MAY/89

Vancouver sinclair users SFOUuUP

ZXAppeal is a monthly newsletter put out by the Vancouver Sinclair Users Group. For more information on the group and ZXAppeal see the backcover.

7X80 with RAM PA

POR SALA Losa 2 MINUTES cucnocciianiacase 3 TIME DESIGNS.........o..o....»o a

PROGRAMMING AIDS...5 HARDWARE PROJECT....8 2068 PROIMEPTIL 0 ciocióónnoso 10

THIS*ISSUE........

Hooray, Hooray, 1st of May, outdoor computin' Starts today!!

Just a couple of club submissions this month but they come from esteemed members: Fred N. is back with Project #2 from the "ZX Breadboarder"; and we are pleased to receive a submission from Kristian Boisvert. Kristian together with his brother Eric are the creative minds behind "Byte Power". And now for something completely different we reprint in this issue an article not directly related to Sinclair machines but certainly of interest (and maybe humourous) to any die-hard programmer. You might think you aren't in this catagory but if you can recall sitting at your machine and suddenly realizing it was two in the morning then think again. Part Two of the neat 2068 program is continued from last time. If space allows we'll also reprint one or two other "gems" from the exchange file. We also reprint a letter received from Tim Woods of Time Designs. I'm glad to hear that Tim has bounced back and plans to stay with it for a while yet. Nice to hear

from you, Tim. EEE EEE EEE EEE EEE EEE EEE EEE EE EERE EE EERE EERE

...meeting date!

FOR SALE: Dave Mumtford has a bunch of Timex gear for sale.

Software, hardware, etc. call him at 434-9757

*“BUYER BE WARE***

We find it difficult to report the following but must do so in fairness to the Sinclair Community. VSUG member Jim Horne set up shop as Insomniac Electronics and sent out notices that he would be taking over from Fred N.'s Silicon Mountain Electronics after Fred closed down. Disturbing reports are now starting to trickle in from VSUG members as well as other TS users across Canada and the U.S. saying that Jim had been sent orders and money but nothing had been received in return. Many attempts have been made to contact Jim regarding this and other matters but to date no success. The Vancouver Sinclair Users Group does not recommend anyone ordering anything from Insomniac Electronics until contact is made with Jim to find out what is going on. VSUG will try to mediate with Jim about unfilled orders but of course isn't connected with Insomniac Electronics and can't take any responsibility for Jim's lack of

performance. FEE EEE a EE EE EEE EEE

MINUTES OF APRIL MEETING

(Our Humble Scribe was not able to make the meeting so the interesting bits were noted by Chung Chow and typed up by Gerd, the Prez, Breunung...Ed)

The meeting started with 13 and ended with 16 members present.

Rusty Townsend volunteered to be our new Newsletter Publisher. Ken Abramson told us discussions on "Cold Fusion" on the Simon Fraser University bulletin board. Professors and teachers from all over North America are taking part and Ken, who has access because he is a science teacher, circulated several printouts of text from the bulletin board. The meeting was 7:36pm.

Editor's Report: -mention was made of submitted by Fred N. -pages 2 and 3 ot newsletter were done with desktop publishing program 2068.

Treasurer's Report: -$1,234.91 in the club kitty! -it was decided by majority purchase a disk drive system TS1000 Library from Jim Horne. President's Report:

-Vashon Island Sinclair Timex Association's TS1000 Public Domain Software Library Index is available. They are doing a first class job of filling up a top quality C60 with programs on both sides for a nominal fee of US$4.00 (Gerd sent them 5 to cover the extra postage to Canada). Program submissions to the library are invited. Contact Gerd for details.

-a working

about

called to order at

the article

the the for

last new the

vote to for the

prototype of a tape-to-tape software dubbing device was received from Fred N. and shown to the meeting. (The article about this device will be in the next issue of the newsletter. ..Ed)

IN RECOGNITION OF THE OVERWHELMING GENEROSITY SHOWN TO VSUG BY FRED IT WAS UNANIMOUSLY DECIDED BY ALL PRESENT THAT AS A TOKEN OF GRATITUDE AND APPRECIATION FRED NACHBAUR BE MADE A LIFETIME CLUB MEMBER.

Hardware Group Report:

- a social farewell party was held for Eric Sakara who has accepted a transfer to Winnipeg, Manitoba. TS1000 Book Library Report:

-see Mar/Apr ‘89 issue of your newsletter for complete listing. Phone or write Gerd for your book borrowing needs. Mail requests to

borrow from the library accepted from out-of-towners.

TS1000 Tape Library Report:

-soon to be catalogued same as TS1000 book library.

-Rusty Townsend contributed 5 original programs which are new to the library - thank you, Rusty!

TS2068 Book & Tape Library Report (by Rod as Bill not able to attend): -60 books and 90 programs available.

Vice President's Report:

are

-received more printouts from Harvey Taylor from the ongoing SE Ue bulletin board discussion on "Cold Fusion".

-participation in Group Tour of TRIUMF (Tri University Meson Facility) at the University of BG. invited.

Harry Slot demonstrated 2 Telegraph Printers: one "hole-punch". type dated 1865 made by the Morse Company and one later model ink-type. They were used around the late 1800's in a New York City Police Precinct before being brought to Vancouver. Harry told us that years ago he hooked it up to the antique radio demonstrated here a while back and was able to print out weather reports being transmitted in morse code to the far north.

| | |

ES

29722 Hult Road Colton, Oregon 97017 Phdne (503) 824-2658

. Dear TIME DESIGNS Subscriber,

Your still very much on our mailing list. The mailman didn't steal your magazines, and our computer didn't "accidentally" erase your name. We haven't forgotten you.

I've really slipped behind on our publishing schedule the last couple of issues, for which I apologize. Several family matters, including the sudden passing away of my father, and health problems, forced me to take substantial “time off" from my duties here at TDM.

TIME DESIGNS has always been my hobby...something I do on the side (I also hold down a full time job besides the magazine). I still feel that it is a worthwhile project, and a necessary information link for our Timex Sinclair community.

On that note, I want to emphasize, that we have not gone out of business, nor do we have plans to. You will get every issue you have paid for.

The last few weeks, and in the months ahead, I will be con- centrating on getting our magazine back on track and to better serve you. There has been, literally, an avalanche of letters, postcards, and phone calls inquiring about TDM and magazine delivery. We have tried to answer each in the order we have received them. Therefore, if it appears like we have ignored you...we have not! We have just been overwhelmed.

: I have enacted just a couple of minor changes to help.us catch up. The upcoming issues (for the time being) will be designated by Volume and Issue Number, rather than a bi-monthly designation. A fuller explanation and more details will be included in my next editorial.

Within just a couple of weeks after you receive this issue, you will be receiving another issue of TIME DESIGNS (Vol.5 No.1), which is ready for mailing. We will also be expediting the production of the following issue (Vol.5 No.2). :

Your patience and continued support has been greatly appreciated. Without you, there would not be a TIMEX SINCLAIR magazine. In return for your understanding of my tardiness, I will continue to put out a quality magazine like you've come to expect. My files are really bursting with articles and programs...look for some good information for your favorite microcomputer.

Respectfully Yours, Tim Woods

Editor/Publisher TIME DESIGNS

“PRODUCT WRAP-UP Ted Bahr

Caffeinated soft drinks: The state of the art

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Porro rr rrrorcoeoorrrsosooros

Perhaps the most universal ly rec- ognized tool for improving a pro- fessional programmer's productiv-

- ity is C. Not the C language (after all, this ¿s the April issue, not Feb- ruary) but the C additive, Caffeine.

PJ. Plauger would have us begin

this review with a definition:

cafefeine \ka-'fen, *ka-,\ # [G kaffein, fr. kaffee coffee, fr. F cafe ] (ca. 1828): a bitter alkaloid Cs H, N, O, found esp. in coffee, tea, and kola nuts and used medicinally as a stimulant and diuretic.

Much has happened in the Cola wars to date, and the intent here is to bring you up to speed on what seven leading contenders have to offer today. Table 1 shows a com- parison of basic features, Table 2 compares performance, and Table 3 ranks the products on a variety of tests.

Diet Coke Diet Coke is an ably launched se- quel to Coca-Cola’s well-known, high-calorie drinks. It scours well in the mouth and the taste is sur- prisingly full-bodied for a soda drained of all sugar. As a member of the Coke family, Diet Coke places well in the performance test with 46 mg. of caffeine per can. Diet Coke supplies the user with excellent documentation, taking care to list a variety of vitamins and minerals of which it supplies less than 2% of the U.S Daily Rec-

ommended Allowances (U.S. RDA). The documentation is not perfect, however; one particular problem is sloppy indexing. Diet Coke notes that the product con- tains phenylalanine, a danger to phenylketoneurics, but does so in tiny letters on the front of the can, not with the ingredients where one would naturally search for it (by contrast, Diet Pepsi places this in- formation with the other ingredi- ents in a bright red color).

A toll-free help line is provided to support all the Coke pro- ducts—their commercials play in the background while you are on hold. Diet Coke is an excellent re- production of the market leader and maintains its good perfor- mance for programmers while nodding to the increased health- consciousness of the world today. Mountain Dew Long the late-night programmer’s favorite with 17.4% more caffeine than any member of the Coke fam- ily and over 40% more caffeine than Pepsi, Mountain Dew means business. Clearly the heavyweight choice of this review, The Dew powers its way to a first-place fin- ish in both calories (178.8) and su- gar (44.4 mg;). Its performance pales in comparison only to Jolt.

Mountain Dew's taste is sickly sweet—the refreshing images of people splashing around in ponds are clearly in reference to the ener-

gy derived fron the drink’s effect, not the taste. And the participants in the ads are certainly not pro- grammers (imagine —swimming)). The scouring test was disappoint- ing—the tiny bubbles seemed buried by high-fructose corn syrup.

Documentation was generally good, with more information re- vealed about chemical content than any product except Diet Coke. A toll-free help number is offered on the can and questions to the technical support staff were han- dled efficiently and pleasantly.

Mountain Dew is still sporting . its peace-and-love 1960s logo. The outdated packaging combined with levels of caffeine and sugar that show almost total disregard for the 1980s health-consciousness reveal parent Pepsico’s intent to market Mountain Dew as a niche product. With only Jolt to battle head-to- head on the high end, that’s not such a bad idea.

Pepsi may be the choice of a new generation, but definitely not a new generation of programmers. Fin- ishing dead last in performance and buried in the middle of the pack with respect to calories, Pepsi is a generally uninspired product. The user interface (taste) is distinc- tive, but its caffeine engine lacks the punch of the other products we surveyed.

Pepsi offers a toll-free help line 5

Arrrrrrrrrroeeprsorrpncrrssn osea...

« CAFFEINATED SOFT DRINKS =+-

definitely qualifying as a “bou- tique” soft drink, Dr. Pepper’s unique user interface qualified it for review. Bottled by Pepsi, Dr. Pepper has had little national ad- vertising in the past few years, be- ing seen as a perennial big seller in Texas and a fancy alternative to root beer.

Despite this, Dr. P weighs in as a reasonable choice for program- mers. The taste is somewhat le- mony, light, and fruity. Documen- tation is good, but Dr. P lacks a toll-free number for support. When I did call technical support, the Pepper People seemed confused. I bounced seven times before find- ing the right person at the right number. However, once I got there, support was excellent and very cordial.

Although Dr. Pepper cannot be recommended outright due to its mediocre performance, slipping a few in between a long night of Classic Cokes may be just the change you need.

Prrrrrrrrrrrrrrrrrrsssrrrrrss.

Taking on the established Cola gi- ants is a brash move for a little company in Rochester, N.Y., and Jolt is playing its role as spoiler to the hilt. In the face of a huge tide of “caffeine-free” soft drinks, Jolt

TABLE 3.

boasts that it has “all the sugar and twice the caffeine.” On the surface, at least, it seems as if the program- mer’s ship has come in.

Jolt’s user interface is good, con- taining the bite and “look and feel” of Classic Coke and winning the scouring test. Performance is stel- lar with 32% more caffeine than Mountain Dew, 55% more than the Coke family, and a whopping 85% more than Pepsi. Unfortu- nately, none of these percentages back up the slogan aimed most di- rectly at the programming market: “twice the caffeine.”

While documentation is ade- quate, technical support was rather dismal. Jolt had the ambience of a small company, with the reception- ist answering my questions in an annoyed manner. She said the company doesn’t release informa- tion on sugar content, which is odd for a firm that boasts about it on the can. When pressed about the “twice the caffeine” claim, she said it referred to sodas other than the ones we tested but wouldn’t reveal which ones.

Despite a shaky feeling about the company’s ethics, programmers will find much to like in a can of Jolt. The only side effect may be too much of a good thing—the Grindstone test left me unable to

Additional rankings (1-10) 1—Excellent, 10—Poor

Classic Coca-Cola Compatibility with 2 UNIX programmers

Scouring effect Wetstone!

Grindstone?

ANSI conformity? Sleeve of Eratosthenes*

Notes 1. Thirst-quenching.

Coca-Cola

Diet Coke Mountain Dew

6 3 1

2. Teeth grinding after one six-pack in a two-hour period.

3. American Neurological Speed Institute.

4. Staining power test-conducted on standard Beefy T-shirt.

bear the sight of a monitor, and soon found me lurching from lane to lane at 80 mph on Rte. 101, al- ternately screeching at songs on the radio and babbling incoherently to myself about RISC chips. Use Jolt with caution.

The Winners

A close look at the seven contend- ers in this review confirmed some suspicions and raised others. Pep- si’s performance rated too poorly to recommend, and Dr. Pepper’s only real benefit is its unique user interface.

Any member of the Coke family can be recommended for general- purpose long bouts of coding and the company is to be lauded for maintaining performance levels in its newest releases. Jolt, the hands- down winner in pure performance, is too jarring to be recommended for prolonged use, but can be ex- cellent for short bursts or quick patches. Based on overall excel- lence, the winner and sultan of swig for programmer productivity is still Mountain Dew. E

Ted Babr is a frustrated writer who wound up as publisher of Embedded Systems Programming. He greatly prefers iced lattes to any of the soft drinks reviewed bere.

Jolt Pepsi Dr. Pepper

4 7 5

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-CAFFEINATED SOFT DRINKS 5:

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and has adequate documentation, but finished at the bottom of the heap in the Grindstone (teeth- grinding after one six-pack slurped down in a two-hour period), ANSI (American Neurological Speed In- stitute) conformity, and compati- bility with UNIX programmers. Although drinking Pepsi while chained to a 100,000-line Ada pro- gram for 36 hours will not make you a raving maniac, it probably won't keep you awake either. John Sculley left for Apple years ago, and we cannot recommend this product for serious programmers. New Coke

Coca-Cola’s new upstart is a wor- thy alternative to sleeping at nor- mal hours. It placed second in both the scouring test and the Wetstone (thirst-quenching). The kid brother

TABLE 1.

to Classic (real) Coke has a taste somewhere between the thinner, less-sweet Diet Coke and the heavy syrup of the original. Despite its less-sugary taste, Coke (its real name) actually has more carbohy- drates than Classic Coke, leading this reviewer to wonder if the pro- grammers who created New Coke were drinking Pepsi while they wrote the algorithms.

Coke’s performance matches its siblings at 46 mg. of caffeine per can, topping al! but the specialty pops aimed directly at software de- velopers. With three relatively high-performance products to choose from in the Coke family, a programmer really can have it all. Classic Coke Also known as “real Coke,” this product seems to be adrift in a sea

Comparison of basic features

Classic Coca-Cola

Carbonated water High-fructose

corn syrup/sugar Caramel color Phosphoric acid Caffeine Citric acid Sodium benzoate

(“a preservative”) Potassium benzoate Natural flavorings

Proud sponsor of the U.S. Olympic Team

All aluminium can

Toll-free help number

TABLE 2.

Performance ©

Classic Coca-Cola Calories (per 12 fl.oz.) 144 Sugar (grams/12 fl.oz.) 37.20 Caffeine (mg/12 fl.oz.) 46.00

Coca-Cola

Coca-Cola Diet Coke

Diet Coke Mountain Dew Yes Yes

No Yes

No No . Yes Yes Yes

No Yes No

Mountain Dew 154 0 179 40.00 .30 44.40 46.00 54.00

of specialized competition. Various tests provided some pretty medio- cre scores for what has traditionally been considered by the general public the most high-powered cold liquid stimulant (unless you favor cold espresso).

Documentation is thin for Clas- sic Coke drinkers and thus tends to favor users who have some famil- iarity with the product. What’s more, the toll-free help number was not printed on any of the cans we tested! While clearly a stalwart and founding member of the caf- feine collection, advantages offered by a number of competitors may be worth a taste before settling on the real thing.

Dr. Pepper While barely edging out Pepsi in caffeine performance level and

Pepsi Dr. Pepper

Yes Yes

THE ZX BREADBOARDER PROJECT 2: THE DIGI-—DUBBER

DIGI-DUBBER by Fred Rachbaer

March 1939

PARTS LIST Ci - 228 pF. dise

C2 - 60 uf. dise D1-03 - 104144 or 189148 Ri - @ ohas, 1/4 Hatt

R2,R3,R6 - 1608 ehas, 1/4 Hatt Use BIGI-ONBSER te make R4 - 16 Koha, 174 Matt high quality duplicates ot 713141

RS - 180 Loba, 174 Hatt

51 - SPOT slide or toggle

T1 - 568 cha CT te $ ohu audio output traastorner

5190871515406

= support. 3 mini-jacks or plugs mith cable |MOAITOR jack eptienaL.

Pert-beard

THE AMAZING DIGI-DUBBER

I’m sure that the USUG finds ¡itself in a bit of a predicament. I loaned my entire collection of 2X81 programs, pictures and other files. How would one librarian make copies of well over 500 files, without growing old before the project is completed?

In these days after the gold rush, we all could benefit from a quick and painiess way of making copies of library tapes. There are several options:

1) Use an attenuator cable (available from Radio Shack) to copy from one deck to another.

2) Use a home stereo or "boom-box* double cassette deck to make an audio dub.

3) Load each program into the computer, then save it back to another tape.

Option #3 is by far the most reliable. The reason is that audio dubs don’t really do justice to digital signals. If you “scope the output of a typical cassette deck, you'll find that the amplitude of the pulse train is by no means constant. This “sagging? effect becomes more pronounced when making an audio copy. Furthermore, drop-outs tend to be aggravated, often to the point where the copy simoly doesn’t work.

What we need is an ‘attenuator cable* that emuiates the Denavior of the comouter in saving/loading tape signals. DIGI-DUBBER does exactly that. The signal on copy made using DIGI-DUBBER ıs indistinguisnabie from a signal generated dy the 2X81 directly.

Figure 1 snows the schematic diagram of DIGI-OUBBER. Here's row it works.

Resistor RI limits the current into the input transtormer, T1, and makes the input to DIGI-DUBBER look mostly resistive Comitting it Caused Dizarre spurious responses, presumably

tapes. Hire it ep ena

Transformer Ti does several things. Most importantly, it isolates the two cassette decks, avoiding any possibility of ‘ground loop‘ problems. It also boosts the signal voltage, helping to insure that we can process the analog Signal into a good approximation of a (digital) square wave. Further, its limited frequency response is used to advantage, to help prevent both low-frequency and high-frequency noise from reaching the recording deck.

The signal from Ti is then half-wave rectified using diode DI and resistor R2 (or D2 and R3). The use of a rectifier on both halves of Ti’s secondary Keeps its current (and therefore the current reflected back into the primary) symmetrical, reducing distortion due to non-linearity. Switch Si selects the “input phase;* in otherwords, whether we're selecting the positive or negative excursions of the signal.

The reason for this switch is that most decks will falsely give an extra pulse in each pulse-train in one phase (usually but not always the negative phase). This corruption leads to later difficulty in loading. I’11 describe later how you determine the proper setting for your decks.

The rectified signal is then clipped by resistor R4 and diode D3. Across D3 we now have a constant-amplitude square wave (or reasonable fascimile thereof).

Finally, capacitors Ci and C2 and resistors RS and provide a two-pole filter that matches the transfer characteristic of the similar network in the 2X81’s SAVE circuitry. Going to the dubbing deck we thereby have a signal that "looks* as if it were being sent by a stock 2X81.

Note that DIGI-DUBBER is completely passive; it does not need a source of DC power, as did my earlier “Load conditioner* designs.

BUILDING DIGI-DUBBER

Construction is straightforward. I built mine on a piece of perf-board. Transformer Til is readily available from Radio Shack and elsewhere. It is a 500 ohm (center-tapped) to 8 ohm “transistor auaio output transformer," used in reverse. I used a sub-mini version rated at 0.1 watt, but just about any size should work fine.

The diodes are the ubiquitous 1N9144/1N4148 giass silicon types. Radio Shack selis them at 50 “or 53 (this ts even better than the prices at most wnolesaie joobers). The resistors and capacitors are similariy ‘garaen variety.‘

Switch Si can be virtually any Kind of SPOT switch. I used a pusn-putton switch Salvaged from a “dead body" in the junk room of the stereo snop where I work.

Note that the “MONITOR” cable is simply an extension of the INPUT cable. This is so that you can simultaneousiy load the program, or use a *header-reader* program like PNR to make a listing

USING DIGI-DUBBER

DIGI-DUBBER is intended for copying tapes. It is not meant as a load-conditioner or a Panacea for lousy tapes. However, if the original tape loads normally into a stock computer, DIGI-DUBBER will insure that the copy will also.

Connect the INPUT plug to the EAR jack of the Source recorder. Connect the OUTPUT plug to the MIC jack of the deck being used to record the copy. Optionally, connect the MONITOR jack to a stock 2K TS1000 (running PNR) to get a listing of program names and save/load times.

Set the playback deck’s volume to about the same level as you normally use to load tapes. When using DIGI-QUBBER, it is better to err in the direction of less signal. I found settings between S and 7 (on a JIL JT1115) to be ideal. Too much clipping (i.e. high volume settings) may Compromise the integrity of the copy by generating Spurious pulses,

Start the playback deck with the source tape, and the recording deck with an object tape of the same or greater length. And away you go.

The first time you use DIGI-DUBBER, you will have to determine which of the two switch positions are appropriate for your setup. The best way to do this is with an oscilloscope. First make an original tape from a stock 2X81. SAVE a large blank array; e.g. DIM AS(12000), then SAVE “ARRAY*. This will give a large section of tape with only 0’s on it, making it easier to see on the scope.

Connect the ‘scooe’s input across diode 03. Play back the portion of the tape with the steady-sounding array data, and adjust the scope‘’s vertical gain and horizontal frequency for a steady image.

Experiment with the switch in

1 REM 136 SPACES aesszeeeeeae RBRRERRRRERERRRRRAREBREREREREAE IBBBBRRRRARRRRRERERARREREERERES

both positions. On

most decks, you’ll find that in one position you will get four pulses in each pulse train, with a level that is largely independent of the input level. This is the correct setting. In the other position, you'll count five pulses per train, or you will count four pulses over only a Narrow volume range.

If you don’t have a scope, set up the system as described above and connect an earphone to the EAR jack of the recording deck. Put the recording deck into RECORD mode, and play a tape on the playback deck. Flip the switch while listening to the signal. In one position, the signal will seem louder and may appear to have a‘lower pitch; this is the WRONG position. In the other position, the signal will seem clearer but a little quieter; this is the PROPER position. Make note of this position.

Setting the optimum playback level can also be done using the earphone-moni tor approach (or by turning the monitor switch ON on a deck that allows monitoring through the speaker). As you increase the volume from Zero, there will be a relatively large range (typically from about 4 to 7) over which the signal sounds essentially the same. Beyond this, it will sound noticable “harsher,* due to Clipping. Again, you could use a scope for a more scientific approach. Just below the point where this clipping starts is the ¡deal setting. Your recordings at this setting will be undistorted, and relatively immune to dropouts.

One final note: when copying library tapes, or any tape for that matter, be careful with head azimuth alignment. Align the recording deck toa standard test tape, or failing that, to a GOOD QUALITY pre-recorded audio tape. The noisier, the better; heavy-metal is great for setting azimuth because of all the high-frequency noise.

Adjust the playback deck’s head to the tape being copied. It is therefore good practise to always use the same decks for play and record; the record deck’s azimuth alignment will be “known good,” and the playback deck’s setting will *slop* as required to match the source tape.

PROGRAM NAME READER Prints name and loading time of 2X81 files POKE data table into 1 REM

229:205:136:064:024:251:014:001: 006 :000:062:127:219:254:211:255:

RRRRARAL AREA AAA AAA 135 60SUB 300 031 :048:073:023:023:056:040:016: ppp 140 GOTO 28 241:241:186:210:229:003:098:107: SAEN A SA a = "PNR" 205:136:064:203:122:121:032:003: 3 E 205:228:064:035:023:048:241:201: a e da 202 PRINT * PROGRAM NAME READ 052:021:033:009:044:080:205:136: ER, VI" EHER start tape +4 064:113:205:252:001 :024:246:213: ri a aaa rs 030:148:006:026:029:219:254:023: p = À 203 IF USR 16618(2 THEN GOTO 20 li AA ET T= 3 ¿09:123:123:006:243:014:245:209; pe rin 205 5OSUB 300 read O 100 219 PRINT © "TAR 34 31/:048:123:201:201:167:040:187: 55 LET T=T51 o PROGRAM NAME" ;TAB 26 207:012:245:230:043:215:241:201; 30 30T0 50 "312 ON 001:000:000:017:000:016:027:122: 100 LET S=72.4114 25 0 A6 179:200:219:254:007:048:247:003: 110 LET MINT (5/60) pc 027:122:179:200:219:254:007:056: 120 LET S=INT (5-401) 300 SCROLL 247:024:235:000:000:000:000:000:

130 PRINT TAB 25+(M<10) ¡M3 *:*;« “9" AND 5(10);5 320 RETURN

310 PRINT AT 21,31;* "AT 21,0;

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1100 LET ADD=450900

1200 LET A1=ADD+77: LET Bi=A1+3: LET A2=INT (A1/256): LET A1=A1-— 256*A2: LET B2=INT (B1/256): LET Bi=B1-256*B2: RESTORE 1800: FOR F=ADD TO ADD+106: READ A:. POKE

F,A: NEXT F: RETURN i

9080 REM SAVE PROGRAM

7010 SAVE "CORRECTOR" LINE 100

- change ADD for any reasonable address (32768-65400) Y minimum!

BOO COOK EOK

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11

TAPE CORRECTOR by Kristian Boisvert

This is a tape reconditioner. I know there are quite a few around but this one is different - it works! I received some PD software from a friend and had an awful time trying to load the programs so I decided to work on the problem. I think I've found the solution.

Just type in the program and then RUN 9999 to save. To use you must have 2 tape recorders. One will "play" in the EAR of the computer and the other will record from the MIC. This program even works on programs saved in Fast Save (2+FAST, Turboloader)!

@>REM TAPE CORRECTOR WRITTEN BY KRISTIAN BOISVERT COPYRIGHT 1988 BYTE POWER

100 GO SUB 10920

200 CLS = PRINT *’?TAB 93"TAPE C ORRECTOR"’’ TAB 23"WRITTEN BY KRI STIAN BOISVERT"3TAB 83CHR$ 1275"

1988 BYTE POWER"

300 PRINT AT 10,05” INSERT ORIGI NAL TAPE IN TAPE"? “RECORDER 1 (E AR)" .

400 PRINT ”"INSERT BACKUP TAPE IN TAPE”” “RECORDER 2 (MIC) THEN PRESS“? "RECORD..."

500 PRINT *"PLAY TAPE RECORDER 1 THEN PRESS ANY KEY...”

600 PAUSE Ø: PRINT AT 10107731» 1137773737)73137937> 708 PRINT AT 12,43"RECONDITIONI NG SIGNAL...” 809 PRINT AT * TO STOP..." 922 RANDOMIZE USR ADD 1008 DATA 243,58, 141,92, 245,238, 7187, 241,230,564, 31,31,31,198,8,9 5,205,B1,B2,33,21,4,16,254,43,12 45181, 325249, 205,A1,A25 6,156, 205 141,42,62,198, 184, 48, 230, 34, 32,2 431 6,201,205, B1, B2, 120,254, 212,4 8, 246, 205,B1,B2, 48,193,6, 176, 205 1A1,A2, 48, 186,62,203,184,6,176,4 8,244,24,240,205,B1,B2,4,200, 62, 127,219,254, 31,48, 15,169, 230, 32, 40,242,121,47,79,122,83,95,211,2 54,55,201,251,207,20

18,45"PRESS ? BREAK

APPLE SUES APPLE

Apple Corps Ltd., owned by the three surviv- ing members of The Beatles and John Len- non’s estate, is suing Apple Computer Inc. of Cupertino, Calif., over alleged misuse of trademarks.

The dispute centres on a 1981 agreement between the two companies specifying which products could carry their respective Apple trademarks. Apple Computer agreed not to use the name “Apple” and its logo “in rela- tion to apparatus specifically designed and intended for synthesizing music,” or on any related printed matter, software or services.

Apple Corps contends that Apple Com- puter has marketed and licensed several such products, including Macintosh micros and an Apple compact disk player. It wants the U.S. company to remove the music com- ponent, or change the name and logo used.

z>mno a-17- OFT

The Vancouver Sinclair Users Group has been in existence since 1982. We are a support group for the owners and users of all SINCLAIR and TIMEX computers.

Pres:- Gerd Breunung PH#(604) 931-5509 V/Pres:- Glenn Read .

Sec:- Harvey Taylor

Treas. & N/L Editor:- Rod Humphreys N/L Publisher:- Rusty Townsend

Our membership dues are only $15.00/year and may be sent to the Treasurer:

Rod Humphreys 2006 Highview Place Port Moody, B.C., V3H 1N5

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ZXAppeal is distributed to approx 30 other T/Sinclair User Groups throughout North America as well as overseas via the NETWORK.

NETWORK correspondence may be directed to the Editor at the above address. ]

Copyright of all articles appearing in ZXAppeal is retained by the author with the understanding that other T/S User Groups may reprint any article appearing in ZXAppeal provided credit is given to the author and VSUG.