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modul ~ / pro g ra m. E x t e rn a l s m ay o n l y b e d e c l a r e d a t t h e g l o b a l(o u t er mo s t ) l e v e l o0 a p r o g ra m o r m od u l e .Jus t as i n v a r i a b l e d e c l a r a t i o ns i t h e * T ARI P as c a l ' l a n g uage r e q u i r e s()ou -t o. make s ur e -t h'e numba r -an d t y pe o0 p ar amet e r s., m atc h e x ac t l y a n dth e r e t ur ne d t y p e ma t c he s e xa c t l y fo r f u n c t i o n s i b e c a u se t h e c omp il e ran d l i n ke r d o n o t ha v e t h'» a b i l i t y t o t ((p e c h ec k ac r o ss m odu l e s .Ext er na l r o u t i n e s ma y NOT hav e pr o c edur e s an d f u n c t i on s as p a r a m ete r s .Not e t ha t i n ATARI Pa s ca l e x t er na l na me s a r e s i g n i f i c a n t o n l y t o s e v enc ha r a c t er s an d n o t e i g h t . Whe n i n t e r f a c i n g t o a s semb l y - l a ngua ge s l i m i tt he l en gt h o0 i den t i f i er s access i b l e b g assembl y l anguage t o si xc ha r a c t e r s .Li s t e d b e l o w a r e a ma i n p ro g r a m s k ~ l eto n a nd a m odul e s k e l e t o n. T hemai n pr o g r am r e f e r enc es . va r i a b l e s a n d s ub pr o g r ams i n t h e mo d u l e. . andth e mod u l e r e f e r en ce s v a r i a b l e s an d s ub pr o grams i n t h e ma i n p r o gr am.Th e on l y di d ' f e r en ce s b e t ween a ma i n p ro g r a m a nd a m od u l e a r » t h at a tth e b e g i n n i n g oW a ma i n p r o g ra m t h er ~ ar e 1 6 b y t e s o f . header c o d ean d a m ai n p r o g ra m b o d() f o l l o wi n g t h » p r o c e du re s a n d 0 u n c t i o n s .M ai n Pr o g r am Kxamp l e :PROGRAM KXTKRNAL DEMO'VARIi 4 : I NTEQER~ ( + AVAI LABLE I N OTHER MODVLES + )K . L : KXTERNAL I NTEQERi ( + LOCATED ELSEWHERE + )K XTKRNAL PROCEDURE SORT (VAR 8: L I ST ) LEN: I NTKQER) 'EXTKRNAL FUNCTI ONI QTEST: I NTEGER)P ROCEDURE PROC I >BEGINIF I OTKST I THEN( » CALL AN EXTERNAL FVNC NORMALLY + )END>BEGI NS ORT ( . . . . ) (( + CAL L A N E XTERNAL PROC NORMALL Y + )END.MODULE MODUS E DEMOlM odul e E xamp l e : (Not e t h es e a r e s epar a t e W i l e s )
l a b e l s c on s t ~ t y p e d e c l a r a t i on s >I ~ J : E XTERNAL I NTKCER i ( » USE THOSE FROM t1AI N PROORAN » )Kr L: I N TKQKRJ ( » DEFI NE THESK HERE » 3EXTERNAL PROCEDURE PROC1) ( » USK THK ONE FROM THK HA I N PROC » )P ROCEDURE SORT ( . . . ) ) ( » DEFI NE SORT HKRK + )FUNCTION I OTEST: I NTEGERS ( » DEFI NE I OTKST HERE » )< maybe o t he r p r oc ed ur e i a n d f un c t i on s h er e>NODEND.
Page 1 and 2: W ATARI' PROGRAM EXCHANGEATARI PASC
Page 3 and 4: Distributed ByThe ATARI Program Exc
Page 5: NCN-KKCMSXVE p MYALTY-FREE- LICENSE
Page 8 and 9: TABL E O F CONTENTSC H*PTER 1 :ATAR
Page 10 and 11: 3 7 5 1 2 T r i g g e r F u n c t i
Page 12 and 13: APPENDI X A :APPENDI X B :APPENDI X
Page 14 and 15: C HAP TER 1 :A TAR I PASCAL I NTROD
Page 16 and 17: I. 2 S y s t e m O ve r v i e wThe
Page 18 and 19: D i s k e t t e 2P a s c a 1 Comp i
Page 20 and 21: 2 . 1 Comp i l e L i n k an d Ru n
Page 22 and 23: T h e s y s t e m w i l 1 p r o mp
Page 24 and 25: 2 . 1. 3 R u n Sa mp l e P r o g r
Page 26 and 27: 2 . 2 . 2 Co mp i l a t i o n Da t
Page 28 and 29: g e n er a t e d w i t h e r r a r
Page 30 and 31: 2 . 2 . 4 B u i l t - i n R o u t i
Page 32 and 33: 2 . 3 L i n k e r Op e r a t i o n2
Page 34 and 35: C h e c o mp u t e r c o n s o l e
Page 36 and 37: 2. 4 Ob g ec t P ro g ra m E x ec u
Page 38 and 39: CHAPTER 3 :A T * R I PASCAL L ANQVA
Page 42 and 43: 3 . 2 D a t a A l l o c a t i o n a
Page 44 and 45: 3 . 2. 2 Pa r amet e r Pa s s i n g
Page 46 and 47: Example:PRQQRAN PROC2'TYPECQNNARKA
Page 48 and 49: 3. 4 . I NOVE i MOVER I QHT i NOVEL
Page 50 and 51: 3 . 4. 2 K X I TP ROCEDURE EXI T >E
Page 52 and 53: 3. 4 . 4 S HR i SHLFUNCTION SHR (BA
Page 54 and 55: 3. 4. h ADDRFUNCTI ON ADDR(VARI ABL
Page 56 and 57: 3. 4, 8 F I LLCHARPRQCKDVRK F I LLC
Page 58 and 59: 3. 4 . 10 CONCATFUNCT ION CONC AT (
Page 60 and 61: 3. 4. f.R P OSFUNCTI ON POS ( PATTE
Page 62 and 63: 3. 4 . 14 I NSERTPROCEDURE I NSERT
Page 64 and 65: 3. 4. 16 W N B~ G N SF UNC't IQN 'O
Page 66 and 67: 3. 4 . i 8 QPKNPROCEDURE QPKN ( F I
Page 68 and 69: 3. 4. 2() PURGEPROCEDURE PURGE ( F
Page 70 and 71: 3.. 4. 22 . M KH* V* I L i MAXAVA I
Page 72 and 73: 3 . 5 N o n - S t a n d a r d Da t
Page 74 and 75: T h e pr o g r a m f r agmen t b e
Page 76 and 77: T he f o l l owi n g s e c t i on s
Page 78 and 79: 3 . 7. 3. 5 C o l o r Pr o c ed u r
Page 80 and 81: 3 . 7. 5. I . 1 Pa d d l e F un c t
Page 82 and 83: m axi mum v a l u e b e i n g r e t
Page 84 and 85: 5. l. 3 I N TEGERT h e da t a Cgp e
Page 86 and 87: Th e i n d i v i d ua l c hav'a c t
Page 88 and 89: 5 . 1. 7. 4 Re a d i n g a n d Wr i
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6 , 1 I n compa t a b i l i t i e s
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12. UCSD Pasca l daes na t f u 11g
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7 S ummav'y a f t h e AT* R I Pa s
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7 . 3 N o t a t i o n s T e r m i n
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7 . S Co n s t a n t De f i n i t i
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'" s t r u c t u r e d t y p e> «u
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7 . h. 2. 4 F i l e T y p e s' ".f
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* t a n y p l a c e wh er e t h e r
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7 . 8 E x p r e s s i on s< un s i
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7 . 9 S t a t emen t s: s t a t eme
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s e l e c t o r s . t h e p r o g r
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v a r i a b l e d e c l a r a t i o
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7 . 10 . 1. 2 D y na mi c A l l o c
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D I SPLAY I T ( A2 )(+ CAL L DISPEL
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4 3 S ( X ) Q R A BS«'f i x ed
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! ( s y n o n y m l ) i s a n O R o
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i d e n t i f i e r > 4 . i d e n t
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APPENDI X 8 :RESERVED WORDSTh e f a
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1 7 : ' BEGI N ' e xpe c t e dS e 1
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119 : R e - s p e c i f i e d p a r
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1 5 4 : A c t u a l p a r a m e t e
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4 0 4 : E r r o r i n w r i t i n g
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1. DEF I N I T I ONBT h e t e r m s
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2. F UNDA)" EN T* L F I L E OP ER*
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P ROCEDURE A S S I GN ( VA R F : F
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g t h e Op e r a t i n g S y s t e
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3 . T E XT F I L E SDEF IN I T I QN
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F o r m a t t e d O u t p u tIn F i
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PROCEDURE READ'PROCEDURE READL N;P
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MI SCEL L ANEOUS F I L E ROUT I NE
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A PPEND I X F : P l a y e r / M i s
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E XTERNAL PROCEDURE 8 I GBANG> ( «
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END E L B E I F A = 7 T HEN MOVER I
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P IOVENI S S I L E i ( + ST ART t"
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M ODULE PE EKPOKE '(+Thi s modul e
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INDE XA BSOL UT E v a t i a b l e s
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D a t a s t o r a g eD a t a t y p
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I n c l u d e f i l es 5s 8 t 1 4 '
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DEMUCUN ( c on f or ma n t a r r a
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U s e rt a b l e s p a c eW i nd o
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ATARIPROGRAMW EXCHANGEP.O. Box 3705
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