Reference

Articles (375)

TitleAuthor(s)PublicationDate
16K RAM Pack SchematicSQ Syntax QuarterlyWinter 1982
16K RAM Pack SchematicLISTing NewsletterApril 1994
2050 Modem SchematicLISTing NewsletterSeptember 1997
2068 Bank Switching, Part IVLISTing NewsletterJuly - September 1986
2068 Circuit DiagramCATS NewsletterJanuary 1986
2068 Dock Connector For More Than GamesISTUG NewsletterMarch 1988
2068 Random Numbers
Describes the random number generation scheme in the 2068.
CATS NewsletterMay 1985
2068 ROM Bug
Documents bug described in tech manual.
CATS NewsletterMarch 1985
2068 System Variables Usage
REPDEL 23561 contains 35. Poking in 0 will stop the repeating key function. Poking in 1 makes the machine extremely...
Sincus NewsApril 1985
2068 Tape Tutorial
Detailed description of how the TS 2068 saves programs to tape. Includes information about the record format on tape, all...
Sinc-LinkNovember/December
2068 to Spectrum Cross-ReferenceH. Edward WepplerCATS NewsletterSeptember 1985
4K ROM: Display Routine
DISPLAY begins the 4K ROM’s input/output module at 013Ch, or 316d.
SyntaxAugust 1981
8K Basic ROM and 16K-Byte RAM Pack Specifications
The 8K Basic ROM and the 16K-Byte RAM pack are now available from Sinclair Research (see Resources column). The specifications...
SYNCMay/June 1981
8K ROM Monitor Routines
Continuation of article from prior issue examining the 8K ROM.
SyntaxOctober 1981
8K ROMCALLS
Program scans the ROM up to 7679, building a stack of CALLED and CALLING addresses. Then it sorts and displays...
Martin Irons (K2MI)SyntaxDecember 1983
A Comparative ROM Atlas: From Spectrum to TS2068
The Abandonment of the computer scene by the Timex Corp. have caused us, the users, to fall on hard days...
Sincus NewsMay - June 1988
A Cross-Correlation of the Spectrum ROM Versus TS2068, Part 3LISTing NewsletterMarch 1985
A Cross-Correlation of the Spectrum ROM Versus TS2068, Part 4LISTing NewsletterApril 1985
A Handy Keyword and Function TableLISTing NewsletterJanuary 1986
A Keyword Table for the TS 2068TimelinezApril 1984
A New 2068 Bug?
I ran into a bit of a glich or maybe one would called it a “bug” the other day on...
Sincus NewsMay - June 1989
A Practical Study of System Variables: Put Them to Use with BASIC.
Appendix D of the user manual lists the memory addresses of RAM where most of the TS-2068 system variables are...
Bill JonesUpdate MagazineApril 1988
A Tip for QL Owners
One user found out the hard way that the QL chassis is grounded, resulting in blown video output.
Sinc-LinkJanuary/February 1988
Alphabetical Index of North American Suppliers 12/01/84LISTing NewsletterApril 1985
An Introduction to Expression Evaluation
In the Sinclair 8K ROM program of the ZX80/81 the “expression evaluator” is to be found at 0F55-111Bh (improved 8K...
SYNCMay/June 1982
Annotated 4K ROM Listing
The 4K ROM SAVE routine listing, including the original designer’s notes.
SyntaxMay 1981
Annotated 4K ROM Listing – Systems Variables
Listing tells you the values of all major variables used in the 4K ROM.
SyntaxOctober 1981
Annotated 4K ROM: LOAD Routine
Assembly for the 4K ROM’s LOAD routine. LOAD begins in ROM location 0206H, or 518d.
SyntaxJuly 1981
Another Video Primer
Definitions of common terms used to describe video signals.
SyncWare NewsMarch-April 1987
Archive Character CodesPeter HaleSinclair Timex User Group NewsletterJanuary - February 1989
Are there any mailing lists/e-zines/web-sites for the Spectrum followers?
List of sites, circa May 1996.
Update MagazineJuly 1996
Assorted TipbitsISTUG NewsletterJune 1987
Attribute Function DefinedThe Plotter
Bank Switching The Timex/Sinclair 2068 ComputerLISTing NewsletterFebruary 1986
Bank Switching the TS2068 (III)LISTing NewsletterMay 1986
Bankswitching on the T/S 2000 Series Computers, Part ILISTing NewsletterJanuary - February 1987
Bankswitching, etc….LISTing NewsletterMarch - April 1987
Basic at a StretchLISTing NewsletterSummer 1990
BASIC Bank Switching
Short recap of ways to add RAM to the TS 2068 and switch it in/out.
SyncWare NewsMar-Apr 1986
BASIC Conversion ChartThe RAMTOPOctober 1985
Beginner’s CornerCATS NewsletterApril 1986
Beginner’s Corner: D FileCATS NewsletterMay 1986
Beginner’s ROM and RAM Addresses
ROM and RAM addresses in 4K ROM, 1K RAM machines.
SyntaxMay 1981
Binary ManipulationCATS NewsletterJuly 1985
Bob’s Notebook: Tutorial on Open, Close, Channels & StreamsSinc-LinkSeptember/October 1988
Books For the 2068,SpectrumThe RAMTOPMarch 1986
Bug Alert
What’s that? Bugs in my machine? MY MACHINE? Actually, it’s nothing to be surprised about. Whenever a complex program (like...
Sincus NewsSeptember 1984
Cables for the Z88
These examples of how to make up cables for the Z88 to be used with printers, modems, and data exchange...
Update MagazineJanuary 1995
Comments on Dr. Watson’s ArticleLISTing NewsletterJanuary - February 1987
Common Electronics Symbols and Abbreviations
The following are Electronic Symbols and abbreviations, having to do with Voltge, Current, Power, Frequency, Inductance, Reactance, Capacitance, Resistance. For...
Update MagazineOctober 1987
Companies That Support the ZX-80/81
GLADSTONE ELECTONICS 901 Fuhrmann Blvd. Buffalo, NY, 14203 or 1736 Avenue Rd. Toronto, ONT, M5M 3Y7 Software & Books *...
Synchro-SetteApril 1982
Comparative ROM Atlas: From ZX Spectrum to 2068
To convert SPECTRUM software to the 2068, you need the location and function of ROM routines in each. You can...
SyntaxOctober 1984
Comparative ROM Atlas: From ZX Spectrum to 2068
Last issue I mentioned a reprint of an article by Nazir Pashtoon on Spectrum/TS2068 ROM addresses. Well, permission to reproduce...
Sincus NewsMarch - April 1988
Computus Interruptus
Originally published in SINCUS News.
ZXir QLive Alive!Fall 1994
Computus Interruptus 2
Response to Part One of this series has been quite gratifying so far. However, from what I’ve heard, it seems...
ZXir QLive Alive!Spring 1995
Computus Interruptus, Part 3
If you thought that this column’s absence last month meant [illegible]at it was over, you can think again! A brief...
Wes BrzozowskiSincus NewsApril 1985
Computus Interruptus, Part 4
As mentioned last time, the interrupt driven print-screen program we’ve been playing with is just about “all used up”, as...
Wes BrzozowskiSincus NewsMay - August 1985
Computus Interruptus, Part 5
Thanks for the ooh’s and ahh’s over last month’s interrupt driven sprite program. Even though he doesn’t do all that...
Wes BrzozowskiSincus NewsNovember - December 1985
Computus Interruptus, Part 6
Hello again! It’s time to take another look at the wonderful world of interrupts. This installment will be of most...
Wes BrzozowskiSincus NewsMarch - April 1986
Computus Interruptus, Part 7
It’s hard to believe that this series has been going on as long as it has, but it’s even harder...
Wes BrzozowskiSincus NewsJuly - August 1986
Computus Interruptus, Part 8
All good things must end. This series has to end too, and with a small quiver of nostalgia (and a...
Wes BrzozowskiSincus NewsSeptember - October 1986
Convert Your CAI Stringy Floppy to Store Variables Within the BASIC Program Just As The Cassette DoesTimelinezAugust 1984
Corrected QL Membrane Matrix
It has long been known that the layout for the membrane in the QL, as given in the manuals is...
Update MagazineOctober 1992
Data Transfer on the Serial Port
Many users now own or have access to more than one computer and find one may have certain advantages over...
Sincus NewsJanuary - February 1988
Data Transfer on the Serial PortSLUG NewsletterFebruary 1988
Developing a Memory Map Consensus
Nick Lambert of Quicksilva proposed that suppliers for the Sinclair computers reach a consensus on some kind of memory map...
SYNCMay/June 1982
Disk Drive Control & InterfacingLISTing NewsletterDecember 1985
Disk Drive Control and Interfacing, Part 2LISTing NewsletterJanuary 1986
Disk Drive Control and Interfacing, Part 3LISTing NewsletterFebruary 1986
Does Anybody Know What Time It Is?
Analysis of execution times of various functions.
Sinclair Timex User Group NewsletterJuly 1983
Dueling Devices
Problems related to incomplete I/O address decoding.
SyntaxAugust 1983
Editor Ramblings
List of companies still actively supporting Timex/Sinclair computers.
Synchro-SetteJune 1984
EPROM ConceptsLISTing NewsletterFebruary 1991
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip
Toni Baker’s book “Mastering Machine Code On Your ZX/81” was a big help in disassembling the ROM code and printing...
Sincus NewsNovember - December 1988
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip (SCL)
Attempts to reverse engineer the ULA via disassembly of ROM.
Sincus NewsNovember/December 1988
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip (SCL), Part 2
More exploration, including some circuit sketches.
Sincus NewsJanuary/February 1989
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip, Part 2
Being unable to draw the exact circuits; because of the lack of any technical data on the Ferranti Mask Programmable...
Sincus NewsJanuary - February 1989
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip, Part 3
Note: In Part I, Nov/Dec 88, under the section titled “The SCL Chip”, there is a list of circuits and/or...
Sincus NewsMarch - April 1989
Exploring the Timex/Sinclair 1000’s Sinclair Logic Chip, Part 3, Conclusion
Final installment continues with drawing of internal data latch and internal data bus.
Sincus NewsMarch/April 1989
Extra Memory Programming
Most of us can visualize the computer's "regular" memory. We know that the ROM part of memory has "fixed" machine...
Bill JonesUpdate MagazineJanuary 1988
Extra RAMLISTing NewsletterApril 1985
Free Z80 and 68008 Technical ManualsNite-Times NewsMarch 1987
From Other Basics – VAL and LEN
ZX80 Basic substitutions for LEN and VAL functions.
SyntaxSeptember 1981
Handy References and a SAFE-DOS File Indexer
DOSDEX file indexer.
Update MagazineJanuary 1988
Hardware Hints
Pinouts of the TS2068 edge connector and dock connector.
T-S HorizonsMarch 1984
Hex-Dec ConversionLISTing NewsletterNovember 1984
Hints & TipsLISTing NewsletterOctober 1984
History’s Greatest TS2068 POKEs and Extras
Collection of POKEs from various newsletters.
Update MagazineJanuary 1993
Hog Heaven – ROM Entry Points
Complete list of global subroutine calls for the 4K ROM’s eigh software modules.
SyntaxApril 1981
How ROMs and EPROMs CompareLISTing NewsletterOctober 1984
How to Change RAMTOP, Part 1The PlotterMarch 1984
IEEE-488 For Sinclair UsersISTUG NewsletterJuly - August 1991
In and Out of Caps Mode From Within a ProgramTimelinezAugust 1984
Index of 1982 Issues and Cassettes
Other product anouncements and reviews are too numerous to list but appear in the Editor Ramblings column.
Synchro-SetteJanuary 1983
Index of 1983 Issues and Cassettes
Other product announcements and reviews are too numerous to list and appear in the Editor Ramblings column.
Synchro-SetteJanuary 1984
Index to T-S Horizons Volume I
In the three indices below the numbers following each listing indicate the issue and page number where the article appears....
T-S HorizonsJanuary 1985
Index to T-S Horizons Volume II
In the three indices below, the numbers that follow each entry indicate the issue and page number where the article...
T-S HorizonsFebruary/March 1986
Input Cursors (for the TS 2068)
I like to get newsletters with bits of programming that I can use to dress-up my programming or add to...
Bill DunlopThe PlotterMay 1993
Inside Your Computer
Reprint of material from Zilog’s Z-80 Z-80A CPU Technical Manual.
SQ Syntax QuarterlySummer 1983
Internet Resource List for Sinclair Users
FTP, websites, Gopher and other resources.
Update MagazineApril 1996
Intro to Machine Language
Start of series on machine language programming for beginners.
SyntaxMay 1981
Journey to the centre of the ROMLISTing NewsletterJune 1992
Joystick ApplicationsQuarTerSWinter 1987
Joystick ConnectorsLISTing NewsletterSample Issue
Joystick InterfacesISTUG NewsletterFebruary 1988
Key Card for TS-2068LISTing NewsletterOctober 1990
Key Modifications for 2068 Users
Recently SUM ran an article on English keyboards available for Spectrum and 2068 users. At that time detailed instructions were...
SUMJanuary 1986
Keyboard Scanning
Your 2068 uses ports to scan its keyboard, as do all Sinclairs. Each uses the same addresses, but the data...
SyntaxFebruary 1984
Larken ZX-81 Disk InterfaceVISTA Newsletter
Layout Guide TS1500The RAMTOPDecember 1985
Lessons Learned on the use of Joystick Ports for I/OCATS NewsletterApril 1985
Lessons Learned on the Use of Joystick Ports for I/OLISTing NewsletterJuly 1985
Little Goodies for the 2068
The following “Little Goodies” are a collection of tips, aids, utilities, etc. that should prove helpful in 2068 programming. Special...
George MockridgeT-S HorizonsFebruary/March 1986
Little Goodies for the 2068, Edition 3LISTing NewsletterSeptember 1985
Little Goodies for the 2068, Edition 3The RAMTOPAugust 1985
Little Goodies for the TS 2068, Edition 3CATS NewsletterJanuary 1986
Logic Families
This article is a collection of data from various data books and specification sheets and is intended to provide a...
T-S HorizonsNovember 1984
Logical OperatorsZX-AppealSummer 1988
M/C BitsCATS NewsletterMarch 1986
Machine Code Topics: 2068 BASIC ROM Calls
This is the first of an occasional and indefinite series on machine-code programming for the 2068. I do not intend...
SyncWare NewsSept-Oct 1984
Machine States/The Serial Interface
One of the interesting features of the Z88 is its ability to selectively shut down parts of the internal circuitry...
Update MagazineApril 1995
Math Function Execution Time
User-tested timing of math functions.
SyntaxSeptember 1982
MC68000 CPU (Continued)Capital District Timex-Sinclair Computer Club newsletterSeptember 1990
MC68000 CPU Machine Code (cont)
Logical operations.
Capital District Timex-Sinclair Computer Club newsletterApril 1990
MC68000 CPU Machine Code ContinuedCapital District Timex-Sinclair Computer Club newsletterAugust 1990
MC68000 Machine Code (Continued)Capital District Timex-Sinclair Computer Club newsletterJune 1990
Member’s Hints and TipsLISTing NewsletterSeptember 1989
Miscellaneous Magnetic Tape TidbitsLISTing NewsletterOctober 1985
More About … the Mystery of the Missing 253
Welcome back to another episode, as we try to unravel a few more clues about the Extended Bank Switching for...
Wes BrzozowskiTime Designs MagazineSeptember/October 1986
More on Attributes
After The Editor read thru Syd Wyncoop’s excellent dissertation on using direct ink/paper/flash commands embedded within program lines and trying...
Dick WagnerThe PlotterFebruary 1987
More on Magnetic Tape CassettesLISTing NewsletterSeptember 1985
More PokesZX-AppealDecember 1987
More Timex SinclairLISTing NewsletterSeptember 1989
Motorola 68060 MicroprocessorThe RAMTOPSpring 1994
Multiple Program
Load several programs in the 2068 simultaneously.
LISTing NewsletterMarch 1986
National TS Users Group Directory
a) 1st Sinclair Users Group of Phoenix c) 1. Tony Toccora (address above) 2. Moosa Marafi (phone number below) f)...
Time Designs MagazineMay/June 1988
Navigating Through the Display File JungleCATS NewsletterAug 1986
Navigating Through the Display File Jungle
At least one reader was dissappointed with my April Fool article on display files, last time. He’d first thought that...
Sincus NewsMay - June 1986
New 8K ROM Features
Updated list of the redesigned 8K ROM features not available on the 4K ROM and a brief explanation of their...
SyntaxMay 1981
New 8K ROM Potpourri
Sinclair’s first 8K ROM had a few bugs; list of changes to the 8K ROM map.
SyntaxNovember 1981
Note on copyright; REM skips next line
REM statements with copyright notices do constitute legal protection; a blank REM causes the interpreter to skip next line.
SyntaxMarch 1981
Numbers Held Inexactly on the ZX81
First in a series of articles on numerical errors in the 8K ROM.
SyntaxMarch 1982
Obscure Commands
Years ago I was involved with the defunct Hampton Roads TSUG, and I compiled a list of commands that were...
ZXir QLive Alive!Winter 2002
Oi! Maude Someone’s Gone and Nicked the Tips Again!ISTUG NewsletterMay - June 1992
Oi! Maude Someone’s Gone and Nicked the Tips Again!LISTing NewsletterJanuary 1993
Oi! Maude Someone’s Gone and Nicked the Tips!ISTUG NewsletterMarch - April 1992
Oliger Disk Drive Interface OwnersISTUG NewsletterOctober - November 1987
Oliger Disk Interface With JLO SAFE SpecificationsISTUG NewsletterNovember - December 1989
On Loading Waveforms and LevelsLISTing NewsletterAugust 1985
Operation Codes of the 8080, 8085, and Z80 Processors
Conversion tables across the three processors. Reprint of article from March 1980 Byte magazine.
SQ Syntax QuarterlySpring 1983
Organization of Memory
The Z88 is based on a Z80 central processor running at 3.2876 MHz. The Z80 has a 16-bit address bus...
Update MagazineJuly 1989
OS-64 BugTimex Sinclair Users Group Mile High Chapter NewsletterNovember-December 1987
Parts Substitution List for ZX-81 & T/S-1000VISTA Newsletter
PC 8300 Circuit Board and Schematic
Special Supplement to the Jan.-Feb. ’88 issue of SyncWare News. PC-8300 Schematic courtesy of: SLOT ELECTRONICS MFG. 5920 Kartner Road...
SyncWare NewsJanuary/February 1988
PEEKing EXROMCATS NewsletterNovember 1985
Peeks and Pokes for the TS1000ZX-AppealNovember 1986
Perceptions
The ZX81 Parser (Part 2). In the last issue I began a discussion of the ZX81's parser which is a...
SYNCJuly/August 1982
Perceptions
This article is the third in a series discussing the ZX81 Parser. Since the first two articles may have been...
SYNCSeptember/October 1982
Picture PopperCATS NewsletterDecember 1985
Pin connections of the ZX81 expansion portZX-AppealNovember - December 1988
Playing With ElectricityZX-AppealFebruary - March 1988
Playing With ElectricityZX-AppealSummer 1990
Playing With Electricity: Channels and JobsZX-AppealJune 1988
Playing With Electricity: Memory MapZX-AppealDecember 1987
POKEs, Etc for 2068
The January 1993 issue of UPDATe magazine has a page of pokes by Frank Davis. I believe the lists that...
Dick WagnerThe PlotterMarch 1993
POKEs, Etc for 2068
An error in the March page of POKES needs a correction. The last one was RANDOMIZE 0, it should have...
Dick WagnerThe PlotterApril 1993
Poking Around
I have been collecting all sorts of pokes, hints, maps, and other information for the Spectrum and TS2068. I have...
Douglas JefferyZX-AppealFebruary - March 1988
Pot Pourri
This method of using recursive DEF FN to obtain sums was discussed in a TS Survival column in COMPUTER SHOPPER....
Elliott HammettLISTing NewsletterNovember 1985
Producing Flashy Listings
It is not widely known that ZX Spectrum and T/S 2068 listings can incorporate colour commands (and indeed FLASH and...
ZXir QLive Alive!Spring 2001
Programmer’s Corner
Here is something I picked up from Chuck Dawson in the Ft. Worth User’s Group Newsletter. Did you know that...
Chuck DawsonLISTing NewsletterApril 1985
Programming Tip For OctoberLISTing NewsletterNovember 1989
Programming Tips
Here is a cute routine to show your friends. Did you know that you can use DRAW command with a...
LISTing NewsletterOctober 1992
Programming Tips
Here are a few of my favorite RAM saving substitutes for you to ponder:
Nite-Times NewsJuly - August 1993
Programming TipsT. S. S. NewsnotesOctober 1, 1984
Programming Tips for the 2068
In honor of the “October is TS 2068 Month” movement, CATS is happy to present the following collection of tips,...
Charles Hank DicksonZX-AppealSummer 1990
Programming Tips for Timex Sinclair Computers
Some tricks I have picked up over the years are ways to save memory on your TS Computer. This are...
Don BarnardT. S. S. NewsnotesJuly - August 1985
Programming Tips on the 2068
Sometimes a programming problem can be easily solved by using certain tricks. Here are a few tips and techniques to...
ZX-AppealMarch - April 1989
QL Circuit DiagramLISTing NewsletterMarch 1994
QL Corner: Repair TipsLISTing NewsletterApril 1993
QL FAQ and resources pointer
here is my small list of usefull informations,links and addresses related to the QL. I intend to post this regularly...
Update MagazineApril 1996
QL FAQ and Resources pointer, news on news
Where to find QL resources, circa May 1996.
Update MagazineJuly 1996
QL Keyboard Connections
The following table are connections to the J-11 keyboard connector, pin 7, on the QL Mother board – 9 pin...
Update MagazineJanuary 1993
QL Keyboard Matrix ChartLISTing NewsletterOctober 1990
QL PokesSMUG BytesJanuary 1989
QL PrintoutsCATS NewsletterJune 1987
QL Serial Cable PrintoutsLISTing NewsletterMay 1991
QL Sync SignalsISTUG NewsletterSeptember - October 1989
QL TipThe PlotterAugust 1988
QL TipNite-Times NewsSeptember 1987
QZX Index
Description of the index.
Update MagazineJuly 1993
Random Pokes
If you don’t want the “side-effect” of changing the random number seed in USR calls, try: IF USR address THEN.
Sinclair Timex User Group NewsletterJune 1983
Ray Byler’s 2068 ROM
Starting with the next issue, a series of Spectrum/TS2068 ROM directories will be carried. This is available on Oliger disc,...
Sincus NewsMay/June 1989
Reading the Joysticks
The two joysticks are controlled via Register 14 (I/O Port A) of the Programmable Sound Generator Chip (see Sections 2.1.6...
CATS NewsletterJanuary - February 1985
Reference Card for the ZX80, ZX81 and Timex Sinclair 1000
Copy of the Nanos reference card.
Update MagazineApril 1994
Reference Sheet: Z80 Op-code and explanationsLISTing NewsletterOctober 1986
Resistor GuideLISTing NewsletterOctober 1988
ROM Atlas, Part IILISTing NewsletterFebruary 1985
ROM Disassembly
Here’s a nice example of why we’d want to allow two computers to communicate via their RS-232 ports.( See “Can...
Sincus NewsNovember - December 1986
ROM DisassemblySincus NewsJanuary - February 1987
ROM List Delay
4K ROM assembly listing has been delayed for a couple of weeks.
SyntaxSeptember 1981
RS-232 Pin AssignmentsISTUG NewsletterNovember - December 1989
Save Memory: Use Buried Color Codes Instead of Color Commands
Many of you have purchased commercial programs that appear to be unlistable, yet they run fine. One of the ways...
Syd WyncoopThe PlotterJanuary 1987
Saving MemoryZX-AppealOctober - November 1987
Secrets of the QL memoryLISTing NewsletterJune 1994
Setting up the 2068
Next time you sit down to program on your 2068, try this upon powering up: CLEAR 65535: POKE 23561,10: POKE...
SUM
Sinclair and Timex Directory of Suppliers
The information provided in this directory was supplied to TIME DESIGNS by the companies who are listed in it. We...
Time Designs MagazineMay/June 1988
Sinclair Internet Resources List
Recently the mass media has discovered the Internet. News reports about the Internet, both broadcast and print, are becoming more...
Update MagazineJanuary 1995
Sinclair ZX 16K RAM PackVISTA Newsletter
Sinclair ZX 16K RAM Pack Issue 3-SRC104
Schematic.
SQ Syntax QuarterlySummer 1983
Sinclair ZX Spectrum micro-FAQ
You can find an up-to-date & fuller version of this document at the following World-Wide Web (WWW) address: Please send...
Update MagazineJuly 1996
Sinclair ZX-81
Several letters in response to request for ZX-81 schematic. Letters include details about user’s experiences. Schematics of ZX80, ZX81 and...
The Computer Journal
Sinclair ZX81 FAQ
Version 1.3, revised June 13, 1995.
Update MagazineApril 1996
Sinclair ZX81 SchematicISTUG NewsletterJanuary - February 1991
Some Key Points About the TS1000 Keyboard
Most of us have “cussed” and “discussed” the pressure sensitive keyboard on Uncle Clive Sinclair’s little monster. To keep the...
Sincus NewsApril 1984
Soviet Block Crumbles: Spectrum Secrets UncoveredLISTing NewsletterJanuary 1993
Soviet Block Crumbles: Spectrum Secrets Uncovered
Although we seem to concentrate on the TS2068, many if not all of us have some sort of Spectrum ROM...
ISTUG NewsletterMay - June 1992
Spectrum Calls and Pokes
Here are a selection of POKEs and ROM calls for the Spectrum that produce some interesting effects without upsetting the...
The RAMTOPDecember 1985
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...
Jack KeeneT-S HorizonsJuly/August 1985
Spectrum Logic CircuitLISTing NewsletterOctober 1986
Spectrum ROM BugLISTing NewsletterMarch - April 1987
Spectrum ROM CallsT. S. S. NewsnotesNovember 15, 1984
Spectrum ROM Entry Points Indexed Alphabetically
The following four part catalog of the Spectrum and TS2068 ROMs comes to you through the efforts of: Ray Byler,...
Sincus NewsJuly - August 1989
Spectrum ROM Entry Points Indexed By Address
The following is the third part of a four part catalog of the Spectrum and TS2068 ROMs comes to you...
Sincus NewsNovember - December 1989
Spectrum vs TS 2068
Comparison of the two system busses so enterprising users could build their own twister board.
T. S. S. Newsnotes
Spectrum/2068 Compatibility
It is not the case that all BASIC programs for the SPECTRUM will run as is on the 2068. The...
Mike S. MorrisCATS NewsletterMarch 1985
SQ Notes
Ever wonder what some of the intended functions for some of the keywords on your computer were? Like the MOVE,...
Rudy A. HilsmannSLUG NewsletterApril 1988
SQ Notes: Biorhythms
I mentioned in last month column that I would hope to have VU-Calc +80 all polished up for this month,...
Rudy A. HilsmannSMUG BytesFebruary 1988
SQ Notes: Functions
I do not know how many of you ever seen the manual that comes with the SPECTRUM COMPUTER? It may...
Rudy A. HilsmannSMUG BytesSeptember 1988
SQ Notes: INPUT
For this month lets check some of the other fine points of SINCLAIR BASIC not covered in the TIMEX MANUAL,...
Rudy A. HilsmannSMUG BytesDecember 1988
SQ Notes: Math Functions
Some more ramblings about things not fully covered in the TIMEX MANUAL this month. Looks like the time between newsletters...
Rudy A. HilsmannSMUG BytesOctober 1988
Stop Me If You’ve Heard This BeforeSinclair Timex User Group NewsletterJanuary - February 1989
Streaming Along
I’m sure that you all know by now how to drive your printers from a program; you simply replace your...
Jim HayesCATS NewsletterJuly 1984
Streams and Channels
A stream is a dataflow in/out the program. Its home terminal is the program; its remote terminal is deliberately assigned...
John PazminoLISTing NewsletterOctober 1986
String INPUT Hints
There another use of the keyword "LINE" beside starting a program at that line when saving a program. If the...
David HoshorThe RAMTOPNovember 1985
System Variables
Here is a program which you can merge with one you have written and which will print out a list...
Scott EddySincus NewsSeptember - October 1986
System Variables and Number Storage
Appendix D of the TS-2068 user manual gives four pages of "System Variables", which most users klnda ignore, These variables...
Update MagazineApril 1988
T/S 1000 ReferenceCATS NewsletterJune 1985
T/S 2000 Tips
There have been a number of tips for the 2000 that have shown up at news letter meetings and in...
Gyuri Grell
Edward "Ned" Beeler
David Hoshor
CATS NewsletterApril 1984
T/S 2068 Color Monitor Difficulties
Some hams have difficulty using some color monitors with the T/S 2068. There are very good reasons for these difficulties....
Alex Burr (K5XY)LISTing NewsletterSeptember 1994
Tape Loading: First, Last, and AlwaysCATS NewsletterApril 1984
Tape Records
Here is all you wanted to know about saving to tape but didn’t know where to look. Except for minor...
LISTing NewsletterMarch 1986
Technical Comments Relating to the Sinclair ZX81 and the TS1000 Computers and External 16K RAMs
P.C. Boards are identified as issue 1 or issue 3. Both versions are found in ZX81s/only issue 3 is used...
Sincus NewsJanuary 1985
That Zero Line Again
On reading the last Issue of Computerchat, I became Interested in the different methods used to create line 0s In...
D. SpencerLISTing NewsletterSeptember 1989
The Anatomy of a Program Line
Program listings on the ZX/TS computers are available on command. With either LIST or LLIST, the program in the machine...
SYNCMarch/April 1984
The Backplane Map: Spectrum vs 2068
The following will give you some idea of the differences between the Spectrum expansion bus and the 2068’s. This information...
Mark FisherCATS NewsletterJanuary - February 1985
The basic route to a habit-forming hobby
BUYING a Timex Sinclair machine can be the start of a lifetime obsession with home computing. It is easy, however,...
Timex Sinclair UserJuly 1983
The Continuing Saga of 64 Columns
Analysis of Carole Corcoran’s code from the technical manual.
Triangle Sinclair Users GroupMay, June, July 1984
The Function Dispatcher
Introduction to the function dispatcher, comparison to dispatcher in MS DOS.
Sinc-LinkSeptember/October 1986
The Keyboard Scanning Ports of the TS-2068
Some time ago when first attempting to translate a “SPECTRUM” program for operation in the TS-2068, I was exposed to...
W. Fred ClabueschThe Data ExpansionSeptember 1987
The Logic Operator, NOT
For many of us, computer logic is a bit difficult to understand, and articles like the one reputed to be...
Warren FrickeLISTing NewsletterJanuary 1991
The Mystery of the Missing 253
When Timex released its Technical Manual for the TS2068, we learned how to add memory to and switch between its...
Wes BrzozowskiTime Designs MagazineJuly/August 1986
The Mystery of the Missing 253, Part Four
We stopped last time in mid-description. It seems our Good Editor has such a wealth of excellent contributions last issue...
Wes BrzozowskiTime Designs MagazineJanuary/February 1987
The Mystery of the Missing 253, Part Three
The heading really says it all. I’ve been quite pleased and encouraged by your response to Part 1. This is...
Wes BrzozowskiTime Designs MagazineNovember/December 1986
The Mystery of the Missing 253: Conclusion
It’s been wonderful to see how much interest there still is toward TS2068 bank switching. Now it’s time to tie...
Wes BrzozowskiTime Designs MagazineMarch/April 1987
The Timex/Sinclair User’s EncyclopediaThe Plotter
The TS 2068 Software Directory
Listing of vendors and their products.
Time Designs MagazineNov-Dec 1984
The TS-2068 Disk Drive Systems: Combinations to Achieve Increased Capability
All of the above Disk Systems are compatable with Cassette LOAD and SAVE operations. Cassette is the “Transfer Medium” to...
Update MagazineJanuary 1988
The ZX80 Keyboard
Technical description of the keyboard, schematic of the associated circuitry and machine language code for accessing the keyboard.
SYNCMay/June 1981
The ZX80 KeyboardLISTing NewsletterJuly - August 1994
Timex Logic, Part 1
This series of articles is called Timex Logic rather than computer logic because not all computers treat and/or use logic...
Warren FrickeLISTing NewsletterJanuary 1991
Timex Logic, Part 1LISTing NewsletterSummer 1990
Timex Logic, Part 1
This series of articles is called Timex Logic rather than computer logic because not all computers treat and/or use logic...
Sincus NewsMay - June 1990
Timex Logic, Part 2
In the preceding chapter we learned that logic is number oriented, and that conditions which are TRUE are replaced by...
Warren FrickeLISTing NewsletterJanuary 1991
Timex Logic, Part 2LISTing NewsletterSeptember 1990
Timex Logic, Part 3LISTing NewsletterDecember 1990
Timex Logic, Part 3
It has been said here before that the computer is a number oriented machine. Every thing that it does, it...
Warren FrickeLISTing NewsletterJanuary 1991
Timex Logic: The Logic Operator NOTSinc-LinkJuly/August 1991
Timex Publication Index, part 1
Many moons ago I had to prioritize the many ideas I had for my computing projects that were filling my...
Update MagazineOctober 1994
Timex Publication Index, part 2Update MagazineJanuary 1995
Timex Publication Index, part 3Update MagazineApril 1995
Timex Publication Index, part 4Update MagazineJuly 1995
Timex Releases 2068 Manual
Just at press time, Timex began to deliver copies of its comprehensive technical manual for the 2068 computers. Every owner...
SyntaxMay 1984
Timex Sinclair – ZX Spectrum ROM Routine Look-Up TableZXir QLive Alive!Winter 2000
Timex Tech Manuals Shipped
Timex shipped its initial stock of photocopied 2068 Tech Manuals and has orders for its scheduled print run.
SyntaxAugust 1984
Timex Technical Data: Connector Signal LayoutUpdate MagazineJanuary 1988
Timex Technical Data: TS-2068 SchematicUpdate MagazineJanuary 1988
Timex Technical Data: TS2068 PC Board Component LayoutUpdate MagazineJanuary 1988
Timex Tipbits
This is part of a program submitted by Joan Kealy, a member of ISTUG. The entire programs are part of...
Joan KealyISTUG NewsletterNovember 1988
Timex/Sinclair Bus Connections and EquivalentsISTUG NewsletterMarch - April 1992
Timex/Sinclair TimingLISTing NewsletterApril 1995
Tips on ZX81/TS1000 Computer Repair
Troubleshooting tips for fixing TS1000 problems.
Update MagazineJanuary 1993
To Open (and Close) Sinclair ZX-81 and Timex 1000 ComputersLISTing NewsletterDecember 1983 - January 1984
Trace
Key in this short listing to trace the variables in your program. Place it in front of your program and...
SLUG NewsletterAugust 1987
Trace Routine
This utility when MERGED with a BASIC program will list the flow of the program. If you want to see...
SLUG NewsletterJuly 1987
Trace: Find Strings
So you have tried to sort out variables in a long program to determine what the author is doing and...
Dick WagnerThe PlotterFebruary 1988
TS 1000 NotesZX-AppealSummer 1987
TS 1000 Schematic DiagramVISTA Newsletter
TS 1500 Innovations
Now that users have had a chance to make close inspections of the new TS1500 production models, a few changes...
Sincus NewsFebruary 1984
TS 2020 SchematicLISTing NewsletterApril 1985
TS 2020 SchematicLISTing NewsletterMay 1994
TS 2040 Printer SchematicVISTA Newsletter
TS 2040 Printer SchematicLISTing NewsletterJuly - September 1986
TS 2040 Printer SchematicLISTing NewsletterMay 1994
TS 2068 Bank Switching, Part 2LISTing NewsletterApril 1986
TS 2068 HOME ROM BypassISTUG NewsletterNovember 1988
TS 2068 POKEsLISTing NewsletterOctober 1984
TS 2068 Programming TipSinc-LinkJanuary/February 1993
TS 2068 ROM DisassemblySincus NewsMarch - April 1987
TS 2068 SchematicLISTing NewsletterDecember 1990
TS 2068 SchematicLISTing NewsletterMay 1994
TS 2068 Standard Memory Configuration
Memory map diagrams from the technical manual.
Update MagazineOctober 1987
TS 2068, Spectrum, ZX-81 Edge Connector signal allocationLISTing NewsletterOctober 1984
TS-1000 Notes and TipsLISTing NewsletterNovember 1992
TS-2068 Suppliers
Following is a listing of Suppliers of Software and Hardware for the TS-2068. There must be more, and Up-Date will...
Update MagazineJanuary 1988
TS1000(ZX81)/Spectrum/TS2068 Edge Connector PinoutsZX-AppealJune 1987
TS1000/ZX81 SchematicLISTing NewsletterApril 1994
TS1500 and 16K RAM Pack
Ed Tribe, a new member, and a Deposit area school teacher demoed the problem he was having with the TS1500....
Sincus NewsAugust 1984
TS1500 SchematicLISTing NewsletterApril 1994
TS2000 System SchematicSUMSeptember 1984
TS2068 Back-Plane Expansion System StandardTimelinezFebruary 1990
TS2068 Connector Pinouts
This information, from TIMEX Technical Memo #6, is supplied by TIMEX for publication by SYNTAX.
SyntaxJanuary 1984
TS2068 Home RAM MapISTUG NewsletterSeptember - October 1993
TS2068 HOME ROM BypassLISTing NewsletterJanuary 1989
TS2068 Ins and OutsTimelinezSeptember 1987
TS2068 Ins and Outs
In developing an analog joystick using the ZIP compiler, 1 found that the routine included in the instructions for reading...
CATS NewsletterAugust 1987
TS2068 Joystick Operation
The two joysticks are controlled via Register 14 (I/O Port A) of the Programmable Sound Generator Chip (see Sections 2.1.6...
LISTing NewsletterSeptember 1992
TS2068 Keyboard Scanning
Most programs require user interaction through the keyboard, and use the INPUT or INKEYS functions to do this job. This...
Mike S. MorrisLISTing NewsletterApril 1985
TS2068 Keyboard ScanningLISTing NewsletterOctober 1992
TS2068 Personal Computer Technical Reference Manual
If you need to know about how the CPU, ROM, RAM, sound chip, joysticks, keyboard, display hardware, cassette ports, or...
SyntaxJune 1984
TS2068 Port Assignments
Timex provided SYNTAX with the following chart, referred to on page 214 of your 2068 manual. This chart is what...
SyntaxJanuary 1984
TS2068 Power Supply Information from QZX
Overview of the AC adaptor and internal voltage regulation.
Update MagazineJanuary 1993
TS2068 ROM DisassemblySincus NewsMay - June 1987
TS2068 ROM DisassemblySincus NewsJuly - August 1987
TS2068 ROM DisassemblySincus NewsNovember - December 1987
TS2068 ROM Entry Points Indexed Alphabetically
The following is the second part of a four part catalog of the Spectrum and TS2068 ROMs comes to you...
Sincus NewsSeptember - October 1989
TS2068 ROM Entry Points Indexed By Address
The following is the last part of a four part catalog of the Spectrum and TS2068 ROMs and comes to...
Sincus NewsJanuary - February 1990
TS2068 Tips
If you have a program in which does a lot of printing to the screen but at certain times you...
Bill JohnsonSMUG BytesSeptember 1989
TS2068 Tips
The enclosed hardcopy of my dilemma is rather self explanatory, however just to clarify. Line 10: I want “capacitance” to...
Bill JohnsonQuarTerSSummer 1985
TS2068/TC2068 SCLD PinoutCATS NewsletterSep 1986
Two Tips: Colors, VAL$
I modified Paul Banisik’s “Second display file initialization routine” from the April RAMTOP (1985), and incorporated it into a BASIC...
Gabe SchafferThe RAMTOPDecember 1985
Understanding Baud RatesNite-Times NewsApril 1987
Understanding Floating-point Arithmetic, Part 2
Describes the workings on the 'third language' of the 8K ROM - the CALCULATOR LANGUAGE - that is used to...
SYNCMarch/April 1982
Understanding Floating-point Arithmetic, Part 3
In this article on floating-point arithmetic, we will consider the algorithms that are used in the 8K ROM program to...
SYNCJuly/August 1982
Understanding Floating-point Arithmetic: Part 1
The aim of this article is to give the reader some insight into the complex world of floating-point arithmetic. Since...
SYNCJanuary/February 1982
Updates
After I write the first draft of an article, I go through it, mercilessly scratching out phrases, sentences, and even...
Wes BrzozowskiSincus NewsMay - August 1985
Useful ROM Routines in the TS 2068
Assembly routines that enable error reporting, character printing, beeping, screen manipulation, drawing, string handling, and numeric operations efficiently.
Sinc-LinkSeptember/October 1986
Using the Larken Sequential/Random Filing System to Produce a TS2068 ROM Disassembly
Recently, I decided to develop a disassembly of the code contained in the TS2068 ROM. The procedure required the use...
Update MagazineOctober 1991
Video Interface with QL Computer
Notes on connecting TV or a variety of monitor types to the QL, along with generating the necessary signals.
Update MagazineJanuary 1992
Wafadrive SchematicISTUG NewsletterFebruary 1988
Westridge 2050 Modem Operations: A Reference GuideTimelinezAugust 1984
X-Modem
When considering using XMODEM over standard ASCII file transfer for modem communication it may appear that all of those checksum...
Sincus NewsNovember - December 1986
Z80 Chip Organization and 64K Memory DiagramCATS NewsletterJuly 1985
Z80 Command and OP Code ReferenceSinc-Link
Z88 Glossary of Terms
Application – A program set up according to the appropriate machine conventions. Bank – 16K chunk of memory, always on...
Update MagazineApril 1993
Z88 Hardware Connections
The Z88 connects to external electrical devices by using the serial port, the card slots at the front of the...
Update MagazineApril 1993
Z88BAS.TXT
Here is a list of Z88 BBC BASIC Commands Statements and functions, I’ve commented on some to help clarify. Abbreviations...
Update MagazineJuly 1995
ZX Interfaces Explained
The ins and outs of Sinclair computers. Details are given for the Spectrum as well as the ZX81.
Electronics Today InternationalFebruary 1983
ZX Memory Map
Memory map as designed, where current peripherals fit in the map and suggestions about standardization.
SQ Syntax QuarterlyWinter 1982
ZX Spectrum Tape File FormatLISTing NewsletterMay 1997
ZX-80 SchematicLISTing NewsletterApril 1994
ZX-81 Pokes & CallsLISTing NewsletterDecember 1990
ZX-81 POKEs & Calls
RAND USER 681 in FAST mode, prevents report code from display. RAND USER 757 in FAST mode saves a program...
ZXir QLive Alive!Spring 1994
ZX/81 SchematicCATS NewsletterDecember 1985
ZX/81/TS 1000 Technical-itiesLISTing NewsletterNovember 1984
ZX/TS Power Supplies
Table of details about and schematics of the ZX80, ZX81 and TS1000 power supplies.
SQ Syntax QuarterlyWinter 1982
ZX/TS Subset of 2068 Pins
Aligned with the slot, you will find the pins correspond exactly to the ZX/TS pinout with three exceptions. RAM CS,...
SyntaxDecember 1983
ZX80 and MicroAce Bus PinoutSyntaxDecember 1980
ZX81 Address DecoderZX-AppealSeptember 1988
ZX81 Graphics TemplateLISTing NewsletterOctober 1993
ZX81 I/O Map
Details about using IN and OUT on the ZX81.
ZX-AppealOctober 1985
ZX81 Logic Signals
Reference signal levels for troubleshooting.
SyntaxOctober 1982
ZX81 SchematicSQ Syntax QuarterlyWinter 1982
ZX81 SchematicLISTing NewsletterNovember 1985
ZX81/TS1000 Circuit board
Photos of top and bottom of circuit board showing component placement.
SQ Syntax QuarterlyWinter 1982
ZX81/TS1000 Tips
5. A machine code routine that allows you to insert a BASIC line at any unused line number. If by...
Sincus NewsMay - June 1988
ZX81/TS1000 Tips
7. A five byte machine code routine to save printer paper while copying screen: This routine is fully relocatable. For...
Sincus NewsJuly - August 1988
ZX81/TS1000 Tips
3. Here is a little function, which may be placed at the beginning or within a machine code program, to...
Sincus NewsMarch - April 1988
ZX81/TS1000 Tips
A method of loading and stopping an autorun program, donated to the readers of SYNC magazine several years ago by...
Sincus NewsJanuary - February 1988
ZX81/TS1000 Tips
9. Using a pocket calculator to convert decimal addresses (generally 5 numbers) to hexadecimal addresses(four digits): [ An example will...
Sincus NewsSeptember - October 1988
ZX81/TS1000 Tips
12. Here is a set of Machine code routines that uses a Floating Point Number as an address. It is...
Sincus NewsNovember - December 1988
ZX81/TS1000 Tips
15. Here is a short program to handle OCTAL INPUTS and OCTAL DUMPS.
Sincus NewsJuly - August 1989
ZX81/TS1000 Tips
16. Here is another OCTAL Input and List program. This one is based on Machine Code with BASIC support. “Why...
Sincus NewsNovember - December 1989
ZX81/TS1000 Tips
17. In the TS1000 Timex Manual there are the following mnemonic errors : a) From 00 hex. to 07 hex....
Sincus NewsJanuary - February 1990
ZX81/TS1000 Tips
Tip 19: It’s been two or three years that I have been writing these Tips. Are they still helping anyone?...
Sincus NewsJuly - August 1990
ZX81/TS1000 TipsTimelinezAugust 1985

Documents (4)

TitleAuthorPublisherDatePages
Connection Diagram for J1 on the 2050 Modem Board198x1
Installing Timex/Sinclair 2068 Emulators
A high-level guide to installing ZEsarUX, FUSE, EightyOne and Warajevo on Windows, Linux or Mac computers.
Tim Swenson, Ryan Gray, David Anderson202314
TS2068 Complete System Variables Map
This is a complete list of operating system configuration variables used by the TS-2068 original ROM. The first version of...
Gustavo Pane1985, 20231
Using MCODER2
Introduction to using the MCODER2 BASIC compiler on the Sinclair ZX81/Timex Sinclair 1000.
Tim Swenson20xx7