Mumford Micro Systems
DISK DRIVE WOES? PRINTER INTERACTION? MEMORY LOSS? ERRATIC OPERATION?
Blame The Software!
Hash could be the culprit! Pat #4'259'70b
Floppies, printers, memory & processor often interact! Our patented ISOLATORS eliminate equipment interaction AND curb damaging Pöwer Line Spikes, Surges and Hash. Guaranteed!
• ISOLATOR (ISO-1) 3 filter isolated 3-prong sockets; integral Surge/Spike Suppression; 1875 W Maximum load, 1 KW load any socket.....................................................$69.95
• ISOLATOR (ISO-2) 2 filter isolated 3 prong socket banks; (6 sockets total); integral Spike/Surge Suppression; 1875 W Max load, 1 KW either bank........................... • $69-95
• SUPER ISOLATOR (ISO-3) similar to ISO-1 except double isolation & Suppression........................ • • ■ $104.95
• SUPER ISOLATOR (ISO-11) similar to ISO-2 except double isolation & Suppression...........................$104.95
• MAGNUM ISOLATOR (ISO-17) 4 Quad Isolated sockets; For ULTRA-SENSITIVE Systems....................... $181.95
• CKT BRKR/SWITCH/PILOT (-CBS)................Add $17.00
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DEALERS ORDER TOLL FREE 1-800-225-4876
i^J Electronic Specialists, Inc.
171 South Main Street. Natick. Mass 01760
Technical & Non-800: 1-617-655-1532
Circle # 96
HOW ACCEL2 WORKS, PART 2
TRS-80 Model l/lll BASIC Compiler
The ACCEL2 program has wcjrked fine! I used it to compile a BASIC WORD PROCESSOR that was published in 80 MICROCOMPUTING in their MAY I960 issue. It was necessary to go through all of the fat—next loops because of the many jumps out of them and make corrections,but when that job was done the program worked fine. I am using it to write you this letter. The final program fits into a 32K machine.
ACCEL2 is amasiriG! I had bousht an Othello same a couple of «ears asor but never played it because of the interminably loriG time <2-3 minutes) it took the computer to make each move - no fun at all. Just for the heck of it I ran ACCEL2 on it, makiriG NO charges whatsoever to the proGramr and the whole thiriG compiled at once with no tirikeririG! It then took about 10 seconds per movef so I added a sinsle statement at the beGinniriG to DEFINT A-Zt recompiled, and the result is Just as Good as an assembly-lariGuaGe program - only a couple of seconds per move!
I also wish to state that I think that ACCEL2 is an excellent product. I have modified Scott Adams' Backgammon game to compile under ACCEL2 as an example. The original BASIC program takes 30 to 40 seconds for the average move and can take as much as 4 minutes. The compiled version averages 2 to 3 seconds per move with a maximum move time of 9 seconds (all integer variables). That is significant!!
I'VE BEFN PLAYING WITH fCCEL2 FCR A FEWH0UPS MOW Af'D IT SEEKS Tf BE PRETTY GOOD. FOR EXAMPLE, KY LFVEL 2 VFRSICN OF
RADIO SHACK'S CHECKERS GAMF DRAWS THE FOARD IN 19 iECOJOS AND MAKFS THE SECOND MOVE H 11 SECONDS. THE CCMPILED VERS I Of' DRAWS TEHE TOARD IN 11 SECOrDS f ND MOVE? IN
UNDER !' SECOND (ABFUT C. 5). A PROGRAM TO GRAPH CI)TIC EQUATIONS TOOK P SECOND? PEP PLOT, WHILF THF CONPILFD CrPY TAKES LFSS THAN 2.
a. HAVE COMPILED ONI? PROGRAM I USE RATHER FREQUENTLY? II EXTRACTS INFORMATION FROM A I. ARRET DTSK FHE < 13'!0 <M BY1E RECORDS PER Dl'SK) AND PRODUCES A REPOli I . THE. INtERPRE I ED VERSION OCCUPIE S ABOUT 4600 BYTES) AND TAKEU .1.8 MTN TO EXTRACT INFORMATION FROM ONE DISK. THE COMPILED VERSION TAKES JUST' OVE.K 3 MIN TO PERFORM THE. SAME. TASK. SINCE A TYPICAL RtPORl INVOLVES ANYWHERE. FROM 5 JO 25 DISKS» THIS It; A SUBS) AN II At SAVINC OF TIME .
ACCEL2: 32K TRS-80 Model 1/ III. Compiles selected subset in all variable types, local and global compilation options, output save to ES/F wafer, disk under TRSD0S, NEWD0S, NEWDOS/8O. New functional improvements in place.
ALLEN GELDER SOFTWARE Mastercharge/Visa Box 11721 Main Post Office CA add 6% San Francisco, CA 94101 (415)387-3131
i Stringy/Floppy tmexatroninc NEWDOStmApparat, Inc
Developed in Britain by Southern Software
TRS-80, TRSDOStm Radio Shack
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Circle # 95
ADVENTURES!!! For TRS-80 and COLOR-8O. These Adventures are written.in BASIC, are full featured, fast action, full plotted adventures that take 30-50 hours to play. (Adventures are interactive fantasies. It's like reading a book except that you are the main character as you give the computer commands like "Look in the Coffin" and "Light the torch.")
Adventures require 16K. They sell for $14.95 each.
ESCAPE FROM MARS (by Rodger Olsen) This ADVENTURE takes place on the RED PLANET. You'll have to explore a Martian city and deal with possibly hostile aliens to survive this one. A good first adventure.
PYRAMID (by Rodger Olsen) This is our most challenging ADVENTURE. It is a treasure hunt in a pyramid full of problems. Exciting and tough!
TREK ADVENTURE (by Bob Retelle) This one takes place aboard a familiar starship. The crew has left for good reasons -but they forgot to take you, and now you are in deep trouble.
DEATH SHIP (by Rodger Olsen) Our first and original ADVENTURE, this one takes place aboard a cruise ship -but it ain't the Love Boat.
VAMPIRE CASTLE (by Mike Bassman) This is a contest between you and old Drac - and it's getting a little dark outside. $14.95 each.
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