” Clark said. Other projects continue, however. MicroAce plans upgrade kits for machines, and video boards are in production. |
MicroAce |
| ML Scroll Routine |
In 1K ZX80s, large programs easily overfill the 24 available screen lines. This machine language routine deletes the top line from the screen so you can add lines to the bottom. |
Sinclair ZX80 |
| Soldering Hints |
Even if you’re not a hardware person, you can connect external devices to your computer without fear. You only need a few hints to successfully solder your ZX80. |
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| Star Count |
After each complete scan of the star field, you must make an estimate of the total number of stars visible on the view screen. |
Sinclair ZX80 |
| Syntax Errors |
Corrections to Loan Amortization and 30 Programs for the Sinclair ZX80. |
Sinclair ZX80 |
| ZX80 Double Breakout |
Review of the game from Softsync. |
Sinclair ZX80 |
| ZX80 Pocketbook |
THE ZX80 P0CKETB00K is now available from SYNTAX. |
Sinclair ZX80 |
| ZX80/ZX81 Users Club |
The ZX80/ZX81 Users Club in Surrey, England serves all users, beginner to expert. |
Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
