TS 2068: Hardware Projects
Hardware projects in computing magazines and user group newsletters represented the physical counterpart to type-in programs. These DIY ventures allowed computer enthusiasts to enhance their systems through custom-built hardware modifications and peripherals.
Publications like Byte, Radio-Electronics, and user group newsletters featured detailed schematics, parts lists, and step-by-step assembly instructions. Projects ranged from practical upgrades like memory expansions to specialized peripherals such as digitizers, speech synthesizers, and custom input devices.
| Title | Description | Computers |
|---|---|---|
| 12 Volt Modification | Reprinted from Jan/Feb 1990 ISTUG newsletter. | Timex/Sinclair 2068 |
| 12 Volt Modification | Timex/Sinclair 2068 | |
| 12 Volt Modification | Replace the 78L12 voltage regulator with a larger capacity model for better power regulation and improved video. | Timex/Sinclair 2068 |
| 12 Volt Modification | Timex/Sinclair 2068 | |
| 2068 & Spectrum Customized ROMs | Short article on author’s customized ROMs and brief description of how to create one’s own. | Timex/Sinclair 2068 |
| 2068 Cassette Connection, Part II | Hints and schematics for improving loading. | Timex/Sinclair 2068 |
| 2068 Cassette Connection, Part II | Timex/Sinclair 2068 | |
| 2068 Cassette Connection: Part II: Loading Tips | In the last issue, I recommended removal of a couple capacitors in the SAVE circuitry of the TS2068. This provides a “brighter” save signal, which makes subsequent loading more reliable. This is all that is required to get many systems working “up to spec,” and makes the use of “fast-load” routines possible, even practical. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| 2068 Colour Adjustments | Short program to print color bars and instructions for adjusting the color output. | Timex/Sinclair 2068 |
| 2068 Digitizer | Adapts an idea by Forrest Mims to digize images using a plotter and photo transistor. | Timex/Sinclair 2068 |
| 2068 Fix Star NX-1000/Aerco Centronics I/F Fix | Timex/Sinclair 2068 | |
| 2068 Fix Star NX-1000/AERCO Centronics I/F Fix | Fix to accommodate STROBE line requirement of Star NX-1000 printer. | Timex/Sinclair 2068 |
| 2068 Fix Star NX-1000/AERCO Centronics I/F Fix | Fix to accommodate STROBE line requirement of Star NX-1000 printer. | Timex/Sinclair 2068 |
| 2068 LOAD Notes | Timex/Sinclair 2068 | |
| 2068 Power Supply - Make It Cooler & Quieter | I have discovered that programs SAVED to cassette tapes from the TS-2068 can have a very high Noise/Scratch background level making verification and loading a somewhat iffy proposition. The best way to determine if you have this problem is to monitor the signal on the tape aurally during loading. | Timex/Sinclair 2068 |
| 2068 Power Supply Problem? | From my own personal experience and information gleaned from articles, it is clear that the method of powering the 2068 has serious problems. My solution to these problems is to provide a husky linear power supply to the computer, printer and accessories. | Timex/Sinclair 2068 |
| 2068 Power Supply Project | Timex/Sinclair 2068 | |
| 2068 Power Supply: Make It Cooler & Quieter | Timex/Sinclair 2068 | |
| 2068 Power Supply: Make It Cooler & Quieter | Timex/Sinclair 2068 | |
| 2068 Power Supply: Make It Cooler & Quieter | Timex/Sinclair 2068 | |
| 2068 Power Supply: Make It Cooler & Quieter | I have discovered that programs SAVE’d to cassette tapes from the TS-2068 can have a very high noise/scratch background level making verification and loading a somewhat iffy proposition. The best way to determine if you have this problem is to monitor the signal on the tape aurally during loading. | Timex/Sinclair 2068 |
| 2068 Printer Interface and ROM Card | This month I finish up my series on the printer interface with the circuit board layout and simple print driver software. In reconfiguring the layout to include the ROM interface, I had to rearrange things a bit, so here is the final version of the schematic showing the new pin configuration. | Timex/Sinclair 2068 |
| 2068 Printer Interface and ROM Card | This month I finish up my series on the printer interface with the circuit board layout and simple print driver software. In reconfiguring the layout to include the ROM interface, I had to rearrange things a bit, so here is the final version of the schematic showing the new pin configuration. | Timex/Sinclair 2068 |
| 2068 ROM Bypass Board Schematic, Revised | Enclosed are copies of “ctas.Bl” v9.2. If you have sent copies of the previous version to anyone and happen to have a record of who, send me his name and address and I’ll mail him the latest version. Also enclosed is a schematic of ray working version of Bill’s ROM/EXROM bypass board. | Timex/Sinclair 2068 |
| 2K-SDP: A Serial Data Port | A system which allows transfer of data between ZX/TS and ТS2068 computers and cassette tape operations in TS2068 format. | Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| 32K RAM | 32K RAM in the cartridge port for Timex Portugal Disk Drives. Spectrum Emulator The Spectrum code can be loaded into RAM and then Spectrum programs run from disc. The pull-up resistors are needed for some Spectrum games. Jack Dohany’s dual Interface is needed to load Spectrum programs. | Timex/Sinclair 2068, Type-in program |
| A Broken 2068? Fix It Yourself! | IMPORTANT NOTE: The following article describes a method of testing for, and repairing a Timex Sinclair 2068 with bad RAM chips. Though it is a simple project that most people with basic soldering skills are capable of completing, and the information presented here is believed to be correct, the author and publisher take no responsibility | Timex/Sinclair 2068 |
| A Comparator to Use on Bad 2068 Tapes | The program loading end saving process on the TS2068 is e great improvement over the TS1000. The signal recorded is a series of square pulses, with ones shorter than zeros. There is no DC component and reversing plus and minus has no important effect. | Timex/Sinclair 2068 |
| A Cursor Pad | A neat way of selecting from a menu or a collection of items on the screen is to move the cursor to the desired item. There is nothing new about this idea:- many games and commercial programs use this tequnique. | Timex/Sinclair 2068, Type-in program |
| A JLO FDD Interface Hardware Project | My system consists of a TS-2068 with a JLO Disc Interface with a 5.25 inch drive and a pair of Amdek 3 inch drives. I have found that I cannot transfer the contents of the larger discs to the smaller drive or vice versa. | Timex/Sinclair 2068 |
| A Keyboard Interface for Any Timex Computer | For those who do not wish to go into their computer to connect a new keyboard, here is an interface which you can plug on to the rear expansion buss. You can easily add on one of those TI surplus keyboards which are selling for as low as five dollars. | 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-B Boxes and other Ramblings | DIY switch boxes for disk drives. | Sinclair QL, Timex/Sinclair 2068 |
| Activating the NMI on TS2068 | In the July ’85 LIST, mention was made of a special SIG meeting in which member-designed hardware was demonstrated. In that meeting I demonstrated a hardware tracer for the TS2068. The tracer specs. were drawn by me, and I supervised two of my associates in the design and testing. | Timex/Sinclair 2068 |
| Adapting the TI Keyboard to the 2068 | I feel that as 2068 users, we have been supported very well, considering our fate. But still, I have longed for a professional keyboard…I decided to adapt one myself. I hope these notes will help anyone else wanting the same. This project is relatively easy, just time consuming. | Timex/Sinclair 2068 |
| 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 |
| Adapting the ZX81 RAMpack to TS2068 | Timex/Sinclair 2068 | |
| Add RGB to Your 2068 | RGB on the 2068 is probably one of the most gratifying additions you can get. The problem is that there is no simple way to do it and few companies (if any) have any to sell. | Timex/Sinclair 2068 |
| Add serial port to your Sinclair | It is time for another hardware project: this time a serial interface, for the ZX81, 2068 (and I believe the SPECTRUM). The design is fully hardware and software compatible with the popular TS2050 (TIMEX) modem. As usual, I tried to keep the circuit as simple as possible to make it easy to construct. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Addendum to Article in January Update "Dock Bank Memory, 20 Cents" | Corrected diagram. | Timex/Sinclair 2068 |
| Adding a Joystick For the Spectrum/2068 | Having converted your 2068 to Spectrum mode of operation, you will find that most British software can be operated successfully from the keyboard, but a joystick might make life a little easier. While the joystick ports may be successfully accessed by the appropriate IN commands, this is of little use for commercial software. | Timex/Sinclair 2068 |
| Adding a TTL Monitor to Your TS-2068 | Timex/Sinclair 2068 | |
| Adding a TTL Monitor to Your TS-2068 | Timex/Sinclair 2068 | |
| Adding a TTL Monitor To Your TS-2068 | Timex/Sinclair 2068 | |
| Adding Dimension in 2068 Computing ... Using a Plotter | The versatile TS 2068 computer never ceases to amaze me on its capabilities. Each of us has a pet application for their computer; mine is information and productivity. Here, I define productivity as the use of skills and resources to maximize output of a deliverable item. | Timex/Sinclair 2068, Type-in program |
| Adding RGB to Your 2068 | Instructions and schematic to connect 2068 to TTL RGB monitor. | Timex/Sinclair 2068 |
| Adding RGB to Your 2068 | Timex/Sinclair 2068 | |
| Adding RGB to Your 2068 | RGB on the 2068 is probably one of the most gratifying additions you can get. The problem is that there is no simple way to do it and few companies (if any) have any to sell. | Timex/Sinclair 2068 |
| Adding Two More Drives | Add two more drives to a Larken system. | Timex/Sinclair 2068 |
| Adding Two More Drives | Timex/Sinclair 2068 | |
| AERCO Parallel Printer Interface Case | Timex/Sinclair 2068 | |
| An Easy Improvement for Your TS-2068 Keyboard | Timex/Sinclair 2068 | |
| An RGB Monitor for the TS2068 | I purchased a Model No. 4084 TV/ monitor from Sears ($364.00 including tax) together with RGB Cable Model 6529 ($18.00). I had to modify my computer using an RGB Conversion kit #220-453 from Arthur Brown Co., 1702 Oak Knoll Drive, Alexandria MN S6208 ($19.95). This kit requires opening the computer and doing some soldering inside. | Timex/Sinclair 2068 |
| And Now For Something Completely Different | Print 2068 images to an OKIMATE 10 or 20 printer; transfer those images to clothing. Requires either McMichael’s Commodore interface or an Okimate with IBM parallel interface. | Timex/Sinclair 2068 |
| 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 2068 Color Monitor Adapter | RGB monitor interface using a transistor and integrated circuit (74LS04). | Timex/Sinclair 2068 |
| Another Approach to Extra Memory Banks | Back in ’86 I was faced with a problem with memory. I had a program in which I stored and sorted movie titles, updating it each month. As the list approached 1000, it was obvious that RAM would soon be full and extra banks of memory were needed. | Timex/Sinclair 2068 |
| Audio Transformer Load Aid | Timex/Sinclair 2068 | |
| Bankswitched RAM on the TS2068 and Spectrum | Timex/Sinclair 2068 | |
| Better RGB Circuit | Timex/Sinclair 2068 | |
| Better RGB Circuit | Timex/Sinclair 2068 | |
| Better RGB Circuit | The circuit described in the February 1986 issue of SUM was designed around the Sears RGB/TV/Monitor (same as the Sanyo model # 31C426) and the Magnavox (NAP) RGB-40 or 80. Both of these monitors (and the QL monitor as well) take negative-going composite sync and active high RGB signals and have well buffered inputs to clean up any poor inputs. | Timex/Sinclair 2068 |
| Better Sound | To increase the volume of SOUND on the 2068, try this little circuit. Circuit placement is not critical, but try to keep the signal lead as short as possible. In place of the #4B connection, you can use a 9 volt battery. | Timex/Sinclair 2068 |
| Big Keyboard 2068 | A circuit diagram for a “Keyboard Interface Circuit” is printed below. The construction method is your choice. (A PC Board for the cartridge slot is a nice idea) I have not included details on re-wiring a keyboard (see March 85 Listing Pg. 18), but used the connection names used in the March issue. | Timex/Sinclair 2068 |
| Bordure Psychedelique? | Short program to generate multicolor border effects. | Timex/Sinclair 2068 |
| Brother EP-44 to Sinclair IF One | Timex/Sinclair 2068, Type-in program | |
| Build a 2068 Cartridge Board | In SWN 2/4 and 2/5, I discussed the construction of an eprom programmer for the 2068 and 1000. Those of you with 2068’s should find interest in a way to utilize programs that are burned onto those eproms. | Timex/Sinclair 2068 |
| Build A Computerized Anemometer Using The Experimenter's I/O Port | This project is the first in a series of articles which will chronicle my ongoing experiments in the development of a low-cost completely computerized weather station making use of TS computers, the Experimenter’s Universal Input/Output Port, and a collection of common household items. I think you will enjoy following my trials and tribulations. | Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| Build a Spectrum ROM Switching Circuit For Your TS-2068 | I recently purchased some Spectrum ROMs from Zebra Systems with the hope that I might be able to make my own Spectrum ROM switching circuit without paying the high price of those circuits that are commercially available. | Timex/Sinclair 2068 |
| Build a Spectrum ROM Switching Circuit for Your TS2068 | I recently purchased some Spectrum ROMs from Zebra Systems with the hope that I might be able to make my own Spectrum rom switching circuit without paying the high price of those circuits that are commercially available. | Timex/Sinclair 2068 |
| Build a Spectrum Romswitching Circuit for your TS-2068 | Timex/Sinclair 2068 | |
| Build a Spectrum ROMswitching Circuit for Your TS-2068 | Timex/Sinclair 2068 | |
| Build a Spectrum ROMswitching Circuit for Your TS-2068 | Timex/Sinclair 2068 | |
| Build a Spectrum Romswitching Circuit for your TS-2608 | Timex/Sinclair 2068 | |
| Build this Super Simple Modem | Short article and program on interfacing directly to the telephone line via the MIC jack. Program uses BEEP command to generate necessary tones. | Timex/Sinclair 2068, Type-in program |
| Building an RS-232 Port into the 2050 Modem | Step-by-step guide to adding a Zebra Systems RS-232 circuit board inside the TS2050 modem case, selectable via a 3PDT mini-switch mounted in the back panel. Rather than housing the circuit in a separate external box, Latker drills into the modem case, cuts PCB traces, adds jumper wires to pins 3, 17, and 22 of the 8251 UART, and wires directly to a Break-out Adapter (Dick Smith Electronics). | Timex/Sinclair 2068 |
| Byte-Back RS-232 and Tasword Two | Timex/Sinclair 2068, Type-in program | |
| ByteBack to Interface 1 RS-232 | Timex/Sinclair 2068 | |
| Can We Talk? On Communicating Computers | While there have been reams of information published on various types of interface for the TS2068, the lowly RS-232 port has been almost ignored. This is in spite of the fact that many hardware products contain an RS-232 interface as an “extra”, like the Sinclair Interface One, and the Timex Portugal disk drive. | Timex/Sinclair 2068, Type-in program |
| Cassette Connection Comments | Timex/Sinclair 2068 | |
| Centronics Printer Port - AERCO Style | Schematic for a parallel printer interface using the Zilog Z80-A parallel input/output chip (PIO). | Timex/Sinclair 2068 |
| Cheap 32K RAM Add on For The 2068 | This circuit will add 32k of RAM to a 2068 for about $25.00. It can be installed without removing the circuit board from the lower half of the case. The RAM occupies the upper half of the dock bank from 32768 to 65535. | Timex/Sinclair 2068 |
| 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 Circus | Sinclair QL, Timex/Sinclair 2068 | |
| Color Blind to Colorful | I have had four color blind TS 2068’s. The first one I sent to Timex Little Rock Repair Center and was sent another 2068. I electrocuted that 2068 and sent it to TS Connections in Cincinnati. It was returned to me with a memo to give it a decent burial. | Timex/Sinclair 2068 |
| Computer Repairs | Tips for repairing the TS 2068. | Timex/Sinclair 2068 |
| Computer Tip for the Sinclair Line | Hardware tip recommending replacement of LS-series TTL ICs with HCT or HC CMOS equivalents in the Timex/Sinclair 2068 expansion bus to reduce current draw and prevent bus overload. Explains the root cause of expansion bus instability. | Timex/Sinclair 2068 |
| Computer Weather Station: Part 2 Tell Which Way The Wind Blows | In the last issue’s “anemometer” article, I showed how to build a simple but effective (and cheap) device to tell how fast the wind blows. Now, I will carry on with plans for an equally important device to determine wind direction. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Connecting an RGB Monitor | Describes how to connect an RGB monitor using a kit from E. Arthur Brown. | Timex/Sinclair 2068 |
| Connecting The Amdek Amdisk III to the Zebra FDD 3000 | Timex/Sinclair 2068 | |
| Conversion 2068 to Spectrum | Adapt your 2068 to run Spectrum software. | Timex/Sinclair 2068 |
| Converting the Oliger 64K Ram for the 2068 | To use the JLO 64 K RAM board (from the TS1000) on the 2068, it is necessary to make these changes. | Timex/Sinclair 2068 |
| Converting Your 2068 to a Spectrum | Sinclair ZX Spectrum, Timex/Sinclair 2068 | |
| 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 |
| Customize Your 2068 Keyboard | If you have a full-sized printer you might appreciate this circuit which generates the series of characters for the ESC escape control code – CHR$27; – with one keystroke. The circuit can be implemented if you use 4066’s to interface the keyboard with the computer. Here’s how Figure 1 works. | Timex/Sinclair 2068 |
| Dead Key Row | Timex/Sinclair 2068 | |
| Decoding the EXROM | The following circuit will allow you to use the memory area above the EXROM, which occupies the 0 to 8K chunk in that memory bank, as RAM. Cut the traces from pin 22 of the Exrom (mreq) and install the circuit in Figure 1. | Timex/Sinclair 2068 |
| Did You Know? | Schematic for an AERCO style printer interface. | Timex/Sinclair 2068 |
| Digital Imaging Hardware Project, Part I | Reprint of Eric Michaud’s Digital Imagizing, Part I from Sinc-Link v5 n1. | Timex/Sinclair 2068 |
| Digital Imaging II | Reprint of the original, with modified schematic and example scan showing Toby Radloff and Harvey Pekar. Reprinted from the Cleveland, OH, user group newsletter, The RAMTOP, which reprinted from Sinc-Link. | Timex/Sinclair 2068 |
| Digital Imagitizing, Part 1 | Have you ever wanted to have some REAL pictures for your 2068? 1 don’t mean your usual pictures from your typical drawing programs but real pictures, such as your face, for example. This tutorial will show you how to hook up a video camera to your 2068 with a fairly simple hardware attachment. | Timex/Sinclair 2068 |
| Digital Imagizing Part II | Second part of a video digitizer hardware project series for the Timex/Sinclair 2068. Provides a corrected schematic addressing errors from Part I, with additional circuit details. Article is truncated at end of issue. | Timex/Sinclair 2068 |
| Digital Imagizing, Part 1 | Reprint of Eric Michaud’s Digital Imagizing, Part I from Sinc-Link v5 n1. | Timex/Sinclair 2068 |
| Digital Imagizing, Part 2 | Hopefully by now you have assembled the hardware involved in this project and have obtained the necessary driver software from the club library. The software I have written allows you to do high-contrast scans, grey-scaling (the combining of several images giving one picture with varying shades of grey representing the different colours), cleaning of noise in the image, flips, inversions, and cut and pasting from one image to another. | Timex/Sinclair 2068, Type-in program |
| Digitizer | Timex/Sinclair 2068 | |
| Do It Yourself Emulator | You will need a piece of perf-board, about 2 inches by 1 inch, holes on .100 center, two 10K ohm resistors, one . 1 MFD capacitor, one single pole double throw switch, 5 feet wire wrap 30ga. Remove the TIMEX ROM, making sure not to remove the EXROM (see drawing), and place on non-conductive foam. | Timex/Sinclair 2068 |
| 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 |
| Easy Keyboard Fix | Fixing the TS 2068 space bar. Reprint from Clackamas County Area T/S User Group | Timex/Sinclair 2068 |
| Easy Keyboard Fix | The 2068 computer has a poorly designed space bar as usually the right hand end does not produce a space when pressed. I have explained to users about how to make a fix by disassembling the keyboard and inserting spacers between the hinge arms and the case to slightly lower the space bar and reduce its travel. | Timex/Sinclair 2068 |
| Emergency Power for the 2068 | You never notice how often the power goes off until you start fooling around with computers. A great majority of power interruptions go unnoticed in normal every day living. Unfortunately, that computer notices every one. The reaction is always the same. | Timex/Sinclair 2068 |
| EMU-1 Spectrum Emulator | Timex/Sinclair 2068 | |
| EPROM Programmer You Can Build, Part 1 | Timex/Sinclair 2068 | |
| EPROM Programmer You Can Build, Part 2 | Timex/Sinclair 2068 | |
| EPROM Programmer You Can Build, Part II | To use the EPROM programmer discussed last month with the TS 1000/1500, you need to use the program listed here. Because the 1000/1500 does not have IN or OUT, a couple of short machine code routines appear in the REM statement of line 1. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| EPROM Programmer, Part II: Fixing Your Home ROM | The programs of listings 1 and 2 in Part 1 got you programming 27128’s on the standard TS2068 computer with the supplied home ROM (U16). There IS, however, another way to get around the problem which is much better in the long run, if you plan on programming very many 27128 EPROMs. | Timex/Sinclair 2068, Type-in program |
| 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 in simple Sound Port | Correction to the schematic. | Timex/Sinclair 2068 |
| Esc Key | Timex/Sinclair 2068 | |
| Escape Key | Timex/Sinclair 2068 | |
| Escape Key Boo Boo | Timex/Sinclair 2068 | |
| Extra Memory Programming | Most of us can visualize the computer's "regular" memory. We know that the ROM part of memory has "fixed" machine programming put there by Timex when they built the computer, and that there Is a section called RAM that we store our own programs in. | Timex/Sinclair 2068, Type-in program |
| Fixing My FDD3000 | Timex/Sinclair 2068 | |
| Foote Interface Fix | I recently purchased a FOOTE interface for my Seikosha SP-1000A printer. It now allows me to use TECH-DRAW, BANNER and other AERCO and TASMAN B & C interface software. It also allows you to mount the Emulator chip such as Doug Dewey’s EMU, or other ROM based software. | Timex/Sinclair 2068 |
| Forum: Spectrum Compatibility | I’m sure that you are all aware by now that it is possible to run most Spectrum programs on a 2068. Some will run without modification and some will not. As indicated in the last issue (Games review, SWN 2/3), if a program stops due to an illegal RAMTOP (too low), then changing the CLEAR | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| Frequency Counter | Timex/Sinclair 2068, Type-in program | |
| From the Project Table | Interfacing an Atari trackball to the 2068. | Timex/Sinclair 2068 |
| Fun With Hardware Part I - The Platform | Homebrew memory and IO expansion device for the 2068. | Timex/Sinclair 2068 |
| GAMESMATE Fix | Fix to fully decode the GAMESMATE Kempston compatible joystick interface so it doesn't conflict with other peripherals. | Timex/Sinclair 2068 |
| GAMESMATE Fix | Fix the minimally-decoded Kempston adapter to with more limited IO range. Only one address line (A5) is decoded in the Kempston; this fix adds A6 and A7 to limit its range of IO ports. | Timex/Sinclair 2068 |
| Gavilan Printer Interface | Timex/Sinclair 2068 | |
| Getting More From Your 2050 Modem | Timex/Sinclair 2068, Type-in program | |
| 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 | |
| Hackers Note Book: Atari Keypad on 2068 | The attached page one gives the schematic for the ATARI Key pad and 2068 joystick (a fairly standard joystick configuration). Note that line 8, STB 1s the one key pin missing from the key pads plug. This makes the pad useless as a simple input device. Still, there are several inexpensive ways around this problem. | Timex/Sinclair 2068, Type-in program |
| Hackers Notebook: Atari Key Pad | Timex/Sinclair 2068 | |
| Hardware Project: EPROM Programmer You Can Build | The cartridge dock of the 2068 was Supposed to open up a whole new dimension in instant loading software when Timex introduced it oh so long ago. There were very few cartridges available and what was wasn’t worth it. Then came along Doug Dewey’s Spectrum emulator which made excellent use of it. | Timex/Sinclair 2068 |
| Hardware Review: Data-Skip VIDEOFACE | Timex/Sinclair 2068 | |
| Home-made 2068 LarKen Disk Interface | Instructions for building a Larken 2068 disk interface. | Timex/Sinclair 2068 |
| How to Build a Larken Dock Board | How to make a dock cartridge board. | Timex/Sinclair 2068 |
| How To Connect An IBM Keyboard To Your Timex 2068 | This article shows you how you can use a full size IBM compatible keyboard with your computer and create a new channel to link it to your own Basic programs. My new cartridge version of Pro/File 2068 has the software part of this project built into the cartridge, and it can be used with any Basic program–not just with Pro/File. | Timex/Sinclair 2068, Type-in program |
| 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 | The purpose of this article is to show you how, with the addition of a few inexpensive components, you can convert a WC2050 modem board into a general purpose RS232 serial interface. In October of last year, Anchor Automation auctioned off several thousand completely assembled WC2050 Modem boards as electronic surplus. | Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| How to Make Music with the TS 2068, Part 1 | NOTE:The Pro Shop is a regular fea- to provide advanced concepts to the seasoned TS computer programmer. As we continue on through the different issues of our magazine, we will touch on a variety of topics including comprehensive machine programming. | Timex/Sinclair 2068 |
| I/O Ports: Centronics Port | Timex/Sinclair 2068 | |
| IEEE-488 for Sinclair Users | It is not widely known that the COMMODORE serial port is a simple form of the IBEE-488 GPIB with serial data transfer in place of parallel. It holds no mysterious secrets. What is needed to do the same with a TS2068, SPECTRUM, or QL is a half way decent interface. | Timex/Sinclair 2068 |
| Improved TS-2068 Internal ROM Bypass I | A major barrier to fixing the problems in INTERNAL ROM is one of access Even though the ROM is socketed, you still have to open the case This risks damage, and even then, replacing ROM with EPROM requires wiring modifications This article shows how to replace HOME ROM and EXROM without touching a screw. | Timex/Sinclair 2068 |
| Improved TS2068 Internal ROM Bypass | Timex/Sinclair 2068 | |
| Improved TS2068 Internal ROM Bypass | Detailed hardware design for replacing the TS2068’s HOME ROM and EXROM without opening the computer case, using the cartridge slot to intercept the bus enable (BE) signal. Three designs: HOME ROM bypass (Figure 1) using BE-driven suppression of ROMCS in combination with external ROM/RAM; EXROM relocation (Figure 2a) by physically remounting the chip with full | Timex/Sinclair 2068 |
| Improving the Spectrum Emulator EMU | Adding pull-up resistors to a Spectrum emulator cartridge. | Timex/Sinclair 2068 |
| Improving the Zebra Graphics Tablet | Users of the Zebra Graphics Tablet will have no doubt noticed the annoying behavior that I will term “Spray”. If you don’t press the stylus against the tablet very firmly, you get a wild spray of dots. You may have also noticed that the “Spray” tends to be directed towards the center of the tablet. | Timex/Sinclair 2068 |
| Improving Zebra Graphics Tablet | Timex/Sinclair 2068 | |
| Installing the SCLD | Timex/Sinclair 2068 | |
| Interface for RAM in T/S 2068 I/O Ports | Requires Oliger expansion board. | Timex/Sinclair 2068 |
| Interface Zero on an Oliger 2068 Read Board | Timex/Sinclair 2068 | |
| Interfacing Tips and Troubles: Interfacing the Sinclair Computers, Part One | Bryan Lepkowski of Mechanicville, New York wrote in and wanted to know what changes would be required to adapt the VIC-20 EPROM programmer (The Computer Journal Vol.II, No.4) to operate with the Sinclair TS2068 color computer. As I attempted to answer his question, I realized two things. | Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Interfacing Tips and Troubles: Interfacing the Sinclair Computers, Part Two | Last month in Interfacing Tips and Troubles we presented part one of a two part article on interfacing the Sinclair computers. In part one we looked at the hardware required for a simple interface, and explained how to protect memory space for storing machine language programs. | Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068, Type-in program |
| 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 |
| Internal RGB/Reset Button Modification for the T/S 2068 | WARNING: Modification requires opening the computer case, drilling one hole and cutting out a opening the slot for a will void any warranty from the manufacturer. Parts Required Tools Required Modification – Mechanical Place the T/S 2068 on a flat surface which is covered with a towel or foam, on the keyboard side. | Timex/Sinclair 2068 |
| Internal RGB/Reset Button Modification for the TS 2068 | Timex/Sinclair 2068 | |
| Joystick (IN 31) | Project to create a Spectrum joystick port on a cartridge for the TS 2068. | Timex/Sinclair 2068 |
| Joystick Port Modification for Trakball | Describes a hardware modification to the TS2068 player 2 joystick port: breaking the trace from pin 7 and jumpering to ground allows an Atari-compatible trakball to work correctly. Wiring schematic included. Also used for a CHRDKEY Bugserio Keypad. Demonstrates the Romswitch trakball capability shown at October meeting. | Timex/Sinclair 2068 |
| Keyboard Interface for the TS1000 and the 2068 | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| Larken Lines | Timex/Sinclair 2068 | |
| Letters | I really enjoy your magazine and please keep up the good work! I have a question…do you know of any BBS program for the 2068 (using the 2050 modem)? I have included two graphic printouts that I made using a program that I call “draw”. | Timex/Sinclair 2068, Type-in program |
| LKDOS Off Switch (For MAX DOS Operation) | Add an off switch to resolve conflicts with Oliger NMI functions. | Timex/Sinclair 2068 |
| Load/Save Switch | Timex/Sinclair 2068 | |
| Logic Analyzer | For my senior project in Electrical Engineering at the University of Florida, I decided to get to know my 2068 a little better. I started dreaming up useful ideas that my instructor would think would be hard enough to be worthwhile to spend a whole semester on designing. | Timex/Sinclair 2068 |
| Low Cost High Tech 2068 Burglar Alarm | How to use your 2068 as an alarm system, connected to the joystick ports. | Timex/Sinclair 2068 |
| Low Cost Voice Recognition for the TS-2068 | With a new chip recently offered for sale through Radio Shack distributors and a few other parts, a speaker-independent word recognition circuit can be easily and inexpensively built. This article will describe how to build the circuit and interface it to a TS2068 via a joystick port. | Timex/Sinclair 2068, Type-in program |
| Make the Tasman 'B' Centronics Printer Interface Work with the Larken DS400 | Changes to make Tasman B and C printer interfaces work better with Larken disk system. | Timex/Sinclair 2068 |
| Make the Tasman 'B' CPI Work With the Larken DS-400 | Timex/Sinclair 2068 | |
| Make Your Own 2068 & TS1000 EPROM Programmer | 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 a Wafadrive Parallel Printer Cable | How to build a parallel (Centronics) printer cable that connects to the Rotronics Wafadrive. | Timex/Sinclair 2068 |
| Making a Wafadrive Parallel Printer Cable | Timex/Sinclair 2068 | |
| Memory Improves With Age | Reprint of the same article as it appeared in Update Magazine. | Timex/Sinclair 2068 |
| Memory Improves With Age? | Crazy? Perhaps so, but survival of our favorite antique TS2068 computer depends on it to a degree. Two advances are primarily responsible for this. Both extend the amount and speed of available memory, over and beyond that in the DOCK bank. Disc drives improve speed, accessibility and convenience over tape recording. | Timex/Sinclair 2068 |
| Misc Notes: Monitor Problems | Timex/Sinclair 2068 | |
| Modifying the Star NX1000 with the AERCO Printer Interface | Timex/Sinclair 2068 | |
| Monitor for Timex 2068: RGB Conversion | Describes connecting a Sears Model 4064 color monitor ($364) to a TS2068 via RGB cable (Model 6539) and an E.Z. Arties Brown RGB Conversion Kit ($19.95). Provides complete wiring table between the conversion kit and monitor cable, and adjustment tips for horizontal stability using the VAI and CS trimmers. | Timex/Sinclair 2068 |
| Moving an AROS Cartridge Onto Your AERCO Disk System | REMOVE THE LS27 FROM THE SOCKET AT LOCATION A-5 ON THE FD-68 BOARD AND REPLACE WITH THIS ASSEMBLY. SET SWITCH TO CARTRIDGE AND MOVE “NAME.ARO”, SET SWITCH TO NORM AND CAT “NAME.ARO”. ALTERNATIVES: YOU CAN BUY THIS ASSEMBLY FROM AERCO FOR $ 15 OR SEND YOUR CARTRIDGE AND $ 10 TO AERCO TO HAVE IT | Timex/Sinclair 2068 |
| My Pet Dinosaur | Interfacing a Model 28 teletype to a TS 2068. | Timex/Sinclair 2068 |
| On the Extra Simple Spectr/Emulator | Timex/Sinclair 2068 | |
| One Chip Mods: Kempstonize Your Joystick Port | Although the circuit described can be built on an external card perfectly well, it is somewhat unique in that it can be installed inside your TS2068, without interfering with the normal operation in any way. | Timex/Sinclair 2068 |
| 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, Type-in program |
| Power Supply and the 2068 | Those of us who have not “graduated” to a more up-to-date computer probably have a tangle of peripherals hanging out the back of the 2068. Each of these add-ons draws power from the internal power supply. There is a real danger of overloading it with rather nasty results. | Timex/Sinclair 2068 |
| Put MSCRIPT on EPROM | MSCRIPT is a very useful program. This article is for improving MSCRIPT, although it does not change any of the coding. What we are going to do is make it load faster by transferring it to an EPROM. The following for putting MSCRIPT on an EPROM is only for the original tape version. | Timex/Sinclair 2068, Type-in program |
| Random Access From Our Readers | One of our readers (whom I won’t identify) wrote to point out that I had omitted the letter “u” from “florescent” in one of our recent issues. Seemed to think that I might have left it out on purpose, to avoid running the risk of the common misspelling, “flourescent”. | Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Regulator Modification to 2068 | Timex/Sinclair 2068 | |
| Reset Switch for ZX81 and 2068 | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| Retrace Lines: 2068 and RGB Monitor | Like several others, I wanted to use the nifty thrifty Skip Fisher RGB monitor with both my fascinating and formidable QL and also with my trusty old friendly TS-2068. The hookup to the QL or the 2068 both gave the crisp colors known to most, but the 2068 made retrace lines across the top half of the screen, unless I used BORDER 0 (black). | Timex/Sinclair 2068 |
| Reviving the 2068 Keyboard | One of the complaints most often heard about the Timex 2068 and its keyboard is the “dead” keys and/or spacebar that so often develops. Here is a procedure that will often solve the problem. An understanding of how the 2068 keyboard is made reveals the solution. The accompanying photo shows the constituent parts. | Timex/Sinclair 2068 |
| RGB Interface for the TS2068 | Ever since I purchased my TS2068 I have longed for a REAL RGB interface. Sure, the display is OK on my 19″ Sony, but the color is “washed out” and there is that ever-present background hash. | Timex/Sinclair 2068 |
| RGB Monitor (for 2068) | Instructions for connecting RGB monitor with DIN (round) connector. Transistor sync separator circuit. | Timex/Sinclair 2068 |
| ROM Bypass Board PCB layouts | Timex/Sinclair 2068 | |
| ROM Bypass Circuit Description | Board to bypass 0-16K of the HOME bank and 0-8K of the EXROM bank. | Timex/Sinclair 2068 |
| ROM/EXROM Bypass Board for External Eproms | You have Bill Pedersen’s schematics, etc. He, of course, could not physically try them out so I tried out his ideas on my own bypass board until we got it working. Enclosed are the schematics of my version. | Timex/Sinclair 2068 |
| RS232 Port Added to Timex 2050 Modem Card | Timex/Sinclair 2068 | |
| RS232 Port Added to Timex 2050 Modem Card | To add the RS232 Port to the 2050 Modem Card requires the addition of two IC’s, a four pole double throw switch and a 9 volt battery. Component mounting is not critical and I found that all parts can be mounted on a small PC board and piggy-backed on the top of the modem card. | Timex/Sinclair 2068 |
| Run Your Memotech 64K on the 2068 | Advice on adding 64K RAM units to your 2068 system in a manner which would not require additions or modifications to the RAM pack. | Timex/Sinclair 2068 |
| Running the Unrunnable Spectrum Programs | Those who use Spectrum emulators with their TS2068’s know that there is a small percentage of “troublesome” Spectrum software. This stuff can tell that it’s not really in a Spectrum and usually complains by crashing the computer. | Timex/Sinclair 2068 |
| Saga 3 Elite Keyboard Review | Timex/Sinclair 2068 | |
| Sears RGB Monitor | Timex/Sinclair 2068 | |
| Signal Booster | Use an audio transformer to boost tape signal. Reprinted from Sincus News, May/June 1986. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Simple RGB Adapter for the T/S 2068 | Timex/Sinclair 2068 | |
| Simple RGB Adapter for the TS 2068 | Timex/Sinclair 2068 | |
| Simple Sound Port | Add a simple sound port to the rear of a Larken disk interface. | Timex/Sinclair 2068 |
| Simple T/S 2068 Out Port | As stated in part 1, the outputs of the Port or latch can drive LEDs directly however, it would be preferred to isolate the output circuitry using optoisolators. | Timex/Sinclair 2068 |
| Simple T/S 2068 Out Port (Part 2) | As stated in part 1, the outputs of the Port or latch can drive LEDs directly however, it would be preferred to isolate the output circuitry using optoisolaters. Refer to diagrams. The Port circuit can be connected to eight (8) opto devices since their is adequate power from the 5 volt computer power supply. | Timex/Sinclair 2068 |
| Simple T/S 2068 Output Port (Part 1) | Before your T/S 2068 computer can be used to perform real tasks instead of playing games or to cary out simple calculations it needs some means for actuating external devices. Our simple Out Port provides the interface between the 2068 and whatever external item you wish to control (turn ‘on’ or ‘off’). | Timex/Sinclair 2068 |
| Sinclair Talks to PC/XT | Routines to transfer files to/from a PC using a parallel printer interface. | Timex/Sinclair 2068, Type-in program |
| 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 |
| Some Short Projects for Your Timex Sinclair Computers | Not too long ago, (give or take a few years), I came home to a strange sight. Piled before the desk I used as my computer station was a foot deep mound of thermal printer paper. On the desk, my TS2040 printer was happily “Whiirrr- CHUCKing” to itself. | Timex/Sinclair 2068 |
| Spectrum Buss on 2068 | I stated in the last issue that we ordered the Rotronics Wafadrive system from England. I also promised that I would give a report on it. Unfortunately, we have yet to receive it. Anticipating it’s arrival I have prepared a Spectrum buss to plug the unit into. | Timex/Sinclair 2068 |
| Spectrum Conversion Notes: The Spectrum Expansion Connector | Convert the 2068 expansion connector to a Spectrum connector; add pull-up resistors to the EXROM socket; Spectrum Hardware Manual by Adrian Dickens; Easy Add On Projects for Your Spectrum, ZX81 & ACE by Owen Bishop. | Timex/Sinclair 2068 |
| Spectrum Emulator | One of the biggest drawbacks of the 2068 is the selection of software available for it. Timex pulled out a bit too soon before a good selection of software became available. With the project I describe here, You can run many Spectrum (48K) programs on your 2068 (ones that normally don’t run on your 2068)! | Timex/Sinclair 2068 |
| Spectrum Emulator Revisited | In last month’s article, we inadvertently left out the printed circuit board layout, so here it is this month with our apologies. Also I have drawn a side view showing how the chips sit on the board. When installing the chips, always use great care in positioning the chips in the sockets. | Timex/Sinclair 2068 |
| Spectrum Hardware Restart | Photocopied from the March 1986 issue of Practical Electronics. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Spectrum I/O Controller | Timex/Sinclair 2068 | |
| Spectrum Motherboard | Create an expansion board for your computer. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| SQ Notes: DIY ROM Switch | What’s new in the world of Sinclair Computers? Some time ago, one could at least get a hold of a magazine of some sorts to find out. Sure one would have to look for it, or perhaps order it from abroad, but at least there was something. | Timex/Sinclair 2068 |
| Static RAM on Cartridge | One area which peaked my interest is the idea of adding more memory. I was excited about the idea of going beyond that 72K boundry. I was not quite ready to take a jump an add a full 64K, but a leap to 16K, maybe. | Timex/Sinclair 2068 |
| Switchable Spectrum ROM Project for the TS 2068 | I recently purchased some Spectrum ROMs from Zebra Systems with the hope that I might be able to make my own “ROM-switch” circuit without having to pay the price of those that are commercially available. When I examined the TS-2068’s ROM circuitry I realized that this was an easier task than I had originally assumed. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| T/S 2068 Serial Cable | Fellow TS 2068 users. I have found over the last few months that. some of the information needed to complete some projects is not always clear with the instructions you may receive with the project. | Timex/Sinclair 2068 |
| T/S 2068-Spectrum ROM Module | Timex/Sinclair 2068 | |
| Tales From the Chip | Timex/Sinclair 2068 | |
| Tape Amplifier for Loading Weak Tapes | Circuit diagram for an op-amp based signal booster. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| The Art Gallery | These drawings were omitted from the article “Retrace Lines: 2068 and RGB Monitor” by Herb Schaaf, published in the January 1989 issue. | Timex/Sinclair 2068 |
| The Automatic Tape-Recorder Controller | Reprinted from Powerful Projects with Your Timex/Sinclair. | Timex/Sinclair 2068 |
| The Cassette Connection | In Volume 1, I ran a series on improving cassette reliability on the ZX81. Well, now that the TS2068 has arrived, that's all obsolete, right? Wrong! If anything, in my experience the 2068 needs even more "outside help" in getting reliable loads. | Timex/Sinclair 2068 |
| The Cassette Connection | Timex/Sinclair 2068 | |
| The Digitizer | Timex/Sinclair 2068 | |
| The Digitizer | Timex/Sinclair 2068 | |
| The Digitizer | Timex/Sinclair 2068 | |
| The Digitizer and A Problem Found: Notes from Marty | Timex/Sinclair 2068 | |
| The Digitizer and What's Happening | Timex/Sinclair 2068 | |
| The IKI Interface | Schematic of IBM keyboard to TS 2068 interface. | Timex/Sinclair 2068 |
| The Interface Zero: Adding Microdrives to Your 2068 | It took a long time for those in the sport of running to first break the four minute mile. Until it actually happened, there were those who actually considered it impossible. Once done though, the feat was repeated again and again until today, where the act is almost commonplace. | Timex/Sinclair 2068 |
| The Oliger System: Minireview | Timex/Sinclair 2068 | |
| The RGB to NTSC Converter In Other Words Rock Solid Video | Converter using LM1377, from article in December 1989 issue of Radio Electronics. | Timex/Sinclair 2068 |
| The Sinclair Z88: Considerations for Peripheral Design | Since the Z88 uses the Z-80 CPU, some of our better interfaces for the TS-2068 offer the prospects for easy adaptation to the Z88 by BUSS connector changes and re-work of chip addressing. Generally, the engineering has been accomplished for the Z-80 CPU and its 8 bit capability. | Cambridge Z88, Sinclair QL, Timex/Sinclair 2068 |
| The Sincus Light Pen | Here’s a nice little project you can whip up and get running in a couple of hours, or you can choose to spend as long as you want refining and upgrading it to suit your particular demands. | Timex/Sinclair 2068 |
| The Sincus Light Pen TS2068: An Experimental Project | Timex/Sinclair 2068 | |
| The TIMEXsinclair 2068: Bank Switching and Memory Expansion | A landmark technical article proposing interim standards for expanding the TS2068 beyond its standard memory limits. Introduces a Bank Switching Controller (BSC) design using a standard PC expansion backplane (EVEREX SYSTEMS EV-168) and an adapter card (VIDJUP Co. design) that can address up to 16 megabytes of memory. | Timex/Sinclair 2068 |
| The TS2068 Equipped with Microdrives & EMU-1 | Timex/Sinclair 2068 | |
| The ZX Printer and the 2068 | Timex/Sinclair 2068 | |
| Three Tips from Rex Lundgren | Three hardware/software tips for TS2068: (1) Adding a third diode to the earphone input circuit (near CR5/CR6) to raise logic level and improve cassette loading reliability at lower volume settings; (2) DC power supply notes for external cassette recorders using an LED as a voltage-drop element; (3) Joystick Sketcher BASIC program using the STICK function to draw on screen with the joystick. | Timex/Sinclair 2068, Type-in program |
| 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 a direct "how to" and cover all of the permutations. The response in favor of the article was overwhelming, so here it is. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| Timex 2068 EPROMs (Part 2) | Timex/Sinclair 2068 | |
| Timex 2068 User EPROMs | Timex/Sinclair 2068 | |
| Timex 2068/Epson RX80 | Using my new Timex 2068 for about a week before the April Sincus meeting I was very impressed with the new basic commands which were not available on the T/S 1000 and the keyboard was a great improvement for my “fumbling fingers”, however I was itching to get my printer attached to the expansion slot. | Timex/Sinclair 2068 |
| Tips for the T/S 2068 | Hardware modification tip describing replacement of the short factory cable on the T/S 2040 or Alphacom 32 printer with a two-foot Centronics parallel cable, requiring only seven wires. Covers the modification technique including use of electrician’s tape and cable ties, and notes that the printer and plug cases needed to be notched to accommodate the larger cable. | Timex/Sinclair 2068 |
| TS 2068 Printer Interface | Last month when I started my article for the printer interface, I came up with the idea of using the cartridge port. I had designed the printer interface using the rear edge connector on my ‘proto-board’ and everything worked great on that. | Timex/Sinclair 2068 |
| TS 2068 Printer Interface | This month I will discuss building a printer interface for the 2068. With all the software out on the market for the 2068, its hard to figure out what’s the best route to take in deciding which printer interface to buy for the best variety of good programs. | Timex/Sinclair 2068 |
| TS 2068 Products for Experimenters from the John Oliger Company | Cartridge boards, expansion boar, EPROM programmer. | Timex/Sinclair 2068 |
| TS 2068-Spectrum ROM Module | Timex/Sinclair 2068 | |
| TS Communique | Change R67 on TS2068 to adjust output impedance of composite video out. Saving Tomahawk to disk. Joystick and printing problems. | Sinclair QL, Timex/Sinclair 1000, Timex/Sinclair 2068 |
| TS-2068 - CMOS on Board | Change most ICs on 2068 to CMOS to reduce power consumption, for running off batteries. | Timex/Sinclair 2068 |
| TS-2068 Cassette LOAD AID Meter | Reprinted from CRAGIST newsletter March/April 1989. | Timex/Sinclair 2068 |
| TS-2068 Home ROM Bypass | A major barrier to fixing the problems in the HOME ROM is one of access. Even though the ROM is socketed, you still have to open up the case and risk damage. This article shows how to replace the HOME ROM without touching a screw. It is not really necessary to replace ROM with EPROM. | Timex/Sinclair 2068 |
| TS-2068 Memory Expansion | Crazy? Perhaps so, but survival of our favorite antique TS-2068 computer depends on it to a degree. Two advances are primarily responsible for this. Both extend the amount and speed of available memory, over and beyond that in the DOCK bank. Disc drives improve speed, accessiblity and convenience pver tape recording. | Timex/Sinclair 2068 |
| TS-2068 ROM ByPass Board Features and Options II | 1. The PULL rear connector is repeated so other accessories can be used, including a bank switching controller and back-plane. 2. Use two 28 pin sockets for “HOME ROM” and two for “EXROM”. That way you can use RAM chips before burning EPROM’s. | Timex/Sinclair 2068 |
| TS-2068 with Unlimited RAM capability | Schematics and machine code to expand the 2068 RAM with port buffer, clock/calendar, 56K or 64K, expansion bank controller and proper address decoding for EXROM. | Timex/Sinclair 2068, Type-in program |
| TS2050-ZX Modem Modification Project | OBJECTIVE: This Hardware/Software modification will allow the user to operate the Westridge TS2050 Modem with the Sinclair ZX Interface 1 and Microdrives. WHY IT DID NOT WORK: The reason that the TS2050 modem WILL NOT work “as-is” is because of an “address conflict” between the Interface-1 and the TS2050. | Sinclair ZX Spectrum, Timex/Sinclair 2068 |
| TS2068 Digitizer | The club is selling digitizer boards. – For one assembled, tested and shipped the cost will be $49.95 + $3 shipping and handling. If you only want the bare board it will be $19.95 + $3 s&h. The board has a leading edge connector and is ready for a mother board. | Timex/Sinclair 2068 |
| TS2068 Reset and Initialization Problems With Solution | Are you tired of having to use the 2068’s ON-OFF power switch to reset the computer? Read on, there is a solution. Do you have & Larken disk system and also one common AC power switch to turn on your computer, disk drive, disk controller, monitor. monitor, and all other peripherals? | Timex/Sinclair 2068 |
| TS2068 Reset and Initialization Problems with Solution | Describes how to add a reset switch to the 2068. | Timex/Sinclair 2068 |
| TS2068 Reset and Initialization Problems with Solution | Timex/Sinclair 2068 | |
| TS2068 ROM to EPROM | One of the ways in which a TS2068 can be put to use in an unconventional manner is to replace the internal ROM chips with EPROM chips containing the program for the custom application. There are two of these ROM chips in the TS2068. | Timex/Sinclair 2068 |
| TS2068 Serial Cable | Timex/Sinclair 2068 | |
| TS2068/Spectrum Microdrive | Timex/Sinclair 2068 | |
| Tweak and Tinker | It ain’t broke, why fix it? In a previous article (January and Apr 1989), I described the way to get of retrace lines when using the with a Skip Fisher RGB monitor. That earlier design had to compromise the TV/monochrome monitor output to get the best RGB. | Timex/Sinclair 2068 |
| Twister with power schematic | Timex/Sinclair 2068 | |
| Two-Fer One: A Double Duty Oliger Board | Timex/Sinclair 2068 | |
| TYB*BYTS | The next time you have a program that takes a long time to run (or to SAVE/LOAD), save your patience by inserting a BEEP message to catch your attention when the job is finished. You can program the BEEP for a single note, a TA-DA!, or even for Beethoven’s Fifth. | Lambda 8300, Timex/Sinclair 1000, Timex/Sinclair 2068, Type-in program |
| Tyd*Byts: Oliger Printer Port/Mscript Compatibility | If you have a slight amout of hardware expertise, here is a simple, no-extra-parts-required, modification for the JLO parallel port which provides support for the Centronics port PAPER EMPTY status bit. This also eliminates the diode-ORed pull-down, which is, theoretically, a marginal technique (although it’s cheap and seems to work fine!). | Timex/Sinclair 2068 |
| Universal LROS/AROS Development Board | True aficionados of the TS2068 will eventually decide that they want to do something with their cartridge port. Although TIMEX produced a few plug in cartridges, many of us have our own special programs in mind. | Timex/Sinclair 2068 |
| Universal LROS/AROS/Development Board Schematic | Timex/Sinclair 2068 | |
| Update 2: Interface Zero Resistor | Those who howled at my refusal to disclose a resistor value in my Interface Zero article can calm down now. The value I use is 18 ohms, 3 watts. I still have no assurance that this is the best value, as I got mostly complaints and very little help, but that value works fine for me. | Timex/Sinclair 2068 |
| Updates | Anyone who hesitated to build my Universal LROS/AROS Development Board, (SINCUS NEWS, Nov. 1984), because of the cost may want to look again. Although it can run with 2764 EPROMS (or 8264 EEPROMs, if you’re rich) its real power is shown when it’s run with 6264 RAMs. | Timex/Sinclair 2068 |
| Updates | After I write the first draft of an article, I go through it, mercilessly scratching out phrases, sentences, and even paragraphs that aren’t absolutely necessary. I do this so as not to take up too much space in the newsletter; others must also have the chance to speak their mind. | Timex/Sinclair 2068 |
| Updates | From time to time, I get reader feedback, more information. or notice something I’ve missed mentioning in a previous article. It’s worth collecting such tidbits and presenting them as a group, as I’ll do now. | Timex/Sinclair 2068 |
| Upgrading to a "Real" Keyboard: E-Z Key Makes It Easy | Back in the September ’85 issue of SUM, we ran an article on adding a large size keyboard to your computer. I find it necessary to bring it up again for this special issue. | Sinclair ZX81, Timex/Sinclair 1000, Timex/Sinclair 1500, Timex/Sinclair 2068 |
| Using Double-Sided Drives with Timex Disk Controllers | Timex/Sinclair 2068 | |
| Using the "Tomy Tutor" Recorder with TS-2068 | While looking in a Video Concepts store the other day, I came across some old computer accessories they were selling off and found some “Tomy Tutor” data recorders they were dumping at $3 each. The recorders come with a power supply and have a tape counter and speaker to monitor what you SAVE or LOAD. | Timex/Sinclair 2068 |
| Video Board Upgrade for Your TSZX | Timex/Sinclair 2068 | |
| Votre 2068 en system d'alarme | The principle of an alarm system is as simple as that of a switch: the classic open circuit or closed circuit. This principle is similar to the famous joystick, which is nothing more than a set of switches. | Timex/Sinclair 2068, Type-in program |
| Wafadrive/RS-232/Xerox Memorywriter | Timex/Sinclair 2068 | |
| Z-SI/O Serial Interface | To put it simply, the Z-SI/0 Card is the best RS-232C I/F available for your T/S2068 at ANY PRICE. This rugged, well made card, which plugs directly into the expansion port of 2068, will allow you to operate any computer peripherals your that require a serial (RS-232) port on your computer. | Timex/Sinclair 2068 |
| Z88 to IBM or TS2068 Cable | Wiring diagram for a homemade RS232 cable connecting the Cambridge Z88 (DB9 male) to an IBM PC (DB25 female), tested with PROCOMM software on the IBM. The cable also works for connecting the Z88 to the TS2068 via a Z-S10 interface (attached to the modem cable end), and for linking the QL SER2 port to | Cambridge Z88, Sinclair QL, Timex/Sinclair 2068 |
| ZVoice | Reprint of ZVOICE. | Timex/Sinclair 1000, Timex/Sinclair 2068 |
| ZX Resources: Transferring Between Computers | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| ZX81/TSXXXX Out-Board Real-Time Clock | Timex/Sinclair 1000, Timex/Sinclair 2068 | |
| ZXVoice | For starters, would you please dig out your October 1986 issue of ZX-Appeal and read Wilf Rigter’s article on pg 9 entitled “Z Voice” ? Thank you! Now I only have to talk about how to assemble the hardware. | Timex/Sinclair 1000, Timex/Sinclair 2068 |