XXX X X X) ODOOOODODDDODDOODOOCOGODDOODOODODODOGOOCOODDDODDOUODÉO(OQOO0DC(COED DDDODGOOGOODOODOU(O(!N = > s p e = 1

JOGO IIIB IDI OI DIDO ክስ ን፣ን፤፤፤ጀጀ ጀጀ ዛዙዝ Nov ‘65. Newsletter of the እን 1.50 AAAAAAXAAAAAAXAAKKAAXAKAXAAAXAAXAAAAAAKAAAAHAKAAAHANAAAAXAHAAAAHAXAAAAAAHAK

VANCOUVER SINCLAIR USERS GROUP TERIOR GIO HEI EIEIO HEE

XNXXXXXXXNXXXXXXYXYXXXXXNXXNXXXXXNXXXXXX

x x

x x

x Next Meeting X In tihis issuer x x We revisit the sieve.

X Killarny Community Centre * We test for booze.

x 6260 Killarny st. Vanc. * We 2068 with Bob and Guido. x * And the ZX becomes musical. x Nov 8 7 PM *

x *

x At this meetings, #

X Soldering and soldersuckins

x by Bob Dennison *

XXX X XXX XXXXXXNAOOOOOQOO0000OOOOCOCXGEGE

ZXAppeal is a monthly

newsletter put out by the

Vancouver Ginclair Users Group.

For more information on the

club and ZXAppeal see the backcover.

In order to ‘beat the deadline’ N material for ZXAppeal may be እን send directly to the editor

2308 Marine Drive

West Vancouver. B.C.

YZV 1KG.

Marcio Vieira ‘the Pres.’

can be reached at 9764-8693

MY QL,s HERE!!!

EDITORS PREAMBLE

I'm telling you this year is fading fast. November.. December.. Halloween.. Christm... Oh well you know the routine. Anyway we all got together at our last get-together and we did stuff. Mr V opened at about 7.19 and told us. right away that the due,s will have to be increased, ah well we knew that didn't we there are costs involved in keeping even a small organization such as ours running. The figure bandied about was $15.- which is really not to much considering. Oh by the way the membership fee for the community center turns out to be $3.- so there are a few regulars who owe me a dollar, you re mavhelous dallings an you know who you are. You owe me the dollar, by the way, because I somehow got dragooned into taking care of community center business.

Bob Dennison, Al Smith, Rod Humphreys and Ken Abramson are taking Karl Brown,s Robotics course at: VVI and we have been promised a presentation of the wonders wrought sometime in the near future.

Peter Pollock, he of speed loader fame, tells us he is now making an honest living working for a company called Automatic Vision. They are developing a vision system, for use in robotics, completely in hardware. It turns out that looking at something in real time just cannot be programmed on an ordinary 2X81, no not even in FAST mode.

Looking at something and interpreting it is something even supercomputers have trouble with which means that our own brain either uses parallel processing or the whole thing is programmed in, Gare IJ say it, wetware.

Yea I know, you to buddy.

(2)

Wilf Richter is still on top of his memory bank switching scheme. If, nay when, everything works and one installs the maximum memory allowed under this scheme one could find oneself with 256K of ones fave programs resident in ones computer how does that grab one?

Oh by the .way, at last count, according to Harvey the T, there were 160 QL,s in Canada. Give or take 60. A large concentration of these elusive machines is apparently to be found in the Okanagan which is a beautiful valley in the interior... Of B.C... You know.. Canada. Oh yeah well it so happens that I DO know the Capital of Lousiana. I’ve got “Capitals" for my ZX.

Anyway talks of restricting hunting in the Okanagan are apparently in progress at the highest levels, while Greenpeace is said to be organizing a boycott on the sale of QL hides, endangered species and all that. Harvey Taylor also tells us that he spied a text to speech system at the Tandy store, it involves an existing speech chip and a ROM with some clever text to speech algorithms in it. Harv would like to play with said T to S system and wants to know if anybody else is interested in which case he would be overjoyed if you would let him know.

Dave Ross has for sale some Jupiters, these are the Forth machines build on the same scale as the 2X81, which reminds me. There was this old forth and... What? This piece is already way over its silliness allotment OK 11 try and keep it straight from now on. As I said at the beginning, the year is fading fast, and so am I.

Cont.Page Ó

ERASTOSHENES REVISITED

Cast your mind back to the April issue of ZXAppeal and remember.

It was then that we introduced old Erastoshenes, and his sieve, to you. It had to do with finding prime numbers,.. ah now you remember. In the mean time Ken Kenny presented us with a program

to confirm prime numbers and now ול‎ Harvey Taylor goes all of us one 259 IS D better with a machine language

prime sieve for the .81א2‎ Are we a prime bunch or what? P PR

Playing with Electricity - H.Taylor

Since I got my QL, I have been curious just how it stacks up in terms of speed. In the back of the M68000 Programmer's Reference Manual there is a complete listing of the number of Clock periods for each instruction. Because of the richness & Variety of the 68K addressing modes, most of the variation is

attributable to the sddressing mode; not the instruction itself.

Well my cat was dead & only satisfaction would bring it back: 80 I ran a few benchmarks. If you do not know about the Sieve of Eratosthenes, you can read up on it in Byte Jan/83,page 283 & Aug/85, Page 33. In short the program (see listing below), finds the prime numbers between 3 and 16387. There is a good description of how in the «ህደ» Byte.

So the results. For comparison I ran the program in the 2X81

too.

MACHINE LANGUAGE TINE (seconds) ZX81 Basic (FAST) 448.

ZX81 Basic (Slow) 2852.

2x81 Assembler (Fast) 1.3

2x81 Assembler (Slow) 8.3

QL Superb:sic 276.

QL Assembler 0.76 IBM3033 Assembler 0.0078

Cont next page

(3)

SIEVE OF ERATOSTHENES ZX81 ASSEMBLER

END (4284)

GF ARRAY

LD BC,aese 555 6

DE NOMEMORY R ən , ITERRTI

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JR NZ ALOOP

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MLOOP LD HL, : 4010)

$4842)

É , DE

CF HL 1

JR 2 NEXTI LD HL, (42840) HL,DE HL

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, HL. ooo

ADE ו4044ו1ם1‎ ኤር BC

i8 REH

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105 IF ፲=5 THEN 58 118 IF ጸ(፲) =8 THEN 120 LET iE=2

130 LET kK : 149 IF K:SIZE THEN BOT 8 158 LET BIER MO isa LET אבא‎ 70 GoTo 148 13a LET COUNT=COUMT+L

198 HEXT I

280 PRINT HT 11,0; “FINISHED: OUNT ="; COUNT

zie STOP

220 SAVE "SIEUR"

230 LIST

(4)

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COUNT =

by R. Lussier 5 R. Brown cE! 5፻ oti ait a i i £ 5 AL i ord, a E na a c C f forgot any appotcay. | The 34 fair 5 i EZS f £ cup, Le bit 4 6 = ርና FS Baas an -TS 2 a few Micradrives. The ¿asti sented at the aga. Many PEOF prized to see fient there was clair iine of the people sta us as an extirn were surprised us doing quite ALi in aii the fair very well and > gere ha iet people kn that uer around. Long the Ti Clair compute Lets h hat next year u with again &€xhibitor with the Fair, à t gii the com- Puterz in o 6 will be repre sented. Hin T 1 1 1 4 | 1 11 111 1 1 2

There was ב‎ Product at the Fair which caught mu eye. This was a Smoked Piaztic Ke 'gboard Cover, Some of the features are חבם|ו1)‎ be used under the compu- ter,monitor,printer,ettc. 5 an angled riser. igiManuracture with a special additive th cannot build-up static eiec icity, a poten- tial threat G sensitive Cir- cuits. {BiPrevents ke id; Easy-titt h resistant r This unit t fits perfecit iu on the TST ss computer. The model No. PFSE4H and the Price is CAN. SS5+iax in B.C. For id include the Postage. t item 15 fiom Computer 104 ₪. תח ב‎ = UBS פצ1‎ ht one For my new P ססטם‎ and it 55 Look adds that exira touch and protection. 50 io

(5)

The following interesting short program for the SPECTKUM might be suitable for

the newsletter.

n.b. The Printer must be OFF

10 CLS: FOR 42 64 TO 87

20POKE 23681,1

30 LPRINT " VANCOUVER Sinclair 40 NEXT 1

50 PAUSE O

Group"

I don't know why it works!

Anon.’

. © ——

. wesw —sO

n i have numerouz Hints, Tips Fortes, ከ885 & Solutions (from various fagazines) to make it easier to play the SPECTRUM games Listed below (over 108). If anyone would Like any

information plesse call

+ Bilt Rutter 434 8367 + Bh Diddumsz -RHiien = Android -Andr Gid = Arcadia -Astro Blaster Htic Atac -Avalon Backpackers Guide-Bored orRinas Bouiderdash -Caveioan Chiller -Chuckie 3 Classic Adventure-Colassal Adv. Cookie -Crupt Derenda -Doomdarks Rev Dragontorc or Avalon Eric the Viking -Eskimo Eddie Everyones a Watiy-Eureka Eye or Bai -Fait Guy Fantasia Diamand-Finderskeepers Frankenstein -Fred Freeze Bees -Funhouse Ghostbusters -Giants Revenge Giliigans 43 - 1 5 Ground Attack -Gyron Hobbitt Horace & the Spiders Horace Goes Skiing House that Jack Built Hunchback -Jack& Beanstalk det Set Hilly -Ket Trilogy Knight Lore -Kniahts Quest Kakaotoni itr -Kosmic Kanga Lords or Midnight-Lazy Jones

Lords or Time -Lunar Jetman Manic Hiner -Maze& Death Race Monty 35 Innecent-Montu Mole

Hoon Alert -Mardons Guest

Hr. Wimpy -Mugsy

Hutant Hontu -ürbiter

Pharaohs Tomb נגם-‎ 43 n-ere -Project Future

xiMicromani

1% -Psutran

Pujamara -Puramid

Guest -Red Hoan

= br gtuu L F -Scubs Dive

sherlack -3ir Lancelot

> d Ranger -Smuggilers Cove

: cuba 1 i -San af Blagger

ectacie -Stap Express

3 tem 1538 -Technician Ted

-TormnadaoLaouLevelL‏ 43 גך

Trans Am -Tutarnkhainur

tinderuuride -iIa 16

38 66 |16 -lli Ld zt Hera

Wizards Lair SOX

Zip Zap

הצע

GAMEDAY, ዝክኃ WILL ALL BE DONE BY COMPUTERS

From Page 2

Arbie Fru, the treash, came in to tell us that we are getting, ahem low on dough.

I am sorry.

Isn't it a coincidence though, I mean here we are told by mr V that the dues must be raised just as Arbie tells us he needs more money. Isn't it great how everything in nature always balances out.

I have been promised by Bob Dennison that he will do a solder and solder suck demonstration for us at the November meeting. I happen to know that Bob has worked years at his solder sucking skills. You see he has this specially developed asbestos tongue sock and...? What, you don’t believe it, so come to the meeting already.

Paul (the Editor) Ruiterman.

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SOUND lagain?i: bu Guido ህ1ፎ1ር= GIPCE WU 55+ ማጋ ፒንር ርፎ £ inztruction GUT 245 will I had the g d fortune of gram the sound chip with the Purchasing Spectrum H ister you want.Ex OUT 245.7 England, AS m as it i L give the chip the ክቦ v and I to wor truction ta activate register Switch of wr. It "= OUT 246 iii Load the being work לבשטפתם.‎ ister wi the 5160 walle. thi as b done I d OUT 246, to tch iiith the SP חט‎ discovered zewera The ספב‎ L gz 6,56: £ comm Li wth 1 got the Foil had ז‎ 9 tov it aritfu decided to t Some 28 Spe 1 1 rams. To mu = Prise 50 Surprisgi) it Loaded P (HOW!I Tt aiso ran perfe talking about the soun - strckstono. This was oni with the Or tru this machine code Prams such 55 Penetrator a me Gate (2865 i8 OUT 245, 245,55 versioni. go OUT 245, 246,15 E) Upon this Covery I decided 30 GUT 245, 246,15 to Find out why this happened 45 OUT 245, edé,! and discovered first how ta 58 FOR 1ב‎ OUT operate the sound chip from t T ž45, 2.: 007 BUT, 1 Spectrum ROM and then tater UT 245,4 .ዌ8>3፳ to use the joy stick, X ime we“ ii talk about the Before I go into the JOYSTICK Port. actual program I shall tell you how this is done: First you have ta realize that the 2068 haz sound chip and that this 5 Chip alsa has a Single bit "Port".It is through this that the joystick port is connected.The only way to instruct the chip From the Spectrum ROM is bu the OUT command, ,Thg OUT address for the Chip is 245 for the register and e46 for the vaiue.Now I'm no a ing to expiain what the 5 Manual says about the chip how to program it,but I wi tell you how to use those numberz up above, Hote:read the 2868 Manuali חס‎ sound if you don’t know how ta use the so d command

The 5131s integrated sound chip.

(8)

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The GL Report - by 8. Lussier RE Nr

Sinclair has finally decti- ded that they will mow have new Authorized dealers selling the QL computer, The 15% authorized dealer appointed bu Nigel Searie of Sinclair is the English Micro Connection, 15 Kilburn Court, Heuport, RI 82546, U.S.A.

The computer will zeli for ttt US $455,820 £x, This Will include a Serisi to Centronics converter, a Touch & Go Typing Tutor, & an ne Finance type Package. H t OF $175.08 in Canadian fun US $125.80 af Freebies. H deal.

If you a terested in š catalog, don’ itate to write and ask far dq alil reports from Britain rice of the and other Si Products will be reduced f 55ቨሽ. The Spec trum Pius is reduced fiom £129 to £98 miliar Savings on other Sin products, 5a Look for som deaizs in the near future,

388 CLEAR sac LET =z sas FOR 318 RES TO £48018 xT n ase DAT ,IMT izz 5 שכם‎ LET 22 8 248 NEXT f שפם‎ PORE C4244, 281 =ፎሯ IF INKEYs="" THEN RANDOHIZE USR 648028 S1@ IF INKEYsS<:"" THEN GO TO si a 320 2ሯሯ 25a gibirn" ase gGibirm" "CODE S2088,258 ee

For catalogue 16256 cantact:- Earl HcGhee,

Suite 557-21,

10485 Jasper Ave.,

Edmonton, Alta

ሯጆጻ23 ,ፐ=3መፎሯ Drive Controller deiasiirz and price.

Larken Electronics,

= HZ,

Havan, Ontaris

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Hany 2ጆ፳መ3 ,ፐ=3ፎፎሯጅ,ፍ TS5i5800 prod. Such as Ram packs, Speech packs Reyboards, etc. Urite for their catalogue,

251; 8

Hoorzhead

25 DOveriea

Suite Sai,

Toronto, On

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TH ፡8ዝ- tm rn

nr information to the above: - Orion Electronics,

4@ Lancaster ST. Mest, Kitchener, Ontario HoH 4223

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PRESENTING TADA!! ***BEETHOVEN***

Or rather, the opportunity for you to behave like him on your 2x81. Yes indeed I have the privilege to present to you a devilishly clever little program which turns your 2X8] into an acceptable organ, an organ by the way which can be tuned by you. I do not know where I got this program from, I found it among my stack of machine language listings copied from a book or a magazine.

As you can see I have adapted the program in such a way that the BASIC,S among you can play along with the best of them.

In order for you to turn your ZX into an organ just enter the BASIC program as you see it and RUN it. Just make sure you reserve at least 80 bytes in the number one REM statement before you RUN, after you RUN the program once the REM statement should look as in the listing. The layout of the keyboard mimics that of a real keyed instrument, you have two octaves to play with, the letters with the "^" beside it represent the black keys on your piano. The music will come speaker of your TV, You might have to tune your TV a bit. If you use a monitor or are looking for a better quality sound the signal is also available at your "mic" port, after all it is the "LOAD" routine that we are messing around with here,to make sound,in the first place.

In order to tune the individual notes you can change the values in the A$ at line 100, these values are ofcourse in hex and you can see in the accompanying table what key corresponds to what value. In order to increase the frequency of a note you must decrease the value in AS. To get out of the program after your

composing session press Shift 1. You all have fun now.

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