A Package From England, or, How I got a real ZX Printer |
Details on ordering a printer from WH Smith and adapting for US use. |
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Adding a Joystick to Your ZX81 |
Wire a joystick to map to the arrow keys. |
Sinclair ZX81, Timex/Sinclair 1000 |
Adventure A |
Adventure is not for impatient or unimaginative players. It has no bombs, no graphics, and no split-second decisions. It is an intellectual game requiring thought rather than reflexes. |
Sinclair ZX81 |
Annuity |
Program calculates the payments needed to pay off a loan or how many years it takes to pay off a loan at a fixed payment. |
Sinclair ZX81 |
Byte-Back Modem Shipments Delayed |
Byte-Back will ship no modems for 4-6 weeks. |
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Dear Editor |
Cassette recorders; speed with 16K; jumping to program lines quickly; handling negative numbers; wirewrap edge connectors; replacing cassette jacks; techniques for saving memory variable space. |
Sinclair ZX81 |
Exchanging Registers, Part 6 |
In addition to the eight registers A,F,B,C,D,E,H and L covered in an earlier article, the Z80 (central processing unit in your ZX80/81) has a twin set of alternate registers. |
Sinclair ZX80, Sinclair ZX81 |
Expanding Existing 16K Programs |
If you upgraded to 48K RAM for your ZX81, you may think it simple to add a few program lines and enlarge the variable arrays in existing 16K RAM programs to utilize the increased memory capacity. |
Sinclair ZX81 |
Hardware Preview: RD8100 System |
RD8100 motherboards and modules are building blocks that plug onto your computer or together to create instant systems. |
Sinclair ZX81 |
Line Renumbering |
Two approaches to renumbering program lines, one in Basic, the other in machine code. |
Sinclair ZX81 |
Loading Hexadecimal Listings |
This program converts the hex and stores it into a space explicitly for it. |
Sinclair ZX81 |
New Prices from CAI |
CAI Instruments announced new prices for their ZX peripherals. |
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New Product Announcement (Syntax v3 n6) |
ZX FORTH, battery back-up units. |
Sinclair ZX81 |
Numbers Held Inexactly on the ZX81, Part 4 |
The ZX81 doesn’t hold simple decimals like .5 & .25 exactly. |
Sinclair ZX81, Timex/Sinclair 1000 |
Program Improvements |
Improvements to READ-DATA-RESTORE, Flower Plot, Income Tax program. |
Sinclair ZX81 |
Random Pixel Plot |
Two line program to randomly plots points. |
Sinclair ZX81 |
Report from the 3rd ZX Microfair |
The third ZX Microfair was held 30 April-1 May 1982 in London. Besides Sinclair’s new Spectrum, we saw some new ZX81 products. |
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Screen Background for Games |
A dark or solid background often gives a better effect for printing or plotting in games. With an 8K ROM and 16K RAM, an almost instant background is possible in BASIC. |
Sinclair ZX81 |
Sinclair Drops US ZX Prices as of 1 June |
Sinclair Research lowers the prices on their ZX products in the US 1 June 1982, according to Margaret Bruzelius of Sinclair. |
Sinclair ZX81 |
Spectrum Shown at London ZX Fair |
SYNTAX editors saw Sinclair’s Spectrum at the 3rd ZX Microfair in London (see May 82). |
Sinclair ZX Spectrum |
Syntax Errors |
Using Program 1 in Frank O’Hara’s Numbers Held Inexactly, Apr.82, 1E13 gives 172 17 132 231 42. |
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The Sinclair ZX81 Programming for Real Applications |
This book is aptly billed as being for people who want to get down to business with their ZX81s. |
Sinclair ZX81, Timex/Sinclair 1000 |
UK Products Listing |
Want to know first-hand what’s happening with British ZX hardware, software and publications? We have a limited number of official show guides from the 3rd ZX Microfair, held 30 April-1 May in London. |
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Users' Groups |
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