SYNC v3 n1 – Timex/Sinclair Computers

Date: January/February 1983

Volume: 3

Issue: 1

Articles

Title	Description	Computers
256K Ram!	Aerco offers a 256K RAM upgrade either configured as a RAMdisk or port mapped in 64K banks shadowing the cartridge bank.	Timex/Sinclair 2068
8K Machine Code Keyboard Scanning	Bernard Puerzer’s program for scanning the ZX80 keyboard (Machine Code Keyboard Scanning Program) was written for the 4K ROM, His program served as the occasion to give the same ability to read the keyboard to 8K ROM users. This required adaptation since the programs are not automatically transferable. One of the problems was to get	Sinclair ZX80, Sinclair ZX81
8K Updates	Forest Treasure; Defuse; Mastermind; Hangman	Sinclair ZX81, Timex/Sinclair 1000
A Cheap and Simple EPROM Programmer	This article will show you how to build an EPROM programmer. Those interested in peripherals for the Sinclairs (floppy disk, electronic typewriters, etc.) can design monitors and controllers for those devices. Eventually you can program independent microprocessors for special purposes.	Sinclair ZX81, Timex/Sinclair 1000
A Loan Amortization Program	This program calculates monthly payments and generates an amortization schedule on consumer loans or home mortgages. The payment tells the user how much of a monthly commitment he is making, and the amortization schedule how much of the payment is being applied to interest and how much to reduce the balance on the loan.	Sinclair ZX81, Timex/Sinclair 1000
A Personal Money Management Program	When the program has been activated, simply enter income, expense, and loan principal items each month. The computer will then provide you with: An income statement for the current month and the year-to-date. An expense statement for the current month and the year-to-date. A balance sheet showing your various assets, liabilities, and net worth. A	Sinclair ZX81, Timex/Sinclair 1000
As Easy as 2+2	Ever thought about learning to program in machine code? Maybe you have. Maybe you even got far enough to open one of those thick books full of jargon and technical details. Maybe you got far enough into it to be scared away.	Sinclair ZX81
Bug Alert	Correction to reverse-video driver, “Adding on to Gladstone”.	Timex/Sinclair 1000
Building a 2068 Database, Part 2	Part 2 of a series in building CIDS, a database program.	Timex/Sinclair 2068
Calculating the Days	Knowing the number of days between two dates is frequently necessary for calculating interest, apportioning expenditures, or calculating average use of items. We are also interested in the more trivia type questions such as how many days before an important date, how many days between certain historical dates, and even how many days we have	Sinclair ZX81
Checkbook Management	A computer with its TV display, makes the task of updating and balancing a checkbook simpler than using a four-function calculator. The display enables the user to double-check entries and so helps eliminate mistakes. In addition, if mistakes are made, they are easily corrected. Below are two programs which I developed for these purposes. Each	Sinclair ZX81
For Your Support	Hardware and software offerings from Chia-Chi Chao, Mike Trivisonno, Jack Donahy, Fred Nachbaur, Tim Worcester, Games to Learn By, Kraig Pritts, John Oliger, Tom Woods and Knighted Computers.	Timex/Sinclair 1000, Timex/Sinclair 2068
Hardware Tips	Strong KBD Signals Again; Overheating Problems; RAM Expansion Problems.
Installing a UHF Modulator	Convert the ZX81 to UHF as a way of combatting interference.	Sinclair ZX81
INTERP - The Kernel of Interactive Nuts	In this article we present an easily extended, interactive interpreter, providing a stack oriented, dictionary based programming environment similar to FORTH. The interpreter is, thus, the basis for the more friendly, more interactive use of your computer. The ease with which INTERP can be coded is a dramatic demonstration of the power of the ZX81	Sinclair ZX81
Just For Fun	Bombsmash; Space Pirate Attack; Space Age Graphics; Driver	Sinclair ZX81
Keeping Time in the Home Office	Since the Sinclair computers have an internal timing feature, they can be used to make a clock display which will give you the time. Two basic programs are given below to do just that.	Timex/Sinclair 1000
Letter from England (Sync v3 n1)	One of the advantages of living in England, home of Sinclair Research, is that we get to try out some of the “extras” before anyone else. Here are some of the things that may cross the Atlantic from England for the ZX81.	Timex/Sinclair 1000
Letters	Help Wanted; New Product Problems; Elimination; DEF and PAUSE
Making Backups for Machine Language Tapes	There are two methods which can be used to make a backup: copying to a second tape or use the PEEK and POKE facilities of the ZX81.	Sinclair ZX81
MEMONOTES Makes Debut	Quarterly newsletter, for owners of Memotext and/or Memocalc and truly serious 1000 owners, is available.	Timex/Sinclair 1000
Merging With Randomness	Seeding the RND function for greater randomness.	Sinclair ZX81
Multisave	Wouldn’t it be nice 1) to key in the number of saves required and leave the ZX81 to complete that number of identical copies? 2) not have to check what variables have been assigned before incorporating this feature in a program? 3) to retain the normal, single-save mode? If this appeals to you, try the	Sinclair ZX81
Off the Wall	Short program that makes the TS 1000 attempt to list its own ROM.	Timex/Sinclair 1000
Programming the LOAD Command	Do you have some machine code programs stored on tape that require POKEing RAMTOP before LOADing the program from cassette? Or are you writing your Basic programs around a favorite machine code POKEing routine? If so, knowing how to program the LOAD command can be a real convenience.	Sinclair ZX81
QSAVE	The QSAVE package consists of: 1) a hardware unit, 2) a software program, and 3) an instruction booklet. It performs tape SAVE, LOAD, and verify at 4000 BAUD.	Sinclair ZX81
Resources (Sync v3 n1)	Listing of new user groups, books and other resources.	Timex/Sinclair 1000
Saving Your Fingers	Edit existing lines and renumber to create multiple instances where the lines are very similar.	Sinclair ZX81
Software Lo-Res for TS 1000	Machine language utility to create large characters on the screen.	Timex/Sinclair 1000
Starblasters	In “Starblasters” you must defend a sector of space from the invading alien spaceships. Your weapon is a powerful ion beam. But beware! The aliens can fire back. They can blow up your ship or even overrun your sector. Although you have five excellent ships in your fleet, you must be quick, skillful, and sometimes	Sinclair ZX81, Timex/Sinclair 1000, Downloadable
Sync Notes
The Stock Market Calculator	The Stock Market Calculator helps the investor (or user) solve the complex equations inherent in Investment Analysis.	Sinclair ZX81
The Unprintable Characters		Sinclair ZX81, Timex/Sinclair 1000
The ZX Data-Finder	The ZX Data-Finder is one of quite a variety of data handling programs now available. Typical uses for such programs include: names & addresses; inventory catalogues; customer/client records; graphic charts; product descriptions; statistics; appointment calendar; personnel files; hobby collection/with cross referencing. ZX Data-Finder does these and more because the flexibility of the program lends itself	Sinclair ZX81
Tidying Up Your Display	Routines to print, display and sum series of values.	Sinclair ZX81, Timex/Sinclair 1000
Try This		Sinclair ZX80, Sinclair ZX81, Timex/Sinclair 1000
UPD Modifications	“Print an ASCII character” routine for Centronics interface from EPROM Services. Patch for the “Universal Printer Driver“.	Timex/Sinclair 2068
Vu-Calc	Vu-Calc, developed for the Timex/Sinclair 1000 with 16K RAM, displays a table of 36 columns (numbered 01 through 36) and 26 rows (designated A through Z). Each of the 936 boxes can store up to eight characters, alpha or numeric. The screen displays 27 boxes at a time, three columns by nine rows. The “window”	Timex/Sinclair 1000
What, We Worry?	Short, amusing piece about the three main individuals behind SyncWare News at the time: Tom Woods, Fred Nachbaur and Tom Bent.
Who Won?	Gregory Harder, Denver, CO, came in first with Software LO-Res and John Byrne of Cookeville, TN, took second place with GET input program. In the 2068 corner, first prize went to John Nguyen of Louisville, KY, for submitting PIX FIX, and second prize went to Wes Brzozowski of Endicott, NY for his fully implemented 64	Timex/Sinclair 1000, Timex/Sinclair 2068