| Beginners' Column: REM Revisited | Storing machine code in REM statements. | Sinclair ZX80, Sinclair ZX81 |
| CAI Ships Widgets | At press time, CAI’s Bob Swann confirmed reader reports- 100’s of Widgets shipped. Expect printers in 2 wks, tape drives in 4. Widgets chew up the top 4K of memory – 2 for tape and 2 for printer. | MicroAce |
| Changes to Amazing Active Display | John Sampson of College Point, NY, called in response to the letter in the Oct. 81 issue about The Amazing Active Display. | Sinclair ZX80 |
| Dear Editor | ZX-Microfair in London; Microace 8K ROM has bugs; Microace regulator; floating point in 8K ROM. | MicroAce, Sinclair ZX80, Sinclair ZX81 |
| Dear Sinclair Research | It is with great displeasure that I am returning my Sinclair ZX80. Response from Nigel Searle. | Sinclair ZX80 |
| Digital Clock | This program operates as a digital clock, showing A.M. or P.M. and changing at 12:00. | Sinclair ZX81, Type-in program |
| Find Clean Tape on 8K | Quickly find the unused section of tape for SAVEing 8K programs on multi-program tapes on any RAM size. | Sinclair ZX81, Type-in program |
| Hardware Hints | Potential solution to overheating; labeling keys on big keyboards. | Sinclair ZX80 |
| Improved 4K Sine Calculation | Use these lines in 4K programs requiring sines between 0 and 90 degrees. | Sinclair ZX80, Type-in program |
| Inverse Big Characters | To print 8x size characters in reverse video, change these lines from Big Characters (Dec. 80). | Sinclair ZX80, Type-in program |
| Microace interface to MM57109 calculator chip | R.B. Turner plans to interface his 4K/2K MicroAce to the MM57109 programmable calculator chip to provide many scientific calculations. | MicroAce |
| Multipurpose Memory Expansion | SABRE Systems has developed a multipurpose memory expansion board to use in a variety of RAM/EPROM combinations. | Sinclair ZX80 |
| New 8K ROM Potpourri | Sinclair’s first 8K ROM had a few bugs; list of changes to the 8K ROM map. | Sinclair ZX81 |
| Reduce 4K Loading Noise | 4K ROM users: instead of building our Cassette Eavesdropper (Dec. 80) to reduce loading noise, try a dual mini-plug from Radio Shack. | Sinclair ZX80 |
| Reverse | The object of this game, rewritten from one published by Creative Computing, is to get the numbers in ascending order from left to right. | Sinclair ZX80, Sinclair ZX81, Type-in program |
| Sinclair's Printer Shown in US | Clive Sinclair of Sinclair Research demonstrated his ZX81 printer at the the US introduction of the ZX81 computer in Boston on Oct. 7. | Sinclair ZX81, Type-in program |
| Super Monzxer | This adventure game of survival challenges you with man-eating spiders, giant bats, pits and monzxers. You are in a cave with 5 levels of 20 rooms each. | Sinclair ZX81, Type-in program |
| Syntax Errors | Jon Passler noticed an error in his 8K Roundoff routine (Oct. 81). | Sinclair ZX81 |
| The ZX81 Companion | Bob Maunder’s new book is very different from The ZX80 Companion. It aims to appeal to every ZX81 owner, but more to “students” of computing whether at home or at school. | Sinclair ZX81, Timex/Sinclair 1000 |
| Zeta Software | MCD Name Changer. | Sinclair ZX81, Type-in program |
| ZX81 - The New Standard | For only $149, you now get 8K BASIC, continuous display, the choice of channel 2 or 3 and a newly styled case. | Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 and 16K RAM Schematics | A new company, Heuristics, is the exclusive distributor of ZX81 and 16K RAM pack schematics. They also plan ZX81 hardware and software. | Sinclair ZX81, Timex/Sinclair 1000 |
