Gainesville TUG Meetings

The Gainesville Timex Users Group has changed its meeting time and place. Meetings are now the third Tuesday of each month in the northeast classroom area of the Crossroads Church building located at 2720 SW Second Avenue in Gainesville. Meeting time is still 7:00 p.m. These facilities are somewhat larger than what we have used in the past and can accom- modate a number of computer set-ups.

Anyone needing more information about the next meeting can call Joe Williamson at 904/462-1086 or Richard Cravy at 904/378-9000.

TS 1500 TS 2068

THE SINCLAIR/TIMEX USERS MAGAZINE 3224 Northwest 30th Avenue Gainesville, Florida 32605 904/378-9000 or 462-1086 evenings

FS Pe Sn Joe Williamson Richard Cravy Bill Woodward & John Monkus

TS 1000

SUBSCRIPTION RATES 9/1/85

Regular Subscription (U.S.) $15.00/year Canadian Subscription $18.00/year All other countries please inquire first Published monthly

ADVERTISING RATES 9/1/85

gpg, Bese oa eee eS ee ee $75 PO os oe es 0 $45 ST. 8, | See eee eee ee $25 ee eR ae ae ae er a ere $15

These prices do not include artwork or ad layout. There will be an extra charge for custom ad work. Ads should be in our offices by the 10th of month of publication.

Classifieds: $2.00 per line. FREE personal ads for subscribers (no dealers).

SUBMISSIONS

We are willing to pay for articles published (after editing). Our current rate is 10¢ per text line and 10¢ per program line (after editing). Authors should indicate if they wish to be paid when submitting material.

CORRESPONDENCE

Please provide us with all information on your mailing label in all correspondence. Your subscription expir- ation is printed on your label with four digits; the first two indicate the year, the last two the month. Please tell Our advertisers you saw their ad in SUM.

BACK ISSUES OF SUM AVAILABLE

The following back issues of SUM Magazine are available for purchase while the supply lasts. Back issues before this are no longer available except on a more expensive “photocopied” basis. To order, use or make a copy of the order form inside the back cover of this issue, check the appropriate square(s) and mail with a check to the address listed there. By popular request we have listed a partial “Table of Contents” for each issue.

- January, 1985 — TS-2068 Printer Interface Hardware

Project; Beginner's Programming, Part |; Sears RGB Monitor with TS-2068; More on Spectrum software running on modified TS-2068. 10 pages.

February, 1985 — February Vendor Report; TS-2068 Printer Interface, Part Il; Beginner's Programming, Part Il; Tasword II Improvements. 12 pages.

March, 1985 — Spectrum Plus Now in U.S.; TS-2068 Printer Interface, Part Ill; A & J Microdrive Review; SPECTAX85 Review; Beginner’s Programming, Part Ill. 16 pages.

April, 1985 — Timex Portugal Coming; ZX Microdrive Interface for 2068 Announced by EMC; Tasword Il on the A & J Microdrive; User-Defined Graphics for the TS-1000, Part |; Beginner’s Programming, Part IV; Rocket Man Review; Using Aerco Interface with Spectrum Rom. 16 pages.

May, 1985 Special Issue — Publisher’s Statement; Portuguese 2068 Computer and Disk Drive System Hands-On Evaluation; Rotronics Wafadrive Review; Convert Your TV into a Monitor; Pro/File 2068 Review; Zaxxon Review; User-Defined Graphics for the TS-1000, Concluded. 28 pages.

June, 1985 — The Consumer Electronics Show; 2068 Graphics Primer; Spectrum Plus Review; Keyboard Template for Tasword II Users. 20 pages.

ry .

ASTRONOMY PROGRAMS astronamers,

(25-2066) for Mavigators, science classes,etc. Ceampute positions of Sur, Moon, & planets for any date; Find dates & times of moon phases, solar & lunar eclipses; sumrise/ Sunset times; eguinoxes/solstices (seasons); Julian Day &€ .sidereal time, Com plete set $14.95

& 1M year calendar. (Cape & maruwal):

I. Auersbacher 41 King Street Az

Belleville, NJ @7149 REESS EGER REA EKER ERHERRER eee Bee

The Computer Shopper Magazine

One of my favorite magazines, next to SUM Magazine, is the COMPUTER SHOPPER from Titusville, Florida. With an annual sub- scription rate of $15.00 and a monthly size of over 200 pages tabloid size, it has to be a great value. The SHOPPER is stuffed full of discount mail-order ads and 20 or so pages of classifieds. It is one publication that I read practically from cover to cover the articles by Stan Veit, Don Lancaster, Les Solomon and a host of lesser known writers who have fresh and interesting reviews and how-to articles for the general user as well as "survival columns" for the Timex, T1I-99/4, Sanyo, Tandy, Atari, and CP/M computers.

With the whole computer market seeming to be going to IBM and Commodore, it is great to find a publisher who recognizes the continuing needs of these other owners. The Timex column is written by Mark Fendrick, who I do not know, but who has attempted to inform CS readers of the

great potential for their machines with articles on Spectrum ROMs, microdrives, new software, and the Portuguese disk

drive system.

But even without the Timex would studiously read each issue because of the great bargains available in its pages which, alas, my bank account’ seldom can take advantage of...but that doesn't stop me from wishing! Let me give you a few examples from the most recent issue (August 1985):

Thinking of moving up to a "big" com- puter but want a bargain price? Solvex Marketing is selling brand new Sanyo MBC 3000 computers with built-in monitor, detached keyboard, two disk drives, Word- star, Calcstar, etc., and CP/M 2.2--all for an incredible $599 on page 32.

CP/M not big enough? Then perhaps’ the NCR PC1 with IBM compatibility, 256K, two disk drives, and MS-DOS 2.11 for $1295 from Computrade (page 88) is what you are looking for.

Anyone want a leading brand RGB monitor for $269? Thrifty Bits (page 94) has the 14" Leading Edge RGB monitor with 16 color output and 80 column by 25 line text dis- play ability.

Maybe you need a printer. How about an

column, I

Okimate 20 with parallel interface for $199 (p. 134); a Comrex CR-IIE 20 cps daisy wheel printer for $266 (p. 135); a 3M Whisperwriter 200 thermal printer for $79.95 (p. 159)3 or even a Corona Laser Printer for $2699 (p. 16).

Still more "good deals"? An NEC 8201 portable computer (Radio Shack 100 look-a- like) for $348 (p. 160) sounds good. How about an Epson OX 10 for $999 (p. 182). Have a thermal 80 column printer or type- writer? Here's 8 1/2 x 11 thermal paper for $2.99 per package of 500 (p. 127).

I think this is enough to give you some idea of what all I can't afford to buy but wish I could from Computer Shopper adver- tisers. I highly recommend everyone who loves computers to subscribe, or at least pick up a copy from your local magazine rack. I have found copies at B. Dalton's, Walden's, and Albertsons. Computer Shop- per, P. O. Box F, Titusville, FL 32781. Subscriptions are $15/year. |

-- Richard Cravy

Tell them you saw it in SUM

ut pout © e! eo inven T

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All A&J Micro Drive Sales & Service products (except MICRO WAFERS) are warranted for 90 days. If your products should fail within 90 days, A&J Micro Drive will repair your products for

no charge, if return postage paid. Additionally, all products may be returned postage paid within 30 days for full refund of purchase price. 30 day refund policy may vary with A&J Micro Drive Hardware suppliers.

WAFER WARRANTY: Wafers are guaranteed for a period of 45 days from date of shipment. If the wafer should fail during this period, return the wafer post paid and replacements will be returned as soon as possible at no charge.

A&S tev?

f t 3 $ L] ) 4 E q 4 t ] a a a i a q L] a + a q i i] i H 3 e £ i 4 i iY é t ] | q 8 | | 3 . f a a | +

1050 “I” EAST DUANE AVENUE, SUNNYVALE, CA 94086

O Send $4.95 for Owners Manual and more information.

O Check or Money Order Enclosed

O C.O.D. add $1.65

O U.P.S. shipping cost, add $3.00, unless other specified O CA residents add 6.5% sales tax

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Card # Exp. date

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Hi-Res Graphics for the TS-1000 A Review of I.S.I.’s Software

“High Resolution Graphics MK. II" is a software high resolution graphics program for the TS-1000 line of computers. It has the ability to plot points, unplot points, write in upper and lower case, test a point on the screen, invert the hi-res screen, and copy the hi-res screen to the printer. The resolution comes as 192 X 128 but can be expanded up to 192 xX 256 in some applications.

The program auto-runs after loading and gives you an example of hi-res with both upper and lower case text telling where the addresses are for each operation. You use RAND USR XXX in your program each time you wish to access ae function. Each function is easy to use and examples are given.

Included in the documentation is a short program which will allow you to draw on the screen using the arrow keys (see example), and a test program for writing in upper and lower case.

As an example, to use upper and lower

case, you must first clear the hi-res screen using RAND USR_ 16572, call the hi-res routine with RAND USR 16514, place

in a PRINT statement what you wish to print in upper and lower case (using inverse characters for upper case), POKE 16417 with the line you wish it to appear in, and call the print routine with RAND USR 17285.

The characters are not the best in the world; I like the upper and lower’ case letters on the 2068 much better. If I knew where the character table started, it would be easy to change to a more pleasing character set.

:se em: soe : :{s Fr mes elt see ee ee ee et eee eee meee eee eee eB EB: ie ee tee $ BS tf SS Si sa a Fi — peer: 5: ter ee is 3 is? t's ? .-i. ¢ oa 2 es i ges : : Si-ts 332 = “ee oo —_ awe eee eee eee —_— eee + = — . . — ore :._ ee emma + se F + 7 = . ™. se: Si Pet = ; om + —- . eee ———— : a tant —.: 3 a ee = : 3 ar : o— 7 io: Oo m6 3 —— ~—E . we — + . nl — — ere : 8s 7 ten: 2 3 : & Sore = “==: : ae - —E = ll - — —_— - —— «+ ~ . — a — ase + —— sae + ms 3 ac45 > =) . > . . 4 b S. Soa = ‘2 oJ * FF —“e 3 3 =] = fF ae —e r- = my ro =. : ~~ - s =. =. aa aso . t :— . = . 7 ~~ = ,: mm. : $ . 3 3 i = a a =P. 3 a s : ss : : 2 83 Ha Pr: es: ? H - —ne ee eee . . a eee —_ . . en . . — = =_— Pood is t : . = > SR: Ty } oor = as | | a a Bw Se SS - ae ae oS toad, a H i “3 i3— = o> o mo —_ a = srersize se SStL S&S Koei Ty ss = ~*~ a ; 3 “7? : $ —— Seas oe a eee gH ed me 9 | at eel ee he el eee : Pe? aS? pa , io a io . : $ ee me ee . —~ . = ei =} — f | > 4 ee Pp. . ee 3 > —- = 4

a Hh Wl Phy r) 1 me Mh oy ! = ct Wn wl Mn 1 Ml J a i

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Lene

sina ]

or |

| AL i it Wi a | | phe forsee ell TI ae

Another thing that isn't explained in the manual is that you must be in SLOW

mode in order to see what is being printed. The plot routines are much quicker than the Sinclair plot.

The code is short and only takes about

a minute to load. I am very happy with this program. It does a lot and is easy to use. Best of all it is inexpensive. They also list a word processor using the hi-res routines which should be pretty good from what I've seen here. They state in several places that it only works with the TS-1000 and ZX81, but it loaded and ran fine on my TS-1500 as well. Available from: Inter-Pacific Inc. 3770 Duke Rd, RR #1, Canada V8X 3W9. $7.49 (US). -- Joe Williamson

Systems Victoria, BC,

SKIPPER ELECTRONICS

We have the parts you need for all your hardware construction projects.

SKIPPER ELECTRONICS 3708 Newberry Road — Gainesville, FL 32607 904/373-6796

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the beginning of the back

Creating Your Own TS-2068 Character Set

After you type in the program and _ RUN can Sets can also be saved as

I really enjoy making it you

One of the features that made me get my with this program which

2068 was the possibility of

worth the trouble until I saw the alphabet used in a program that was character set and UDG set respectively. Sinclair character set and then

use in other programs. Line 6000

character set. in better legibility,

too. INake more than

the computer

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the to

to Press &- to

use enter

you wish and press

The character editor routine is entered character

by pressing a 1 to plot, press 0 to unplot, press

arrow keys to move the dots around. return to the menu,

change. While in the edit mode,

POKE the new character.

mth

frum a hau! [n= fabs del a2 tt, fitme af

ty tte,

has A es i os 8

agese] ey

ie,

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a ee

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tal

ity

fons sl forene all fren ia |ome il ferme | { Neel wh,

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content

I don't think you will ever be with just the old alphabet again.

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ity

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S258 FRINT AY ¥43 ,-4+7:58 747

SETH FF FREE YEE’ FHEN : 62 BLUE G58: 55 Ti 2885

22638 IF INREYS=-"°4*° FHEN : GO Fi izes

S2GH IF TREE YE-LHRE if THEN EEEP #.2.fi: C2 Ti 2888

S$4i# ££ TH 2218

3HHH REM SMeitL PRINT

3Hi# FOR F-8& Fi G: FPRINT AF =F ,-fi : FPHRPER F:* “= WEST 2

2HSH PLT if4 ,f38: DRAW 3B.8: DF

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34384 FOR K-i Fi @ STEP 2: FOR Lt i FH 8 BYEP 2:

3H#48 LH SUR Gish: NEXT L: NEXT #

3H#OGB RETURN

$296 EF ¥Y/2-INF (¥72+ THEN LET &.

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3304 IF 2/2=iNT ik 42+ THEN LET iL

SHEE FTF K*eSisiINF tk42+ THEN LET

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3918 IF S$ik ,b + -—“9R* THEN FRIANT &F

i Stikh-eidt £2 ,2H+4+41L4+i+ 42; DYER 7;*°

3928 IF S$ik +i .£3-*8F* THEN PRINT Ri Stikhe4ii 42 ,28H4+1L4+i+ so: OYER i

S338 IF S2ik ,L +i: =""ar* THEN PRINT AP BPtheir 42 2844 their seh; UVER See =s ;

3Ua48 FTF Sik+i ,i +i; — a THEN FET

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3G58 RETURN

#88 FE = HRS

#48 LET A-#: LET 6-8: LET tC#-fH

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#858 Ci SUE S628: PRINT AT €,22: FHRER Fits: INVERSE i;ct: Gi S$

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4228 IF INKEYE-"N** THEN BEEP 8.8 7,22: BEEP 8.87 ,25: PRINT ATF €,2 S: FAPER 6:°° “*“: 606 Toi 2288

4238 EF INKEYES-*°S** THEN GO Ti 34 <3

$258 ££ Ti 228i

4628 IF CHR+id3 THEN LET xK-T+8s: PHGpE Ce-idd:: £6 Tl 4946

@G28 EF CHRt+iSsez FHEN LET * -b4+82: LHLE CRBS

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#658 NEXT Gg: PORE xX4i-i,F: LET FP —#: NEXT FT: RETURN

L828 Fis Bee = Spee

sig FRINT AT i3,21; PAPER Ff;

S8H2°8H FLGT i684 ,@0: DRAW 33.8: BRA

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GSH-F: PLOT INVERSE 1;187+5,58-f1 S458 NEXT J: NEXT I: RETURN 3388 CO SUG 3688: PRINT THE @; F APER F3°° P°°CREARS 1+ 44,-./81253456 FHS; 4=37°: CO SUB 66660: PRINT T HE 8; PHRER @;° f° °RSAR* CP e4--2 7% Bi2f2458789:7<¢=37"° 33i8 CE SUE 3688: PRINT THE 8; F HPER F ‘SAHECDEFGHIJELMNOPORSTUVY ZY¥ZEXIP_: GO SUE 64664: PRINT TH 6; PAPER 6; SHBCDEFGHIJELMNOP® RSTUVHXYZExF S528 CO SUE 5644: PRINT TAB @; F HPER f; fab caet shi gkimnoparstu wy KEZETE “: CO SUE G88: PRINT TH B 6; PHPER &;tabcdetghijskianorq rstuvexyz iit 3538 LO SUE 3628: PRINT THE 6; "3; PAPER 723° meCOEPGHIGKLMNG

PmRSTiLU": PAPER 8: TAB 6:°AHECHEFGH TJKLMNDOPORS TL

$5938 RETURN

S688 LEY 23-53-2565: PORE 223666 ,.i-2 SG*#INT t3/256:: POKE 23667 ,INT ¢ 3/256;:: RETURN

$6286 PORE 22675 ,T-256INT if 7256 *#!: PORE 22676,INT its256;

S422 RETURN

6486 PORE 226865 ,4@: PORE 23687 ,6£8 : RETURN

2418 PORE 2258065 ,88: POKE 23687 .2 Si: RETURN 7888 FRié CHES | 7418 INK i: PAPER S: EBEORLRER &S: €

LS 7428 PRINT AT 9,1;“TITLE OF BYTE 5 : ENTERS ““oHRg****

‘ MATH & SCIENCE SOFTWARE F for your TS1000, 1500, & TS 2068

Be MATHEMATICS ............ $14.95 pp.

Linear regression, simultaneous equations, any base conversion, determinants, compute primes, GCD, LCM, roots of functions, solve triangles, and some vector operations.

e THE CALCULUS ........... $14.95 pp

Numerical integration, differentiation, 1,2,3rd derivatives of functions, & Gaussian quadrature, ist,2nd order differential equations by Runge- Kutta and Adams-Moulton methods.

® WEATHERCASTER ....... $14.95 pp

Predict the local, short term weather (1800 pos-

sible predictions, with wind speed & direction) Also computes relative humidity, dew point, THI temperature-humidity, index, and wind chill.

e ASTROLOGY ......... wesc. 914.95 Pp

Compute astrology natal horoscope charts. Output includes Sun sign, ascendant, midheaven, planet— ary locations by sign, house & degree, Placidus house cusps, and the major “planetary” aspects.

)

@ Prices include high quality cassette tape, booklet of instructions & sample problems, and shipping by first-class mail.

@ SPECIFY COMPUTER MODEL WHEN ORDERING, PLEASE.

|. AUERSBACHER, MS. all 41 King Street, A2 Belleville, NJ 07109

: 9 Nh

THUG PORE 22524 ,41: hm Teter: INPUT :*°i8 DHRE max id ESO Ss TF itig-"*4°° THEN GO To i888

732 j%$IF s-**** THEN LET TS$-" oH i **: £50 TO YHi£

FHEG LET TE-Ugs

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THEE NEXT i

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FFB PRINT AT i ,8; VERIF ee ot me +: £6 Ti isf8¢8

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Fid&® PRINT AT 168,8:: LOAD *GoBE Fie Go TO iss

Tiga BTHP

FOSS FRINT Hist 7: FLASH i:**h i=: = T':O7 £,2; FLASH HB: Eress any Key fo caontinve ~ : FRUSE 4g&F4

FGSEG QN ERR RESET Gi To &

HEGG SFP

S828 REM HS

GAS PORE 22652 ,8: FORE 23675 ,55 : PORE 236768 ,255

Gif CLA +: FRINT AT 9,8: FLASH i 6 NGF FOP FHRE*

S828 LOAR **CaDbE

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GGGG RiP

GGGG FOPER &: INE @: FPRINT AF 28 Bit SAVE “DHRE* LINE $886: SHVE = CHRS CODE 84688 ,G365: VERIFY CHEE: PRINT AF 28,8: VERIFY

PHAR CLODE

REVIVING THE 2068 KEYBOARD continued from page 1 button across the two lines unique to that character on the keyboard. The major problem with this arrangement is the build up of a resistive corrosion on the contacts of the circuit board. Les-

sening or remedying the problem is pos- sible without opening your computer. Here are the steps:

(1) Carefully lift one corner of the key-

board overlay and gently lift off the com- plete overlay and lay it aside. You will find it stuck down with something akin to contact cement and will 1ift up without bending if you are careful.

(2) Unscrew the hard plastic sheet holding the keys in place. Turn the computer while holding this sheet in place

over with

your hand. The sheet will come out in your hand with all keys in place. Lay the sheet aside face down so the keys will not get out of place.

(3) Lift off the rubber sneet to reveal the circuit board beneath. (4) Obtain some color TV tuner contact

cleaner from Radio Shack along with some cotton tipped plastic swabs (O-tips). Scrub each circular contact point on the circuit board giving special attention to the keys which were giving trouble and the space bar contacts. (5) Reassemble your keyboard. Use contact cement to help re-stick your overlay.

Now try it out. I found that all my "dead" keys but one, and my space bar, had their old life back. Only the "i" key

still has a little difficulty contacting. -- Richard Cravy

FOOTE <%, SOFTWARE

eA h2, | 2.*. | Ree ee

The SPECTRUM ROM allows your TS2068 to run 99% of all Spectrum 48k software. Just swap out your pres- ent ROM or build the “Spectremulator’ described in the August & September issues of SUM Magazine.

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Add $1.00 on all orders for shipping/handling

FOOTE SOFTWARE P. O. Box 14655 — Gainesville, FL 32604-4655 904/462-1086 6-9 p.m. EST

Zebra Talker — A Review

The Zebra Talker is a hardware and software combination that will allow you to synthesize human speech. The system is based around the Votrax SC-01 Speech Synthesizer IC which produces 45 basic speech sounds and links them together to make speech. Approximately 1400 words are able to be created using this device. A phoneme editor and text-to-speech software come with the package.

The hardware portion of the Zebra Talker is basically an I/O port (191) connected to the Votrax speech syn-

thesizer. The interface has it's own power supply so as to not use any of the computer's power. A sound output cable leads away to be connected up to your monitor audio input or some other ampli- fier (the output is low level and requires some type of amplification). A resistor- Capacitor combination acts as an clock oscillator for the synthsizer IC. There is

TS Heritans

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IN T-S HORIZONS #7

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I l l ! I [ I i [ | é “ c i] Pog bd [aay 4 c Ye z ad eo] ie] > < } | i I [ i i i [ l [

2002 Summit Street 2 Portsmouth, Ohio 45662 SUM 4 sAtTisFACTION GUARANTEED «

and creates the proper sequence of

no on-off switch, power being supetee by plugging in the cable.

The Z Talker comes with the Votrax speech dictionary, so even if you had no software, you could create speech by just OUTing the proper values to port 191 and

then use PRINT IN 191. To make this easier, a phoneme editor program is supplied to let you easily "build" your

Own speech.

The editor lets you build up your words one sound at a time using the Votrax dictionary or your own guessing. After you have built up a word(s), you can print out

the sequence of sounds along with the Votrax symbol, the hex and decimal equi- valent, and the 2068 character. For exam-

ple, if you want it to say "computer", you would enter the following sequence of sounds as given in the Votrax dictionary:

K Uhl & Dp ¥1.-20. Bt. ft ex

Notice the different "vowel" sounds. There are 36 in all. A table containing special vowel-phoneme combinations is also given in the dictionary. This is not new; if you open any good sized dictionary, they will usually have phonetic repre- sentations at the bottom of the page. This idea is used here to create speech from a set of common sounds!

The second program contains a text to speech routine that allows you to just type in words and the computer will speak them! This is the best part of the package! Using stream #4, all text is sent to the synthesizer. The machine code can be easily added to your own, program at location 59000 and is 6000 bytes long.

The use is very easy and almost pletely transparent to the user. All you have to do is enter your text into your programs with PRINT #4 statements. For it to say “computer talks", all you would have to do is enter into your program:

com=

10 PRINT #4;"computer talks"

The text to speech program will handle about 90% of all words’ entered. The program checks for combinations of letters sounds

to produce the spoken word. Due to certain unusual combinations and so many rules in the English language, some words come out pronounced wrong. In the last example, the word "computer" comes out sounding like “compooter". To correct the pronunciation, you need to "fudge" the spelling. To make “computer™ sound right you need to enter “compu ter".

The sound from the Z Talker is very in- telligible and can be changed in pitch by a simple POKE. There are some sounds it has trouble with though. It has trouble with the "p"™ sound. It sounds more like a quiet "t" in most instances. But ' some sounds are perfect like when you have it say "six".

If you really want to change the pitch drastically, you can change capacitor C2 to a higher or lower value and make it range from sounding like Jaba the Hut to Kermit the frog!

I would like to see a nice case for the interface instead of the two pieces of cardboard stuck on each side. Also, I would like to see the power drawn from the computer instead of a separate supply and I wish that they provided a longer audio cable so it would reach the back of my monitor. One last thing, it should have a 2068 wide feedthrough connector so as to add other 2068 interfaces.

Over all, I'm impressed. The construc- tion of the interface, the quality of the programs, even the sound is pretty good. Using the text-to-speech, it's fun to see how well it pronouces all the words you tell it to and to see what happens’ when you make words up. And remember, it will sound the same no matter what computer it's on.

Available from: Zebra Systems, [Inc., 78-06 Jamaica Avenue, Woodhaven, NY 11421 (718) 296-2385 |

-- Joe Williamson

Help Our Advertisers Out... Tell Them You

Saw Their Ad in SUM MAGAZINE!

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The monthly magazine with a natural blending of two popular hobbies — Ham Radio and Computers x Articles on Ham Radio & Most Personal Computers * Hardware & Software Reviews * Various Computer Languages * Construction Articles * Much Much More

“received my moneys worth with just one issue...”

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“always stop to read CTM, even though most other magazines | receive (and write for) only get cursory examination...”

—Fred Blechman, K6UGT

SOG See ee $15.00 for 13 issues Mexico, Canada

(U.S. funds only) Permanent (U.S. Subscription) SF Tit) o} (=m Ore) 0)

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Address |

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i esssiassssssteesstsnsssnensssessunststestsasnesssnensns>

An Update on Using the Portuguese Disk Drive

As I write

this, I have had the Portu- guese disk drive system for about 6 weeks. My experience with the system continues to be very positive. The only recurring pro- blem has been a cable that sometimes does not make connection (as in TS-1000 to 16K ram pack problems).

Meanwhile, I am now saving all my Tas- word files on disk, and boot Tasword up from it. So far, I have not lost a_ single file nor has any failed to load. It is

truly a hassle-free system in this way. I

have not yet tried some of the more ad- vanced features of the operating system Since I am not much of a programmer, more

of a user of what others do.

Complaints? A few. The power supply can get very hot and definitely must be kept in a well ventilated area. The interface which plugs into the back of my computer and the cable that plugs into the interface add 6" to the depth my computer occupies on my desk. I would much prefer a Tasman or Aerco type interface box and cable connection. And speaking of inter- faces, there is no way to hook my Aerco or Tasinman interface up without using a rear edge connector extension and a Currah

"Micro-Slot" which provides two edge con- nectors mounted in parallel. Not that these are insurmountable since this issue

of SUM is being saved and loaded off the disk drive and printed using a Tasman in- terface driving our parallel daisy wheel printer.

Here are some more pluses. I have had the chance to test an Amdek 3" disk drive often advertised in computer magazines for the Tandy color computer. It works just like the Hitachi unit which comés with the Portuguese drive system. I am confident that 3 1/2" Sony, 5 1/4" Shugart SA-400 compatible, and even 8" drives can be operated on this system. They are all equipped with the same connector and use the same formatting scheme. Thus a_ second drive could be added in a more common size with diskettes available everywhere. One could even replace the single drive with a more common size once you found a way to transfer a copy of the operating system to the new diskette.

I understand that the English Micro Connection is accepting orders on the sys- tems. Contact them for more information. SUM Magazine would welcome reviews of the systems being offered by Ramex and Aerco. Anyone owning one of these systems who is willing to provide any kind of review at all may contact SUM. If nothing else, we will call you and interview you over the phone and then write up the essence of the interview. Call us at 904-378-9000 or 462- 1086 evenings.

-- Richard Cravy

FISH LOCATER

THE PROGRAM THAT TELLS YOU WHEN, WHERE AND HOW TO CATCH MORE FISH!

LET YOUR COMPUTER REVEAL THE SECRETS OF THE PROS! —_—}

Best Days to go fishing Best Locations on the water Best Times Best Depths Best Baits Best Techniques Overall Prospects any date

Special sections on: Bass - Walleye - Northern Pike

TS2066 version (cassette w/ instr) $19.95 +82 s/h

BUDGETSOFT - 230N. Main, Rushville, IN 46173 (317) 932-3966 Visa MC Checks

Monitor Output for the TS-1000 & 1500

I have had numerous requests on how to add direct video to the TS-1000 & TS-1500 computers so as to drive a composite video monitor. This has been covered many times in the past in other newsletters and magazines, but I feel that for those who are just now starting to use their computers and those who missed the other articles, here is how to do it.

The only way to do it is to the computer and make some connections and add extra circuitry. the two monitors that I have, quite well from just tapping the video signal before it goes into the modulator and connect it directly to the monitor (don't forget the ground). This method will work on almost all monitors that have a switchable input impedance -- labeled Hi-Z and 75 ohm. If you connect the video from the computer directly to the input of

inside extra On one works

the monitor, you should use the Hi-Z position. +5 Volts ce Video 202222 CS 2w22a2 : 6 Case es ovr - pru-ovt o transistor Mow to - A a with Gevond — WS Le tuput

For monitors that come only with 75 ohm input, you will need to build a= small driver circuit to the 75 ohm input of the monitor. This driver circuit can be a simple transistor emitter-follower circuit using the input impedance of the monitor as the load. Here again, a few monitors have a slight DC potential on the input, SO some sort of isolation must be used. A 0.1 micro-Farad capacitor will work fine.

Vtetetuet

RE Video Modulator me

+5 Ve Its EX) /Ts loco

The video in the

ZX81/TS-1000 found on one of the wires leading into the

can be

RF modulator. The lead to the left is video (facing from the front) and plus five volts is the center wire (+5 volts is needed for the transistor circuit).

Video +5 Velts

fetitorar

On the TS-1500, the video signal can be found on pin 11 of U1 inside the modulator

and +5 volts can be found on pin 8. The video can also be found on the left side of R30 and +5 volts on the right side of

R30 (facing the front of the computer).

These second two places are easier to get to. As far as adding a connector, I just clipped the existing leads at the RF

connector and ran my new circuitry over to

the existing connector which gives a cleaner look from the outside, but you will not be able to use a regular TV

again. -- Joe Williamson

FOR SALE: TS-2068 Computer (new), TS- 2040 Printer (new), used Panasonic cassette recorder. $150 total plus shipping. James Dunavant, 904/376-5876 evenings, weekends.

ONLY $154.95 .

How much would you expect to pay for a dual 128K fast access storage system for your Timex 2068 that included Centronics and RS232 interfaces, Spectrum software and buss emulation, and free word processing software as standard?

THE INCREDIBLE DAMCO/ROTRONICS

WAFADRIVE

*“Wafadrive for the Sinclair Spectrum $154.95. The Timex 2068 requires the Rainbow Spectrum interface and the Omni-Emu emulator cartridge. The Omni/Emu cartridge is required to operate the Watadrive

system. The Wafadrive will not operate by just changing the ROM to the Spectrum ROM or by using the ROM switch.

A fast reliable dual-

integrated System

The Wafadrive is a complete system which

contains the micro interface,

two 128K drives, RS232 and Centronics ports, all in one attractively-styled, compact unit. There is a minimum of connecting leads and no extra boxes to clutter the desk top. Like the majority of profes- sional systems, the units are dual drive. This offers the opti- mum balance between system flexibility and cost. Built-in serial and parallel interfaces allow the direct connection of just about any popular printer.

Fast and Reliable

The Wafadrive achieves very fast loading and saving, but not at the expense of reliability. Extensive research and the use of high grade materials ensure that the Wafadrive will give years of dependable operation. Data integrity is on a par with floppy disk. The fully inter-

changeable wafers are avail- able in three sizes-128K, 64K and 16K. Low capacity wafers give faster access. They are therefore most Suitable for program develop- ment applications. The high Capacity wafers are suitable for more general data storage. Loading rate is approximately 2K per second-almost twice as fast as similar products.

The Omni-Emu cartridge enables the Timex 2068 to run thousands of Spectrum pro- grams. Only ass 95.

Software _ Armed with the com-

| DRCEROTRNG TR WAFADRIVE PRICE LIST __

__ DAMCO/ROTRONICS WAFADRIVE *154.95____

(Spectrum version)

__ Omni-Emu Cartridge $39.95 __ RAINBOW Spectrum interface $34.95 __ 16K Wafer $2.99 __ 64K Wafer 83.49 __ 128K Wafer $3.99. __ RS232 Cable $12.95

$12.95

Total:

$2.00 per order all other items. (No postage required for cables, wafers, or interfaces if ordered with drive.)

MA residents add 5% sales tax.

: : | __ Centronics (Parallel) Cable | |

prehensive user manual, blank wafer and word pro- cessor supplied, you can use your Wafadrive right away. There is also a rapidly growing range of software to enable the programmer and games player to exploit the Wafadrive system to the full.

Spectrum Emulation

Postage *5.00 for Wafadrives_

drive storage system

The Rainbow Spectrum Interface changes the rear buss of the Timex 2068 to that of the Spectrum. This enables Spectrum hardware (like the Wafadrive) to run on the Timex 2068. Housed in a compact plastic case designed to complement the 2068. Only

$34.95.

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ORDERING INFORMATION - Payment can be made in the form of money order, check, VISA, or i Mastercard. Personal checks take two weeks to clear. VISA and Mastercard orders must include number, expiration date, and owner’s signature.

LL} | enclose a check/Money Order LJ Charge my VISA/MC account no. [} VISA/MC Expiration date

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Mail to: DAMCO ENTERPRISES 67 Bradley Ct.,Fall River, MA 02720 (617) 678-2110

Due to the fluctuation in the international currency, our prices are subject to change without notice.

| | | | | | J

Announcing!! “Enelish Micro Connection

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: n all o discount OF : rer to a 19! ection. This card ont em English Micro conn are

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EMC PORTUGUESE DISK DRIVE SYSTEM .............-+5- $265.00* ppd.

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*Due to fluctuations in the International Currency Market, our prices are subject to change without notice.

To Join: Send $9.95 with your name and address to ‘EMC Games Club”, 15 Kilburn Court, Newport, RI 02840, or call for more information.

Good News & Bad News

I've got GOOD NEWS and BAD NEWS. After September 1, SUM'S annual subscription rate will rise to $15 per year -- that's the bad news! The good news is that anyone who wishes to extend their subscription at the current rate of $12/year may do so up until that time. More good news: the new rate will allow us to continue to expand our coverage of the Timex/Sinclair line. Almost all the letters we get into our office indicate that our readers are well pleased with SUM and it is our intention to keep it that way. I know that I am always willing to pay for good, solid in- formation about those things in which I am interested. SUM should SAVE you money when you are ready to add software or hardware. Our advertisers are trying to hold down their costs, and our articles are aimed at helping you make more informed decisions (reviews) or help you to do it yourself (hardware and software projects).

WANTED: Anyone interested in participating in or attending a Midwest States ZX/TS Computer Fair. Please contact Frank Davis, 513 East Main Street, Peru, IN 46970.

TRADE: In an effort to extend my horizons, | would be interested in trading TS-1000 soft- ware with other owners (original copies only). You send your list and I'll send mine. Walt Legan, 8014 Nashua Lane, Orlando, FL 32817. 305/657-5770.

ORDER BLANK

O | want to subscribe/extend my subscription to SUM Magazine for one year. Enclosed is: 0 $12.00 before 9/1/85 0 $15.00 after 9/1/85 (U.S. only)

| want to order the following back issues:

O Complete Set: January ’85 - June ’85 — $8.50 O January 85 — $1.50

O February ’85 — $1.50

O March ’85 — $1.50

0 April ’85 — $1.50

O May ’85 — $2.50

O June ’85 — $1.50

Make all checks payable to “SUM Magazine’’. All prices are postage paid.

0 $18.00 (Canada in U.S. funds)

ee eo ee Address City/State/Zip

Expiration Date (see label)

I.S.1. SOFTWARE

QUALITY MACHINE CODE SOFTWARE

ESCAPE (TS 2068 Only)

Muiti-frame, nigh adventure dungeon game. Survive challenge and traps !

WORD PROCESSOR(ZX 81 / TS 1000)

16K RAM required. High speed, programme Saveable, printer output, 9K text.

HIGH RESOLUTION GRAPHICS (TS 1000 / ZX 81 Only)

Game creators : OQne minute loading, 192X128 resolution, faster PLOT, test and unplot points.

MACHINE COOE UTILITIES (ZX 81 / TS 1000 Oniy)

25 Integrated utilities ! Animation, score keeping, DATA, READ, RESTORE, multi-direction scrolling.

ALL PROGRAMS HAVE MUCH MORE !1!

TO ORDER, OR FOR FREE CATALOGUE:

INTER-PACIFIC SYSTEMS INC. SOFTWARE DIVISION

3770 Duke Road, R.R.# 1, VICTORIA, 8.C.. Canada.

Orders payable in U.S. funds, by certified cheque or international money order to [.S.I.

FOR SALE: TS-2068 with Romswitch, Tas- man Interface, Tasword II, Profile 2068, plus more. $400 or best offer. Richard Sica, 79-B Prospect Ave., Red Bank, NJ 07701. 201/842- 0517.

SUM MAGAZINE — 3224 NW 30 Avenue — Gainesville, Florida 32605 |