Your Commodore - Commodore Is Awesome

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Homework - answer I MACHINE CODE 1000 *- $C000 1570 TA? 1010 BUFFER 8 3 0 1580 JMP LOOP4 ; NEXT WORD 1020 CHROUT - $FFD2 1590 NOTFOUND LDA #MESS4 1040 PRINTMESS - $ABlE 1610 JSR PRINTMESS 1050 PRINTNO - $BDCD 1620 LDA NcBUFFER 1060 COUNT - 899 1630 LDY #.>BUFFER 1070 1640 JSR PRINTMESS 1080 1650 RTS 1090 LDY #0 ; INITIALISE BUFFER 1 6 6 0 FOUND LDA #MESS1 1110 LOOP5 STA BUFFER,? 1680 JSR PRINTMESS 1120 INY 1690 LDA 4BUFFER 1140 BNE LOOP5 1710 JSR PRINTMESS 1150 LDA 4147 ; PRINT PROMPT 1 7 2 0 LDA 4MESS3 1240 BEQ LOOP2 1810 JSR PRINTMESS 1250 STA BUFFER,? 1820 RTS 1260 IN? 1830 1270 JMP LOOPI 1840 1280 LOOP2 CPY #4 ; IF WORD LESS THAN 1 8 5 0 TABLE .ASCI "TAKELOOKSINGEAT BITEKILL" 1290 BCS LOOP& ; FOUR CHARS THEN PAD 1 8 6 0 .ASCI "THROLIGHORINCLIMSWIMFICHDROP" 1300 LDA #32 ; IT WITH SPACES 1 8 7 0 TABLEN .BYTE 13 1310 STA BUFFER,? 1880 MESS1 .ASCI "THE WORD " 1320 IN? 1890 .BYTE 0 1330 JMP LOOP2 1900 MESS2 .ASCI " IS NUMBER " 1340 LOOP6 LDA #0 ; TERMINATE BUFFER WITH 1 9 1 0 .BYTE 0 1350 STA BUFFER,Y ; ZERO 1 9 2 0 MESS3 .ASCI " IN MY WORD L I S T " 1360 LDA #13 ; CARRIAGE RETURN 1 9 3 0 .BYTE 0 1370 JSR CHROUT 1940 MESS4 .ASCI "I DON'T RECOGNISE " 1380 1950 .BYTE 0 1390 1400 LDY *0 ; INITIALISE WORD COUNT 1410 STY COUNT 1420 LOOP4 LDX #0 ; SEARcH WORD TABLE 1430 LOOP3 LDA BUFFER,X 1440 CMP TABLE,? 1450 BNE NOMATCH ; DOESN'T MATCH 1460 INX ; IT MATCHED 1470 IN? ; TRY NEXT CHARACTER 1480 CPX 04 1490 BNE L0OP3 1500 JMP FOUND ; FOUND IT! 1510 NOMATCH INC COUNT ; INCREMENT WORD COUNT 1520 LDA COUNT 1530 CMP TABLEN z ANY MORE WORDS TO CHECKPR1NT 1540 BEQ NOTFOUND ;NO 1550 ASL A ; BUMP COUNTER BY 4 TIMES 1560 ASL A ; WORD NUMBER • 3) If two words are found, the first is a verb and the second a noun e.g. TAKE SWORD, EAT SK AK E. Extract the verb and move it to a buffer starting at VERB and put it's length into VERBLEN. Similarly move the noun to a buffer starting at NOUN and its length into NOUN LEN. Consider this simple method of text compression. If you use just 32 characters, you only need live bits to save each character. This being the case, you can save three characters in two bytes giving 33% saving in RAM. Consider this example: Character I — %000IIIII Character 2 — %00010101 Character 3 — %%0001 lol l 'I his compresses to: Byte I I 111101 and Byte 2: %0I110110 As you can see, character I now YOUR COMMODORE november 1986:88 occupies the top five bits of byte Character two occupies the bottom three bits of byte I and the top two bits of byte 2. Character three occupies bits I to bit 5 inclusive of byte 2. Bit 0 to byte 2 is set to zero. Your task is to: I) Develop an algorithm which performs the compression. 2) Write a routine to do this job using so far as possible logical shifts and rolls and boolean instructions such as OR and AND.
P P . A 0 • 7 TELETE\ i _c t C 0-r A world of information i a t your fingertips The Microtext adaptor turns your C84 or C128 into a Saph isticaled Teletext Receiver Giving you a full Colour display or any of the free pages from Ceefax or Oracle. There's the latest a news and software reviews, football results and gardening tips, whets on TV plus Fmuch much amore, hundreds of pages constantly updated to give you i he very latest information, P at the touch of a button A page like a recipe or a weather map may be saved to disc or cassette tor later reloading and pages e may be accessed by your own programs so you COvId plot graphs of share movements or load the latest result sallo a pools predictor. the Possobi titles are endleSS Supplied with a manual the adaptor is cased and fi ts neatly on the user port of Ow Commodore. s A connecting lead goes to the -this concept means an extra aerial is not required, channel selection is done on the VIDEO video which e O saves U T us ' components and saves you money' r fe s o c k e t o ONLY f 459.95 inc P&P. s aFrom:- n y v ei e dr t MICROTEXT e o r e c o r d e r TO iucti ty 31/ 71- BoxED 10 , icr 19 1. odi ti so_ ko_ s ILWN110 1IIKEEMILM 1bb,_ 1 07 10 -APISOFT 3"CF2 Plicrodisks L32.00 +clop siNGLE 5 -L 48ELS etc-- 135 Let DOUBLE SIM J: 3 C24 5 +rip, 1: •-0 1 c Osf o 9,3 ai , 0 e .W111171 c 0 .-- / t - ) --' , I -( 141,1 U 1 , , U n 0 S 0 Compumart i ( D e leics p t , tElliEH Y 6 4 ) E 1 1. 0 S I 3 r t . o d t . E L c i t r e o , l l c o n a S t , L o u g h b o r o u g h , r soic' te ' w•orit• 2 6 2 2 5 9 Atiol DISCOUNT SOFTWARE C16 Plu• 4 Commodore 64 I Me RRP OUR Tide P R P OUR Commando 795 ACE IC•161 995 ACE M os 4) • • • . . 10.95 Steve Davis Snooker . 7 95 Jump Jet 995 World Cup Football 8 95 Guillermo Falcon 6 9 5 Anirog racoon's Four • . . 7 95 C18 Classics II 995 Atlantis 6 95 Grand Master Chess 4ciel 895 Grand Master Chess 'Plus 41- .. 895 Tom Thumb 5 9 5 XRrgions Revenge • „ . . ...... 6.95 Beach Head • . .. .. .. 7 95 Defence 16 . . 7 95 5 95 7 95 8 9 5 5 9 5 7.95 5.25 2.99 5.95 7. 95.28 5 7•25 25 5 25 2 99 4 50 5 95 Dombiack 7 9b 5.95 Mercenary 1 1 95 7.25 Jet Set Willy 7 9 5 5.95 AirwOlt . 6.95 5.25 -_egfonaire • 6.95 525 Winter Event• . 7 95 5.95 BUDGET S01.1 WARE We stock Mastertronic. Solar, 609-Byte F ,rebird. Players and inlareadlOt tot ail Clara reodore computers including Vic 20. C8A164 C 16 Plus 4. ell at Discount Prices Send Stamped Addressed Envelope for FREE List State Micro Cheetah 125 Joystick • ..C.8.95 Pro 5020 Joystick • 1 1 1 4 . 6 8 i-roe C18 adaptors with each loystick All Prices include postage and packing in the UK Ostarsaa. E l ch ad 0 o0 e o r epostal l m wrier please a toP w i t h a y o o e n t GRAFFIX o 114 West r Main , Street, Whitburn, West Lothian EH47 001) S r , h v WEST YET! n7 Birdlip Place, Horndean, Hants. P00 9PW Tel: 0705-595694 d - c h I e q " u e s FREE! Buy 200 disks 4 / and get a tub of 5.25" 'Universat' p suits att drWes - screen/computer wipes o SSSO , SSOO, OS00, 0S00-96. SSD° Or OSOD P1/4\‘ s E 49.99 - clisV.s 100 E/39.99 ore/59.99 - 100 disks t C26.99 - 50 dislks C 75.99 or C 85.99- 50 disks a El 499 . 2- 5 n &As t v l . Same C 39.99 day ore despatch 49.99- - 25 (Is 1 Cheques or orders to:- ,s l *Lite-tArfleg No Ouibbte \Narra o *1-Aub-rins,tutt spec. Dept YC r *1\to Extras-vat &detWery inctuded Direct Disk Supplies Ltd Lowest wil FREEPOST d & branded prices - T 29 Dagmar Road e Official r ry ry orders usvery welcome Kingston, Surrey, KT2 6BR. s ! t o CUT-PRICE DIS DIAL•A-DISK Z*01-541 1144
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11111111 YOUR BEST INDEPENDENT COMM
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1 REGULARS FEATURFq Irl V L U M E 3
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11/11 - fl E S Tt r Ha i gT h t Ei
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I I I R T fl S T F I T E U E N T E
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'44%4 4 , L a p 4 ., _ ,• 241 .
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Crystal Castles Diamond Plateaus in
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A wmay seem like a strange concept
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C64 LISTING 11 I i ' Please read 'L
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11111111•11DIMENSION 27/29 High S
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Drive - which allows you to change
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With the Commodore disk drive it is
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Nearly all code will need data tabl
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A swhich enables you to store any s
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Playing all sounds in memory Doing
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3,0375 10600ATA 4C,A1,15,AD,A7,10,C
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SPECIAL OFFER — FREE MODEM WITH Y
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memory you have left. MEM will disp
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C64 REVIEWS The Newsralcom Desi91 -
Page 37 and 38: 'po , • p • ; . • • • •
Page 39 and 40: Checksum Program The hexadecimal nu
Page 41 and 42: 1 Should you not have any of the ab
Page 43 and 44: Vtt C4* 4eW computer show k9 * t Ch
Page 45 and 46: Maintenance, Service. Support. Trai
Page 47 and 48: O E c o m m o d olii r e At last th
Page 49 and 50: ROJAN THE ULTIMATE IN GRAPHICS TOOL
Page 51 and 52: RAD 28 95 AMSTRAD POW DISK 1945 ATA
Page 53 and 54: W can a be like a stroll through a
Page 55 and 56: 1 Games Reviews COLLAPSE REVIEWS Th
Page 57 and 58: HOODOO VOODOO REVIEWS its detectors
Page 59 and 60: SPEED KING The smell of petrol, the
Page 61 and 62: of enemy lighters, its only after p
Page 63 and 64: THE FINAL CARTRIDGEI I MO IMO oroYo
Page 65 and 66: HARDWARE REVIEWS Pick of the Sticks
Page 67 and 68: Y look o out for new programs, hint
Page 69 and 70: ENT trfull arrie arp ikon the la y
Page 71 and 72: MICROCOMPUTER HARDWARE SUPPLIES COM
Page 73 and 74: PROGRAM: AUTOS AVE Please read 'LIS
Page 75 and 76: EPILOG-I CARTRIDGE SYSTEM COMMODORE
Page 77 and 78: DATA VALUES will be saved on each l
Page 79 and 80: C64 AND C128 ill D3 Al ,56,53,48,20
Page 81 and 82: U page n at the sight of an acronym
Page 83 and 84: LEAPER ••• •1 0 - 1 Amazing
Page 85 and 86: I n data can be input into your cod
Page 87: LISTING 6 MACHINE CODE 10 $0073 CHA
Page 91 and 92: program allows you to set up the co
Page 93 and 94: Going from left to right across the
Page 95 and 96: Lineage: 45p per word. (52p incl. V
Page 97 and 98: SOFTWARE LIBRARY MIDLAND COMPUTER L
Page 100: k_ *8 digitally recorded drum sound
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