| 1000 One Chip Mod: A Built-in NVM |
This battery backed-up RAM is a miniaturization and functional equivalent of the famous “Hunter” board. It was designed by Mr. Wilf Rigter of the Vancouver, BC T/S User Group. I owe many thanks to Mr. Rigter for inspiring me to write this article, and assisting with technical advise during the construction and refinement of this |
Timex/Sinclair 1000 |
| 16K - Fitting it "Under the Hood" |
|
Lambda 8300, Timex/Sinclair 1000 |
| 192K ZX/TS Laptop |
Reprint from ZX-Appeal. |
Timex/Sinclair 1000 |
| 24K Internal Non-Volatile Memory |
|
Timex/Sinclair 1000 |
| 24K NVM Inside |
|
Timex/Sinclair 1000 |
| 2K to 4K RAM Upgrade - An Introduction to ZX/TS Hardware |
|
Sinclair ZX81, Timex/Sinclair 1000 |
| 32K NVM System Revisited |
|
Timex/Sinclair 1000 |
| 32K SRAM for the ZX81 |
|
Timex/Sinclair 1000 |
| 40K Non-Volatile Memory |
|
Timex/Sinclair 1000 |
| 64K Byte Memory Expansion for the T/S 1000 |
|
Timex/Sinclair 1000 |
| 8K EEPROM Board |
Build a non-volatile memory expansion board with the Seeq Technology 8K EEPROM. |
Timex/Sinclair 1000 |
| 8K of Very Low Power CMOS RAM In a World Class Computer for Only $0 |
|
Timex/Sinclair 1000 |
| 8K of Very Low Power CMOS RAM In aWorld Class Computer For Only $40 |
Here is a method for installing a Toshiba TCS5S65 PL-15 Very Low Power CMOS SK X B RAM ($40 from Microprocessors Unlimited) in a TS1000 computer. Two of the great advantages of installation are the reduced power consumption (maybe as much as a 30% cut) and the absence of RAM pack wobble and crash. Who |
Timex/Sinclair 1000 |
| A Cheap and Simple EPROM Programmer |
This article will show you how to build an EPROM programmer. Those interested in peripherals for the Sinclairs (floppy disk, electronic typewriters, etc.) can design monitors and controllers for those devices. Eventually you can program independent microprocessors for special purposes. |
Sinclair ZX81, Timex/Sinclair 1000 |
| A Cheap and Simple EPROM Programmer |
|
Timex/Sinclair 1000 |
| A Couple of Simple ZX81/Timex 1000 Modifications |
Internal 16K RAM using 62256; composite video buffer. |
Timex/Sinclair 1000 |
| A Keyboard Interface for Any Timex Computer |
Build a keyboard interface that plugs into the expansion interface of your 1000, 1500 or 2068. Does not require opening computer. |
Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| A Load/Save Switch, Test Tapes, Azimuth Alignment Revisited and Micro Cartridges |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| A New Life for Sinclair/Timex Computers |
|
Timex/Sinclair 1000 |
| A Simple Loading Aid |
Plans for a small device to monitor signal levels when loading programs. |
Timex/Sinclair 1000 |
| A Sure Cure For TS Wobble |
If you’re suffering from this dreaded disease, here’s a simple hardware trick that will have you and your computer feeling tip-top in no time at all. |
Timex/Sinclair 1000 |
| A Video Upgrade? |
Why upgrade the TS1000 video with a TMS9918 video display processor (VDP?) If you find that your computer does its job, but you would like to see it work a lot faster (in SLOW), if you’re tired of that annoying fast mode flicker, if you have a program longer than 16K of BASIC and want |
Timex/Sinclair 1000 |
| Adapting the TI Keyboard to the TS1000 |
|
Timex/Sinclair 1000 |
| Adapting the TI Keyboard to the TS1000 |
|
Timex/Sinclair 1000 |
| Adapting the ZX81 Rampack to the TS2068 |
Adapt the 1016 ram pack, memory mapped to the DOCK bank. |
Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Add an RS-232 Port to Your ZX81 |
Shows how to add a standard communications interface to the ZX81 – an RS-232 serial communications port that will let you access standard printers, modems, and other computers. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Add serial port to your Sinclair |
Project to add a 2050-compatible serial port to the 1000 or 2068. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Addendum: A Simple EEPROMER |
Update to Paul Hunter’s article on Bankswitching for the TS1000 (TS Horizons part 4). |
Timex/Sinclair 1000 |
| Adding A Joystick To The Timex-Sinclair 1000 |
Adapt an Atari joystick to emulate the arrow keys. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Adding a Joystick to the ZX81 |
First part of an article about wiring a joystick to the computer. |
Timex/Sinclair 1000 |
| Adding a Joystick to Your ZX81 |
Wire a joystick to map to the arrow keys. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Adding a Video Monitor to your Sinclair ZX81 |
Simple diagram for tapping off the signals going into the RF modulator. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Adding On To Gladstone |
Many memory expansion boards have been offered for ZX81’s and TS1000s. One of the first to break down through the $100 price barrier was the Gladstone 64K RAM pack. It gave you use of RAM memory from locations 8K through 64K. Its only short coming was that you had to ALWAYS use all of the |
Sinclair ZX81, Timex/Sinclair 1000 |
| Additional Byte-Back Memory Pack Notes |
Thanks to John Oliger’s NOT M1 decoding circuit, many new and excellent pieces of software are coming into the market place that make use of machine language routines in the 32K-48K (8000-BFFF hex) region of memory. Some examples of these would include Hot Z-II by Ray Kingsley and Memotext in RAM, Version 3, modified and |
Timex/Sinclair 1000 |
| An Illuminating Idea |
Hardware and software to switch up to four 5-amp loads at up to 110v. |
Timex/Sinclair 1000 |
| Announcing: The IKI (An IBM Keyboard Interface for 1000/2068) |
The IKI can be used with the ZX80, ZK81, T/S 1000, T/S 1500, Spectrum and T/S 2068 computers. It is compatible with all interfaces for those computers. The IKI works with any IBM XT-compatible keyboard. The keyboard must have an XT/AT selector switch. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Another Look at 450ns EPROMS vs the ZX81/TS1000 |
Paul Hunter’s comments on using 450ns EPROMs on ZX/TS computers (May83) strike me as true but incomplete. Paul shows how to add a flip-flop to delay the computer by inserting wait states and thus make the computer read slow EPROMS. You can use another chip select scheme to cure access problems without adding circuitry or |
Sinclair ZX81, Timex/Sinclair 1000 |
| Autotape |
|
Timex/Sinclair 1000 |
| Bank Switching for the TS 1000, Part 1 |
|
Timex/Sinclair 1000 |
| Bank Switching for the TS 1000, Part 2 |
Describes some of the hardware needed for the project. |
Timex/Sinclair 1000 |
| Bank Switching for the TS 1000, Part 3 |
|
Timex/Sinclair 1000 |
| Bank Switching for the TS 1000, Part 8 |
This is the last instant of this series. Routines to save (and reload) bank data on tape are included in the 2K operating system. These are necessary for back-up and because the memory in most banks is volatile. |
Timex/Sinclair 1000 |
| Bank Switching for the ZX81, Part 2 |
In this section the various options in the menu of the BSOS (bank switching operating system) will be discussed. |
Timex/Sinclair 1000 |
| Beep, beep |
Keyboard beeper. |
Timex/Sinclair 1000 |
| Beep, Beep |
Beep circuit for TS 1000. |
Timex/Sinclair 1000 |
| Break Out with This Sinclair Interface |
Educate your ZX81 — teach it to talk to your H8 or some other outside device. Includes schematic for a buffered parallel connection and software for both computers. |
Timex/Sinclair 1000 |
| Buffering the Data Bus |
Why it’s necessary to buffer the data bus when adding peripherals and how to do it. How the resistors on the data bus are necessary to the video signal generator. |
Timex/Sinclair 1000 |
| Bug Alert: One-chip NVM |
The “One-chip NVM” in SWN 4:1 shows a minor discrepancy between the schematic (Fig. 3) and the pictorials and instructions. |
Timex/Sinclair 1000 |
| Build a 64K Dynamic Memory Board |
|
Timex/Sinclair 1000 |
| Build an Uninterruptible Power Supply |
Add a small UPS to the TS1000. |
Timex/Sinclair 1000 |
| Build your own EPROM blower without blowing a fortune |
Build an 8255-based EPROM programmer, for 2516 and 2532 devices. |
Timex/Sinclair 1000 |
| Build Your Own EPROM Programmer and Centronics Printer Interface - Part I |
Multi-part article series. |
Timex/Sinclair 1000 |
| Build Your Own EPROM Programmer and Centronics Printer Interface - Part II |
|
Timex/Sinclair 1000 |
| Cassette Recorder Interface |
Build a small interface unit to improve program loading. |
Timex/Sinclair 1000 |
| Cassette Tape Load/Save Monitor |
|
Timex/Sinclair 1000 |
| Centronics Style Port TS-1000 |
|
Timex/Sinclair 1000 |
| Cheap Power |
Surplus power supplies can double a ZX/TS’s load capabilities. |
Timex/Sinclair 1000 |
| Circuit Circus |
Excerpted from SWYM Newsletter, Seattle Sinclair Users Group. Sync inverter for QL, load fix for ZX81/TS1000, TOS power supply, modem power. |
Sinclair QL, Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Circuit training helps to build good characters |
Expansion to allow user-defined characters. |
Timex/Sinclair 1000 |
| Clearer Video |
|
Timex/Sinclair 1000 |
| Connect A Composite TTL Monitor to a TS1000/QL |
Schematic to connect a TS1000 or QL to a monochrome TTL monitor by extracting HSYNC and VSYNC signals. |
Sinclair QL, Timex/Sinclair 1000 |
| Connect a Monitor to the TS1000 |
How to connect a TS1000 directly to a composite monitor. |
Timex/Sinclair 1000 |
| Connect a Monitor to the TS1000 |
|
Timex/Sinclair 1000 |
| Connect a Monitor to the TS1000 |
|
Timex/Sinclair 1000 |
| Connect a Monitor to the TS1000 |
|
Timex/Sinclair 1000 |
| Convert your T/S,ZX to Color |
Build an add-on to connect a 6847 video display generator (same as in Radio Shack Color Computer) to your TS1000. |
Timex/Sinclair 1000 |
| Cooling Your ZX81/TS 1000 |
|
Timex/Sinclair 1000 |
| Creating a Four Port Expansion Decoder |
Memory-mapped IO for the 1000 computer. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Cursor Joystick (for the ZX81 & 2068) |
Describes how to wire a joystick port for use with a Spectrum ROM. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Custom Keyboard Tip |
Did you hook up one of those TI keyboards to your ZX81/TS1000? Don’t you wish it had all the Sinclair legends on the keys? Well, if you can find an old membrane keyboard (remember those?) you can cut it up and paste the legends onto the keys with silicone glue. |
Timex/Sinclair 1000 |
| Dock Bank Memory for Twenty Cents: Convert a TS-1000 Ram Memory for the TS-2068 |
How to convert a 64K RAM pack for the TS1000 to map to dock memory on the TS2068. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Driving a Monitor From the T/S 1000 |
|
Timex/Sinclair 1000 |
| Driving a monitor from the TS 1000 |
Reprint of an article from an earlier issue. Transistor-based circuit. |
Timex/Sinclair 1000 |
| Driving a Monitor From the TS 1000 |
|
Timex/Sinclair 1000 |
| Driving a Monitor From the TS 1000 |
|
Timex/Sinclair 1000 |
| Driving a Monitor From the TS 1000 |
|
Timex/Sinclair 1000 |
| Eprom Burner Program |
Program to accompany the EPROM programmer described in Sinc-Link v2 n6. |
Timex/Sinclair 1000 |
| EPROM Programmer You Can Build, Part II |
Program to use the EPROM programmer with the TS1000/1500 along with details about cartridge format EPROM settings. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| EPROM Reader and Burner Uses |
Benefits and procedures for reading and burning EPROMs. |
Timex/Sinclair 1000 |
| EPROMS Are Alive and Well ... And Living in Redwood City |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| EPROMS Are Alive and Well... |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Error Codes: Revising a Hunter Board to Hold 32k |
Correction to “Revising a Hunter Board to Hold 32k” that appeared in T-S Horizons n19. |
Timex/Sinclair 1000 |
| Expand Your Timex/Sinclair Operating System |
Expansion card with 8K of battery-backed CMOS RAM in the 8-16K range. Part two. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Expand Your Timex/Sinclair Operating System |
Expansion card with 8K of battery-backed CMOS RAM in the 8-16K range. Part one. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Expanding RAM |
Replace the 1K RAM in the ZX81 with a 2K static RAM chip. |
Timex/Sinclair 1000 |
| Extended Problem |
|
Timex/Sinclair 1000 |
| Firmware Card |
Card to put a 2K or 4K EPROM anywhere in the memory map. |
Timex/Sinclair 1000 |
| Fix the ZX-81/TS1000 Loose Jack Problem |
|
Timex/Sinclair 1000 |
| George Erickson's Ultimate Loading Solution: Batteries |
UPDATES has devoted considerable space to improving loading speed convenience and dependability. Disk drives, stringy floppies, and fast load-type programs all contribute greatly to these critical factors. George Erickson, a manufacturer’s representative for Canon micro floppy drives, hard disks, and other computer equipment, uses ZX PRO/FILE to maintain his sales data. Since last November, his |
Timex/Sinclair 1000 |
| Get a Better Screen |
Several circuits for composite monitor signals from the ZX81/TS 1000. |
Timex/Sinclair 1000 |
| Getting More From Each Keystroke |
Hints on adding a full-size keyboard. |
Timex/Sinclair 1000 |
| Getting the LED Out |
|
Timex/Sinclair 1000 |
| Green and Black and Read All Over |
Connecting the ZX81 to a monitor. |
Timex/Sinclair 1000 |
| Hacker's Haven Presents: ZX-81 (and 2068) MIDI Interface Project, Part 2 |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Hacker's Haven Presents: ZX-81 MIDI Interface Project |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Hacker's Notebook: Joysticks |
|
Timex/Sinclair 1000 |
| Hacker's Notebook: TS 1000 Memory Expansion |
|
Timex/Sinclair 1000 |
| Happiness is a Converted T/S 1016 RAM That Works! |
Addition to two part article in Time Designs in 1986. |
Timex/Sinclair 1000 |
| Hardware Buys & Tips |
|
Timex/Sinclair 1000 |
| Hardware Hints |
Offers several solutions for preventing the ZX81 from overheating. |
Timex/Sinclair 1000 |
| Hardware Hints |
|
Timex/Sinclair 1000 |
| Hardware Project |
This circuit will simplify loading and saving programs by eliminating ground loop noise without the need to pull out the earphone plug during saving and the microphone plug during loading. |
Timex/Sinclair 1000 |
| Hardware Tip: Keyboard Conversion |
Use a DIP socket to create connectors for a keyboard conversion. |
Timex/Sinclair 1000 |
| Home Control on a Budget |
|
Timex/Sinclair 1000 |
| How I Made My Fullsize Keyboard |
Describes how to connect a surplus keyboard to a ZX81. |
Sinclair ZX81, Timex/Sinclair 1000 |
| How to Build an Inexpensive Joystick Interface |
Simple circuit and software to interface Atari joysticks to the 1000. |
Timex/Sinclair 1000 |
| How to Convert a Surplus WC2050 Modem into an RS-232 Serial Interface for your TS1000/1500/2068 |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| How to Convert a Surplus WC2050 Modem into an RS232 Serial Interface for your TS1000/1500/2068 |
|
Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Improving Timex/Sinclair Tape Loading |
Reduce troublesome dropouts and noise problems with a Z-Dubber. Schematic and PCB layout for the Z-Dubber is provided. |
Timex/Sinclair 1000 |
| Increase Your Memory |
Replace the internal RAM chip in a ZX-81 or TS 1000 with 8K static RAM. |
Timex/Sinclair 1000 |
| Input/Output: A Big Keyboard |
Instructions on interfacing a full-size keyboard to the TS 1000. |
Timex/Sinclair 1000 |
| Install A Reset Switch |
|
Timex/Sinclair 1000 |
| Installing a UHF Modulator |
|
Timex/Sinclair 1000 |
| Interface a Joystick to Your TS-1000 or ZX81 |
|
Timex/Sinclair 1000 |
| Interfacing a Real Printer to the Timex/Sinclair 1000 |
Author uses the CAI/O interface board to connect his upgraded MicroAce to an Okidata Microline 92. |
MicroAce, Timex/Sinclair 1000 |
| Interfacing An Electronic Typewriter to a ZX81 |
|
Timex/Sinclair 1000 |
| Interfacing Tips and Troubles: Interfacing the Sinclair Computers, Part One |
Introduction to interfacing the 1000, 1500, 2068 and a schematic for interfacing. |
Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Interfacing Tips and Troubles: Interfacing the Sinclair Computers, Part Two |
Basic and machine language routines for interfacing. Tri-state interface schematic. |
Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Interfacing Tips and Troubles: Memory Mapped I/O on the Sinclair ZX81 |
Memory-mapped IO on a Timex/Sinclair computer. |
Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Interfacing with Brother's EP44 Typewriter |
|
Timex/Sinclair 1000 |
| Internal 64K RAM for the TS/ZX |
Upgrade to 64K with a 43256 static RAM chip and some memory decoding. |
Timex/Sinclair 1000 |
| Introduction to Computer Control |
Introduction to using the TS 1000 as the basis for a robot. |
Timex/Sinclair 1000 |
| Just for Thought |
|
Timex/Sinclair 1000 |
| Keep Your Cool |
Techniques for improving cooling in the ZX81 and its RAM pack. |
Timex/Sinclair 1000 |
| Key Board Mania, Part 3 |
|
Timex/Sinclair 1000 |
| Keyboard Alternatives |
Alternatives to the Sinclair keyboard: overlays, beepers, full keyboards. Plans for wiring your own keyboard and list of keyboard alternative vendors provided. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Keyboard Conversions for ZX/TS |
Overview and how-to attach a full-size keyboard to a ZX81 or TS1000. |
Timex/Sinclair 1000 |
| Keyboard Interface for the TS1000 and the 2068 |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Keyboard Mania, Part 1 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 1 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 2 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 2 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 3 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 4 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 4 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 5 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 5 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Part 7 |
|
Timex/Sinclair 1000 |
| Keyboard Mania, Parts 6 & 7 |
|
Timex/Sinclair 1000 |
| Larken & Hunter |
Add a switch to the Hunter 8K memory board so it will work with the Larken DOS ROM, which occupies 12-16K region. |
Timex/Sinclair 1000 |
| Letter from Edward Loxtercamp |
Offers help to users who want to build his RS-232 interface. |
Timex/Sinclair 1000 |
| Load and Save Easier with LED VU Meter |
|
Timex/Sinclair 1000 |
| Machine Code Development System For Your Timex Sinclair 1000 |
Turn your Timex Sinclair 1000 or Sinclair ZX81 into a high-speed, machine-code development system. |
Timex/Sinclair 1000 |
| Machine Code Development System For Your Timex Sinclair 1000 Part II |
Turn your Timex Sinclair 1000 or Sinclair ZX81 into a high-speed, machine-code development system. |
Timex/Sinclair 1000 |
| Machine Code Execution Above 32K |
Execute machine code with addition of one chip to create new logic signal. |
Timex/Sinclair 1000 |
| Machine to Machine Transfers |
|
Timex/Sinclair 1000 |
| Machine to Machine Transfers |
|
Timex/Sinclair 1000 |
| Make Your Own 2068 & TS1000 EPROM Progammer |
Here is a project that will let you “burn” (program) EPROMS using your computer. It will handle either the 2764 type (8K bytes) or the 27128 (16K) EPROMs. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Making the 1000/ZX81 Even Better |
|
Timex/Sinclair 1000 |
| Making the T/S 1000 & ZX-81 Even Better |
|
Timex/Sinclair 1000 |
| Marathon Operating Times for the Timex-Sinclair |
Techniques for preventing overheading-related shutdown. |
Timex/Sinclair 1000 |
| MAX 1000: Make the Most Popular "Mods" Compatible On Your TS1000 |
Collection of upgrades/modifications to the 1000. |
Timex/Sinclair 1000 |
| Mem Saver |
|
Timex/Sinclair 1000 |
| Memopak RAM and TS 2040 Printer Compatibility |
|
Timex/Sinclair 1000 |
| MIDI |
|
Timex/Sinclair 1000 |
| Mini-Motherboard |
|
Timex/Sinclair 1000 |
| Mod to Use Hunter RAM with > 32K |
Hunter boards require a modification to work on systems with more than 32K RAM. |
Timex/Sinclair 1000 |
| Monitor Output for the TS-1000 & 1500 |
Schematics for adding monitor connectors to each computer. |
Timex/Sinclair 1000, Timex/Sinclair 1500 |
| More On-Board Memory For ZX-81/TS-1000 |
Options for internal memory upgrades to these computers. |
Timex/Sinclair 1000 |
| New Locations for M/C Routines in a 64K RAMpack |
Small hardware modification to allow machine code programs to run in the 32-48K RAM space. |
Timex/Sinclair 1000 |
| New Locations for M/C Routines in a 64K RAMPack |
|
Timex/Sinclair 1000 |
| New Locations for MC Routines in a 64K RAMpack |
|
Timex/Sinclair 1000 |
| Ni-Cad Charger |
Constant current charger for TS 1000. |
Timex/Sinclair 1000 |
| On Board Computer |
|
Timex/Sinclair 1000 |
| One Chip Mods |
Modify memory-mapped Byte-Back modules to work better with an expanded TS1000. |
Timex/Sinclair 1000 |
| One Chip Mods: Recycle that 16K RAM pack |
Instructions on how to alter a standard 16K RAM pack to work as 2 8K banks in the 8-16K region of the TS 1000. |
Timex/Sinclair 1000 |
| One Chip NVM Correction |
Improved schematic for design from July/August 1986 newsletter. |
Timex/Sinclair 1000 |
| One-Chip Mods: Built-in NVM |
8K RAM mapped to 8-16K region, internal to the computer. Compatible with Hunter board. |
Timex/Sinclair 1000 |
| PET ASCII Output Program for the Timex/Sinclair ZX81 |
This article describes a project which may be useful for anyone desiring to use software for the ZX81, TS1000 or TS1500 on a different computer. The program version presented here is designed to convert Sinclair BASIC programs into ASCII text which can be sent from the Sinclair computer to the serial port of a Commodore |
Sinclair ZX81, Timex/Sinclair 1000 |
| Poor Man's MODEM |
|
Timex/Sinclair 1000 |
| Poor Man's Modem |
|
Timex/Sinclair 1000 |
| Poor Man's Modem |
|
Timex/Sinclair 1000 |
| Port Project #1: Data Communications Between Two Computers |
This first project gives you the basis of a very useful application involving I/O ports–communicating between two computers. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Port Projects: Get the LED-OUT |
In any number of monitoring and/or control uses for your ZX/TS, you may find that using a TV set to check on your system is inconvenient or impractical. This would be so, for example, in outdoor or dirty environments or when you simply wish to check the status of one or two system parameters without |
Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 1500 |
| Power Supplies |
|
Timex/Sinclair 1000 |
| Pseudo-ROM |
|
Timex/Sinclair 1000 |
| Quick and Easy Video Output for the ZX81 and TS1000 |
|
Timex/Sinclair 1000 |
| RAM Pack Repairs |
|
Timex/Sinclair 1000 |
| RAMKIT: Build your own 64K RAM |
Build the RAM module with parts from Gladstone Electronics |
Timex/Sinclair 1000 |
| Repeat Key |
|
Timex/Sinclair 1000 |
| Reset Switch for ZX81 and 2068 |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Reverse Video |
|
Timex/Sinclair 1000 |
| Reverse Video Monitor Driver |
This circuit, using the concept published in Electronics, drives a video monitor and reverses video on demand. |
Timex/Sinclair 1000 |
| Revised Schematic of Digi-Dubber |
|
Timex/Sinclair 1000 |
| Revising a Hunter Board to Hold 32K Bank Switchable NVRAM |
With HM6264LP-I5 28 pin RAMS at less than $4 each, l have devised a not-too-difficult revision to a Hunter board which will give your ZX81/TS1000 four switchable 8K sections of write-protected NVRAM on the one board. |
Timex/Sinclair 1000 |
| ROMPAK |
The Rompak cartridge can instantly load programs, such as games or utilities, into memory. The cartridge is memory mapped in the unused 8 to 16k block of memory, and it has an expansion connector out the back, so it can be used with the T/S printer or ram pack. |
Timex/Sinclair 1000 |
| RS232 I/O Revisted |
|
Timex/Sinclair 1000 |
| Run TS1000 Machine Code in High Memory |
This trick was originally published in Syntax Quarterly, Summer 1983. It will allow you to use the 32-48K RAM area for machine code, if you have the Memotech or JLO 64 K boards (and maybe some others, but not the Byte-Back UM). |
Timex/Sinclair 1000 |
| Say What? |
Simple speech recognition hardware and program for ZX/TS computers (with at least 16K RAM). |
Sinclair ZX81, Timex/Sinclair 1000, Downloadable |
| Seeking a Cheap Output? |
This article describes how to construct your own simple and inexpensive output line. The project is ideal for low-end micro owners whose computers lack output ports. Interfacing techniques given for the Timex Sinclair using phototransistors and the TV. |
Timex/Sinclair 1000 |
| Signal Booster |
Use an audio transformer to boost tape signal. Reprinted from Sincus News, May/June 1986. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Signal Booster |
|
Timex/Sinclair 1000 |
| Simple Reset Switch |
Instructions and schematic for adding a debounced reset switch. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Simple Video Inverter for ZX81 |
|
Timex/Sinclair 1000 |
| Single-Key Shifted Functions |
Describes how to use diodes and integrated circuits to map a single key to a shifted-key function on the ZX81. |
Timex/Sinclair 1000 |
| Slave CPU Processing: Applicable to ANY Host Computer |
Discusses how to apply techniques described in “Interfacing to S-100/IEEE 696 Microcomputers” by Sol Libes and Mark Garatz to the Timex Sinclair 1000 and 2068. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| So You Wished You Had Bought a TS2000 |
How would you like to have a computer with a color video display of fifteen colors, quality sound, high resolution, unlimited character sets, and a dual joystick interface? How would you like a system in which you do not have to worry about expansion? If you have a ZX81 (or ZX80 with the 8K ROM), |
Timex/Sinclair 1000 |
| Sound Generator for the ZX 81 |
Three tone generator, one noise generator project. Reprinted from Electronics, Dec 1982 – Feb 1983 issue. |
Timex/Sinclair 1000 |
| Sound Generator for the ZX81 |
|
Timex/Sinclair 1000 |
| Spectrum Hardware Restart |
Photocopied from the March 1986 issue of Practical Electronics. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Spectrum Motherboard |
Create an expansion board for your computer. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| SQ-UP |
In David Ornstein’s premier issue article (SQ Winter 82 p. 29) Using Extra Keys on Big Keyboard, add a symbol A atop the D1 lead toward the right-hand edge of the page. |
Timex/Sinclair 1000 |
| Store BASIC on EPROM with an EPROM Programmer |
Construction article for an EPROM programmer for the ZX81/TS 1000. |
Timex/Sinclair 1000 |
| Super Data Save |
Construction tips and parts list for a load filter and software package for the ZX81/TS1000. |
Timex/Sinclair 1000 |
| Super Joystick |
Use readily available hardware to create a full-function joystick compatible with the ZX81. |
Timex/Sinclair 1000 |
| Surplus Keyboard Improvements for Extra Shifted Keys |
The TI 99-4A keyboards, still widely available, are an ideal unit for the ZX81/TS1000 computers. Recent and not so recent articles have shown how the shifted keys on the KB-0 line cam be connected using two diodes. This method can give you four useful and often used shifted keys: EDIT, DELETE, quotation marks, and FUNCTION. |
Sinclair ZX81, Timex/Sinclair 1000 |
| System Expansion Hardware |
System Enclosures and Radio Frequency Interference; an add-on expansion bus. |
Sinclair ZX81, Timex/Sinclair 1000 |
| T/S 1000 40K Non-Volatile Memory Expansion Project, Part II |
|
Timex/Sinclair 1000 |
| T/S 1000/ZX81 External Keyboard Buffer |
|
Timex/Sinclair 1000 |
| Tactile Feedback for a Dime |
|
Timex/Sinclair 1000 |
| Talk Can Be Cheap |
Interface a ZX80/81 or TS1000 to a Texas Instruments Speak & Spell. |
Timex/Sinclair 1000 |
| Tape Amplifier for Loading Weak Tapes |
Circuit diagram for an op-amp based signal booster. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Tape Amplifier for Loading Weak Tapes |
|
Timex/Sinclair 1000 |
| Tape Level Indicator |
Bar-graph level indicator using LM3914. |
Timex/Sinclair 1000 |
| Technical Tips for the Timex |
Add a repeat key to the TS1000. |
Timex/Sinclair 1000 |
| The "Truly Portable" Sinclair/Timex |
Powering a T/S 1000 from Polaroid SX-70 batteries and a simple reset switch circuit. |
Timex/Sinclair 1000 |
| The 192K ZX/TS Laptop Project |
|
Timex/Sinclair 1000 |
| The Amazing Digi-Dubber |
|
Timex/Sinclair 1000 |
| The Great RAM Rescue |
Remap the internal RAM to the 8K-16K block. For ZX/TS computers with a 16K RAM pack. |
Timex/Sinclair 1000 |
| The Great RAM Rescue |
Reprint of article from SYNC magazine. |
Timex/Sinclair 1000 |
| The Joy of Joysticks: Add This to "Repeat-Key!" |
|
Timex/Sinclair 1000 |
| The Portable Timex |
Reprinted from Computers & Electronics, August 1983. |
Timex/Sinclair 1000 |
| The Solid State Disk Drive (Part 3) |
Four part construction article on building an EPROM/SRAM storage device for the TS 1000. |
Timex/Sinclair 1000 |
| The Solid State Disk Drive (Part 4) |
Four part construction article on building an EPROM/SRAM storage device for the TS 1000. |
Timex/Sinclair 1000 |
| The ZX Breadboarder: A Proportional Joystick Interface |
|
Timex/Sinclair 1000 |
| The ZX Breadboarder: The Digi-Dubber |
|
Timex/Sinclair 1000 |
| The ZX-81/TS1000 Column |
|
Timex/Sinclair 1000 |
| The ZX/TS and 2716 450ns EPROMS |
You may run into trouble using 450ns 2716 EPROMs on your ZX/TS. |
Timex/Sinclair 1000 |
| The ZX/TS Serial Link |
|
Timex/Sinclair 1000 |
| The ZX/TS True 64K Internal NVM Upgrade |
|
Timex/Sinclair 1000 |
| The ZX81/TS1000 Column |
Replacing the VHF modulator. |
Timex/Sinclair 1000 |
| TI99 Keyboard |
So, you got one of those TI99 keyboards from Radio Shack for $2.95 and still have not wired it up to your 1000 or 2068, right? I was going to write this up a while ago, but I learned that so many different companies made the circuit boards that it would be difficult to give |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Tim's Schematic: ZX81/TS1000 Out-Board Clock Module |
|
Timex/Sinclair 1000 |
| Timex Graphics |
|
Timex/Sinclair 1000 |
| TMS9918A Video Upgrade For The TS1000 |
As can be expected with any major hardware upgrade, there are a few conflicts when the Oliger video system is used in conjunction with other equipment. Summarizes the fixes we and others have come up with to date. |
Timex/Sinclair 1000 |
| TMS9918A Video Upgrade: Part 1 |
The TMS9918A video project consists of two PC boards, a small modification/addition to the main computer board, and a +5, +12, -5 VDC power supply (an expansion board of some type is necessary). Video board “A” contains the TMS9918 VDP chip, 16K video ram and one support chip for I/O interfacing. Board “B” contains the |
Timex/Sinclair 1000 |
| TMS9918A Video Upgrade: Part 2 |
This second installment involves some explanation of the changes to the operating system and how they have been implemented. By actually placing the contents of the ROM on EPROM, you can change any routine, implement extra commands outside of the 8K ROM and have BASIC control of your new routines. It is only necessary to |
Timex/Sinclair 1000 |
| Tone Generator |
Generate tones on your ZX/TS by building this circuit and using a machine code routine with it connected. |
Timex/Sinclair 1000 |
| Truly Portable Computers |
Letter to the editor from a Polaroid employee, suggesting the P100 Polapulse Powerpack as an alternative to SX-70 batteries for making a Timex/Sinclair portable. |
Timex/Sinclair 1000 |
| TS 1000 Hardware Mod |
Small, single capacitor mod to potentially improve video signal on TVs. |
Timex/Sinclair 1000 |
| TS 1000 Keyboard Add-On |
Wire a keyboard to your TS 1000. |
Timex/Sinclair 1000 |
| TS 1000 Memory Expansion |
Mod to support adding a 2nd 16K RAM pack to the TS 1000. |
Timex/Sinclair 1000 |
| TS 1000 ROM Swap |
|
Timex/Sinclair 1000 |
| TS 1000 Signal Booster |
|
Timex/Sinclair 1000 |
| TS 1000 Stability Tips |
|
Timex/Sinclair 1000 |
| TS Help and Information: Modifications to Add-on Keyboard |
Add one-key shift-lock, delete and function keys to a TI keyboard converted for the 1000. |
Timex/Sinclair 1000 |
| TS-1000 Using 3 16K RAMPacks |
|
Timex/Sinclair 1000 |
| TS1000 Keyboard Addition |
|
Timex/Sinclair 1000 |
| TS1000 Monitor Project |
|
Timex/Sinclair 1000 |
| TS1000 Pulse Cleaner |
|
Timex/Sinclair 1000 |
| TS1000 RAM Pack Upgrades |
|
Timex/Sinclair 1000 |
| TS1000 Turbo |
|
Timex/Sinclair 1000 |
| TS1000 Turbo |
|
Timex/Sinclair 1000 |
| TS1000 Turbo |
|
Timex/Sinclair 1000 |
| TS1000 Turbo |
Add a switch to add “turbo” mode to the TS1000. |
Timex/Sinclair 1000 |
| TS1000 Video Driver |
|
Timex/Sinclair 1000 |
| TS1000 Video Driver Update |
|
Timex/Sinclair 1000 |
| TSMON |
|
Timex/Sinclair 1000 |
| Turbo Switch for the ZX81 |
Transcribed from the Winter 1993 issue of ZXir QLive Alive. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Two Memories in One Space |
Simple solution to multiplex the 8k-16k memory space. |
Timex/Sinclair 1000 |
| Two Switch Human Interface for the Communicative Impaired |
The program will usually display three rows of characters on the screen at any lime: the upper alphabet (UA) row, the lower alphabet (LA) row, and the message row. which will be empty at first. The program allows the user to select letters from the alphabet rows for display in the message row. |
Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000 |
| Understanding and Upgrading The TS1016 RAM Pack |
This is the second part on upgrading your TS 1016 RAM pack to 64k. Last issue we discussed the ins and outs of dynamic memory and how the Sinclair RAM pack works. |
Timex/Sinclair 1000 |
| Upgrading T/S Video |
Correction to “Upgrading Timex-Sinclair Video” in the May 1983 issue to address a revision to the ZX81 circuit. |
Timex/Sinclair 1000 |
| Upgrading Timex/Sinclair Video |
Provides direct video and white-on-black screen characters. |
Timex/Sinclair 1000 |
| Upgrading to a "Real" Keyboard: E-Z Key Makes It Easy |
Schematic to add a keyboard that plugs into the expansion port. This is the same interface that is used in the E-Z Key 60. |
Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| User Defined Graphics for the TS-1000 |
|
Timex/Sinclair 1000 |
| User Defined Graphics for TS-1000, Part II |
Program to generate and store your own characters into the custom graphics board as described in the prior month’s issue. |
Timex/Sinclair 1000 |
| Using Extra Keys on Big Keyboard - A Simpler Approach |
Connections to map a single key to replace two keystrokes. |
Timex/Sinclair 1000 |
| USR Key |
|
Timex/Sinclair 1000 |
| Vector Graphics |
Hardware and software to drive a vector display. |
Timex/Sinclair 1000 |
| Voice Reproduction |
Machine language tools to sample and playback voice recordings. |
Timex/Sinclair 1000 |
| WRX 16 Hi-Res for the 1000 |
For several years, ZX81/TS1000 owners have dreamed of a simple bit-mapped high-resolution system for their machines. The quest began with the appearance of “software-only” high-resolution packages, which offered an improvement over the crude 44×64 block pixels, but left much to be desired regarding precision and ease of use. Several manufacturers came out with hardware add-ons |
Timex/Sinclair 1000 |
| Your Timex/Sinclair Can Become a Terminal |
Build a 8251 USART interface to connect a Sinclair to a modem. |
Sinclair ZX81, Timex/Sinclair 1000 |
| Z80 LCD |
|
Timex/Sinclair 1000 |
| ZEX for the ZX81 |
|
Timex/Sinclair 1000 |
| ZVOICE |
Like many of you, I have been fascinated by the idea of speech synthesis. I even bought a GI SP0256 chip only to have it sit on a shelf, silently gathering dust. After all you need a robot or I/O board to make it work, right? Meantime others were having fun and contributing to the |
Timex/Sinclair 1000 |
| ZVoice |
Reprint of ZVOICE. |
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| ZVOICE Part 2 |
Listing 4 shows how a text to speech program can be implemented. A text string is scanned one word at a time, with “spaces” as separators. If the word is in the vocabulary, then the word is spoken; if not found, phonetic pronunciation of the word, or the phrase “WORD UNKNOWN” is spoken. New words |
Timex/Sinclair 1000 |
| ZX Analogue-to-Digital Converter |
Fast eight-bit analog to digital converter project. |
Sinclair ZX Spectrum, Timex/Sinclair 1000 |
| ZX Burglar Alarm |
|
Timex/Sinclair 1000 |
| ZX Burglar Alarm |
|
Timex/Sinclair 1000 |
| ZX Resources |
Parallel interface using the Z80 PIO chip. |
Timex/Sinclair 1000 |
| ZX Resources: RS232 I/O |
|
Timex/Sinclair 1000 |
| ZX Resources: Transferring Between Computers |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| ZX-81 Computer Joystick |
Describes how to connect a joystick, includes demonstration program. |
Timex/Sinclair 1000 |
| ZX-EPROMer |
|
Timex/Sinclair 1000 |
| ZX/TS Repair Guide - Part II |
Tips on repairing the ZX81/TS 1000. |
Timex/Sinclair 1000 |
| ZX/TS ROM and RAM Addressing |
Investigation into PEEKing and POKEing outside the 16K-32K address range and how to use a 74LS138 to decode RAM in the 16-32K range. |
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX/TS True 64K Internal NVM Upgrade |
|
Timex/Sinclair 1000 |
| ZX81 & QL Regulator Bug |
Suggested solutions to power regulation problems in the ZX81/TS1000 and QL: add capacitors. |
Sinclair QL, Timex/Sinclair 1000 |
| ZX81 Data Acquisition Module |
A/D converter for the TS/ZX using the TLC548. |
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Data Acquisition Module |
Part two of series on building a digital-to-analog converter. |
Timex/Sinclair 1000 |
| ZX81 Direct Video Output |
|
Timex/Sinclair 1000 |
| ZX81 EPROM Board |
Schematic for interfacing an EPROM, static RAM or SEEQ’s 2K EEPROM to the ZX81/TS 1000. |
Timex/Sinclair 1000 |
| ZX81 EPROM Board |
Board layout, parts list and program listings. Continued from Sinc-Link v6 n1. |
Timex/Sinclair 1000 |
| ZX81 Loading Filter/Interface |
Op-amp based load filter schematic and construction details. |
Timex/Sinclair 1000 |
| ZX81 RAMpack Expander |
|
Timex/Sinclair 1000 |
| ZX81 Resources |
1mb Bank-Switched Memory Board. |
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Resources: 1mb Bank-Switched Memory Board |
|
Timex/Sinclair 1000 |
| ZX81 Resources: 64K SRAM Memory |
|
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Resources: A Tethered Robot |
|
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Resources: Analogue to Digital Converter |
|
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 Resources: Joystick |
|
Timex/Sinclair 1000 |
| ZX81 Resources: Joysticks |
|
Sinclair ZX81, Timex/Sinclair 1000 |
| ZX81 ROM Adapter 2764 EPROM to Replace Sinclair ROM |
Schematic to connect an EPROM in place of the ROM. |
Timex/Sinclair 1000 |
| ZX81 Tape Controller |
|
Timex/Sinclair 1000 |
| ZX81/TSXXXX Out-Board Real-Time Clock |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
| ZX81/TSXXXX Out-Board Real-Time Clock |
|
Timex/Sinclair 1000 |
| ZXVoice |
|
Timex/Sinclair 1000, Timex/Sinclair 2068 |
