Educational Software
Elementary school level package, grades 1-4. Catalog program, 9 learning and 3 game programs. 8K ROM; 2K RAM. Full documentation, $14.95; cassette, $12.95; package of both, $24.95. Checks payable to:
Edson Electronics
PO Box 151211
Tampa, FL 33684
Phone: (813) 870-0282
Loading Hardware
Loading is easy—with an LED monitor. Kit, $6 + $1 s&h.
R. H. Enterprises
1408 N. 4th Ave. E.
Newton, IO 50208
Digital display cassette loading monitor; hooks up in seconds outside the computer; helps insure proper loading level without guessing. $28.95 from:
Edson Electronics
PO Box 151211
Tampa, FL 33684
Floppy Disk
Disk file storage unit to interface to the ZX81. Shugart SA400 (or equivalent) 5 1/4 in. diskette drive; motherboard; power supply; cabinet; TTL interface; 10 sector diskettes. For further information contact:
Macronics
26 Spiers Close
Knowle, Solihull
West Midlands B93 9ES
United Kingdom
Memory Expansion
The Incremental 1.1 memory expansion system. Fits inside ZX81; plugs in, no soldering; up to 16K in increments of 2K by additional plugins; low power. Incremental 1.1 socketed for maximum of 8K, £8.50; for maximum of 16K, £9.50. SAE for details to:
East London Robotics
Finlandia House
14 Darwell Close
East Ham
London E6 4BT
United Kingdom
Memory modification kit to increase the ZX81 to 2K RAM; $20 from:
Cosmonics
Box 10358
San Jose, CA 95157
Interfacing
RD 8100 System. Highly flexible modular interface system to permit real-time application of the ZX80/81. Connected by motherboard; 5 modules available starting at £27.50. For full details write:
R. E. Dickens
RD Laboratories
5 Kennedy Road
Dane End
Ware, Herts, SG12 0LU
United Kingdom
Utility Programs
Cassette I/O for ZX81. Set of utility routines to selectively read or write strings or arrays to a cassette; 500 bytes; 2K RAM required; $20 from:
Cosmonics
Box 10358
San Jose, CA 95157
Users Groups
The West Los Angeles ZX80/81 Users’ Group
PO Box 34545
Los Angeles, CA 90034
Attention: Dr. George Kuby
Phone: [phone number omitted] (afternoons only)
USA and International users welcome. Send self-addressed stamped envelope; indicate areas of interest, background with the ZX80/81, special needs, comments.
ZX Users Group of New York
PO Box 560 Wall Street
New York, NY 10005
Any one interested in forming a North Jersey Shore Users Group? If so, contact:
Bill Thompson
[address omitted]
Rumson, NJ 07760
Fairs and Workshops
Third ZX MICROFAIR. April 30 and May 1, 1982. Central Hall, Westminster, London SW1. For information exhibitors should contact:
Mike Johnston
71 Park Lane
Tottenham
London N17 0HG
United Kingdom
Phone: 01-801-9172
“Microcomputers in Education” workshop series offered on April 16, 17, 18 at Jersey City State College in Jersey City, NJ; May 18, 19, and 20 at Gutman Library, Cambridge, MA; June 7, 8, 9 at Taft School in Watertown, CN. One day workshops; ten topics to choose from; hands-on experience. For further information write:
Technical Eduction Research Centers
8 Eliot St.
Cambridge, MA 02138
Phone: (617) 547-3890
Programs
8K/1K or 8K/2K games: Basketball, Alien Destroyer, Beat the Maze, and others. Listings, $1 + $.50 s&h. Cassette tape-one program, $6 + $1 s&h.
R. H. Enterprises
1408 N. 4th Ave. E.
Newton, IO 50208
Wide range of programs on cassette for ZX81, including: Colditz, £5.95; Trafalgar, Microbox, Fighter, and Breakout. £4.95 each. Last two avail in joystick version.
Microx
52 The Strand
Worthing, Sussex
United Kingdom
Astrology for the ZX81, 16K RAM (ZX80, 8K ROM 16K RAM). Program casts accurate horoscopes in 3 min.; houses, planets, risings, and moon signs. Dealers/writers inquiries invited. Cassette and instructions, $20 (£12.50; U.S. bankdraft) from:
Active Designs
1108 Biltmore Dr.
Nashville, TN 37204