Alien Defense

By Larry Ashmun from Soft Sector Piloting your ship across the horizontally moving terrain, you must battle the various enemy spacecraft. You are under attack almost constantly from missiles and bombs, and to make matters worse, your ground patrol people are being picked up by the alien landers. To save them, you must shoot the landers and swoop down to catch the falling man. This fast action game requires skill and rapid reflexes. The model III version makes excellent use of that model's...

Do Not Take Unnecessary Risks With Your Software

If your diskette software library is not completely backed up, or, if you are wasting diskettes by making backup copies of all your diskettes, your problem is solved Using DUMPLOAD, the total contents of your diskettes can be safely dumped to tape. The hi-speed tape option allows six 35 or 40 track diskettes to fit on one C60 casette. TRS-80 Model 1 16K-48K TRSDOS or NEWDOS8O Compatible May be used to back-up TRSDOS, VTOS 4.0, NEWDOS, MICRODOS, or data disks. (Single Density)_ 16.95 on Cassette...

Mini Graf

For Models I, II and III Jim Peyton, Georgetown, KY You may have graphing programs by the diskful. Here is a miniaturized version which won't put a large bite byte on your storage space. It holds a dozen items, just enough for a year's worth of months or whatever, and supports a range ratio of 1 to 50. All inputs are prompted. It even centers itself vertically on the screen. For the Model II you will need to change the PRINT statement in the second line to 80 INT 12 I l 2 31-LEN A 2 and the...

Word processor

There is a new word processor on the market that will change the way people think about the capabilities of the TRS-80. Imagine a powerful mainframe text editor running on a TRS-80, with virtual compatibility between the two versions. Imagine total support for all popular TRS80 printers, with total compatibility with all operating systems. Imagine a word processing system with automatic mailing list text insertion built right in. Imagine on-going support second to none, with superb...

Double precision function routines

For all models, tape or disk except the color computer Did you scientific TRS-80 programmers know that SQR, LOG, EXP and the Trigonometric functions still give single precision results even though they may be defined as double The results appear to be double precision, but the last 10 digits are actually garbage. This problem has prompted me to write subroutines that calculate these functions even though Radio Shack sells a similar version part 26-1704 9.95 . The program was written for two...

Arcnet

I doubt there is a TRS-80 owner who hasn't heard about our joint announcement with Datapoint to create an ARCNET local network for Model II's, using their protocol and proprietary LSI Large Scale Integration chip. Target for availability is the end of the second quarter of calendar year 1982. ARCNET stands for Attached Resource Computer NETwork. The system will consist of two main components Applications Processors work stations which run their own programs locally , and File Processor s ,...

Star Fighter

By Adventure Mod I amp III Tape 24.95 Mod I Disk 29.95 i These Disk versions save high score to disk. JJ SPECIAL DEAL - This Month Only I Purchase 1 Game - List Price Purchase 2 Games - Deduct 10 KS , Purchase 3 Games - Deduct 15 Purchase 5 Games - Deduct 20 C.O.D. - certified check. M.O. or cash only. Most orders shipped next day. All orders must have shipping included. Please add 2 or 2.50, whichever is higher for shipping. Michigan residents please add 4 tax. Add extra S1.50 for C.O.D....

The Wobd Processob Fob Businessmen And Pbofessionals

We offer you ongoing support by answering your questions and providing reasonably A FEW OF NEWSCRIPT'S STANDARD FEATURES Form Letters with merging of names and addresses Gives superb appearance to your final documents Comprehensive manual with hundreds of examples Centering, top bottom titles, indents, pagination Underlining, boldface, double-width, italicst Sub-scripts. super-scripts, proportional pitch Generates Table of Contents, sorted Index Allows block graphics, special symbols t Search...

Forth Books Available

MMSFORTH USERS MANUAL - without Appendices, for non-owners . 17.50 best companion to our man- 15.95 INVITATION TO FORTH - detailed beginner book on figFORTH . 17.50 THREADED INTERPRETIVE LANGUAGES - advanced, excellent analysis of MMSFORTH-IIke PROGRAM DESIGN amp CONSTRUCTION - intro to structured programming, good for Forth 13.95 FORTH -79 STANDARD MANUAL official reference to 79-STANDARD word set, etc 13.95 FORTH SPECIAL ISSUE, BYTE Magazine Aug. 1980 -we stock this collector's item for Forth...

Ldos Dealers

Tucson 85712 602 323-9391 irkansas Micro Computer Systems, Inc. Hotsprings 71901 501 623-5209 B.G.L. Technology Van Nuys 91409 213 787-0535 Berkeley Microcomputers Berkeley 94701 415 848-7122 Byte Shop of Placentia Placentia 92670 714 524-5380 Byte Shop of San Diego San Diego 921 11 714 565-8008 Central Campbell Computers Campbell 95008 408 370-0199 Computer Forum Santa Fe Springs 90670 213 921-211 1 Computerland of 1000 Oaks Thousand Oaks 91360 805 495-3554 Dimensional Software San Diego 92117...

Hash codes simplified

A hash code is a general form of table lookup procedure known as key transformation. The key variable contains the information used to recover the data record. Why hash coding There are several good reasons 1. It can cut searching time to as little as a single look if we're lucky. 2. It can provide a simple access technique for complicated record keys. 3. It can reduce the size of a file required to store information. In the September issue, a To Do List program was used as an example of a...