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From The Editors Of COMPUTE! Magazine
COMPUTErs FIRST BOOK OF
ATARI"
Published by COMPUTE! Books,
A Division of Small System Services, Inc.,
Greensboro, North Carolina
A
Small System
Services, Inc.
j Publication
AlARI is a registered tr ademark of Alarl. Inc
GRAPHICS
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Copyright © 1982, Small Syste m Serv ices, In c. A ll ri g hts reserved"
Re production or translatio n o f any part of thi s wo rk beyond that p e rmitted by Sections
107 and 108 of the Unite d S ta tes Copy ri g ht Ac t w ith o ut th e permission of th e co py ri g ht
owner is unlawful.
"Using Strings For Grap hi cs Storage" a nd " Copy Yo ur Sc reen To You r Printe r" we re
orig inally publis h e d in COMPUTE! Magaz in e, Ma y 1981, cop y ri g ht 1981, Small Sys te m
Se rvices, Inc. "Using The COLOR And LOC ATE In s tru ctions To Prog ram Pong-Type
Games" and "Pos iti o ning PI M A nd Regular G raphics In Me m ory" we re orig in a lfy pub-
li s h ed in COMPUTE! Maga z in e , Septe mbe r 198 1, co p y ri g ht "1981, S mall Sys te m Serv ices,
In c. "Discove rin g 'Hidde n ' G raphi cs" a nd " Ad ding High-S peed Ve rti ca l Pos iti on in g To
PI M Graphics" w e re orig in a ll y publi s h e d in COMPUTE! Ma gazin e, Dece mber "19 81,
copyright 1981, Small Sys te m Serv ices, Inc. "Put Graphics Mo d es 1 And 2 At The Botto m
O t Your Screen " a nd "P/M G ra phics Made Easy" were o ri g in a ll y publis h ed in
COMPUTE! Magazin e, Fe bruary 1982 , co p y ri g ht 1982, S mall System Se rvi ces, In c. " Print-
in g Characte rs In Mi xed Gra phics Modes" was o ri g inally publi s h e d in COMPUTE!
Magazine, Apri l 1981, copy ri g ht 1981, Sma ll System Se rvices, In c. "Add A Tex t Window
To Grap hi cs 0," "A Self- Modify in g PI M G rap hi cs Utility," a nd "GRA PHI CS 8 1n Four
Colors Us ing Artifac ts" w e re orig inall y publi s h e d in COMPUTE! Ma gazin e, June 1982,
copyright "1982, S m a ll Syste m Se rv ices, Inc. "Mixing G ra phi cs Mo d es 0 ar.d 8" was o ri g i-
nall y publis h e d in COMPUTE! Ma gazin e, Jun e 1981, copy ri g h t 1981, S mall System Se r-
vices, Inc. "Ch aracter G e n e ration" was o ri g in a ll y publ is h ed in COMPUTE! Ma gazin e,
Fe bruary 1981, copy ri g ht 1981, S m a ll System Se rv ices, In c. "Designing Your Ow n C h ar-
acte r Sets" was o ri g inally publis h e d in COMPUTE! Magazin e, Ma rch 198 "1, cop y ri g ht
1981, Small System Ser vices, In c. "S upe rF o nt" wa s o ri g ina ll y publis h ed in COMPUTE!
Magazine, January 1982, co pyrig ht "198 ], S ma ll Sys te m Se rv ices, In c. " Tex tPlot" was
originall y publis h e d in COMPUTE! Ma gazin e, Novembe r 198 1, copyright ]981, S mall
Sys te m Services, In c. "Us in g Tex tPl o t For Animated Games" was o ri g in all y publis h e d in
COMPUTE! Magazin e, A pril 1982, co py ri g ht 1982, S ma ll Sys tem Serv ices, In c. "Anim a -
tion And PIM Grap hi cs" a nd "Ata ri Vid e o G ra phics And The New GTIA, Pa rt II" we re
orig inally pu bli s h e d in COMPUTE! Ma gazin e, Augus t 1982, co py ri g h t "1982, S ma ll Sys te m
Se rv ices, In c. " Exte nding Pla yer/ Mi ssil e G ra phics" a nd " Bewa re T h e RAMTO P Drago n"
we re origina ll y publis h ed in COMPUTE! Ma ga z in e, Octobe r 198 "1, co p y ri g ht "1981, S ma ll
System Se rvi ces, In c. "Extra Colo rs Throu g h Artifa ctin g" was origimlll y published in
COMPUTE! Maga z ine, May ]982, co py rig ht "1982, Small Syste m Serv ices, In c. "Atari
Video Graphi cs A nd The New GTIA, Part I" was o ri g ina ll y publis h e d in COMPUTE!
Magazine, July 1982, copyrig ht 1982, S m a ll Syste m Se rvices, In c. "A ta ri Video G raph ics
And The New GTIA, Part III " was o ri g in a ll y publi s h ed in COMPUTE! Magazine, Sep te m-
ber 1982, co p y ri g ht 1982, Sm a ll System Se rvices, In c. "Me m o ry Protection" w as orig i-
n a ll y publis h e d in COMPUTE! Magazine, Jul y 198"1, co p y ri g ht 1981, S mall Sys te m Ser-
vices, In c. "Screen Save Ro utine" was o ri g in a ll y publi s h ed in COMPUTE! Ma ga z in e,
March 1982, copyright 1982, Sma ll Sys te m Se rv ices, Inc.
Printed in the Unitf d States of A m e ri ca
ISBN 0-942386-08-6
10 9 8 7 6 5 4 3 2
ii
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v. Introdu ct ion
Robe rt C. Lock
1 Chapter One: Fundamentals Of Atari Graphics
3 Th e Basic s Of A tari G ra phics
16 Us in g S trings Fo r G rap hi cs Storage
Tom R. Ha lfhill
Mi c hae l Boom
20 Us in g The COLO R A n d LOCAT E instru c ti o n s
To Prog ra m Pong -Ty p e Ga m es
M ichae l A . Green s pan
23 Chapter Two: Customizing The Graphics Modes
25 How To Des ig n C u s to m G ra phics Mod es
37 Put G ra phics Mo d es I A nd:?
A t The Bo tto m O f Yo ur Sc reen
41 P rin tin g C h a racte rs In M ixe d G ra phics Mod es
44 Add A Tex t Wind ow To GRA PI'-ll CS 0
46 M ixin g G ra ph ics Mod es 0 A n d 8
C ra ig C hambe rla in
R. Alan Be lke
. C raig Patchett
C h a rl e s Bra nnon
Dou g la s C ro ckford
n C haracte r Set Ul ili ti es
89 Chapter Four: Amination With Character Graphics
91 Tex tPlllt
98 Us in g Tex tPlo t ro r A nima ted Ga m es
108 .. High-S p eed A nima ti o n W ith C h a ra cte r G ra phics
C ra ig P a tch e tt
C h a rl es Bra n n on
Fred Pinho
C h a rl e s Bra n non
David Plotkin
Cha rl es Bra nnon
127
129
140
154
Chapter Five: Animation With Player/Missile Graphics
Introdu ction To Pl aye rl Missil e G ra phics
A Se lf-Mod ify in g PIM G rilphi cs Util il y
Adding Hi g h -S p eed Vertica l Positi o n in g
To PIM G ril phics
P/M G ra phics Ma d e EelSY
A nima ti o n A nd PIM G ra phics
Ex te nding P lilye rlM issil e G ra phics
The C o lli s ion Regis te rs
The Pri o rity Regis te rs
Bill Wi lkin son
Ke nne th Grace , Jr.
Da v id H . Markley
Tom Sak a n d Sid Me ier
T o m Sak and Sid Me ier
Eri c Stoltman
Matt Ciwe r
Bill Wi lkin son
164
172
184
188
192
201 Chapter Six: Advanced Graphics Techniques
203 G RAPHI CS 8 In Fo ur Colo rs Us in g A rtifa cts
208 A ta r i Vid eo G r<lp hi cs A nd T h E' New GTI A, Pa rt]
215 A tari Vid e o G rdphics A nd Th e New GT IA, Pa rt:?
224 A ta ri Vid E'O G ra phics A nd T h e New GTI A, F' cll" t 3
236 Pro tec lin g Me m o l·\, Fo r P/M A nd C h dr<lc te r Sets
239 Sc ree n Save Routin e
Dav id D ia m o nd
C ra ig C h ambe rlain
C ra ig C h ambe rla in
C rai g C hambe rl ain
F red F' inh o
Jo seph T re m
245 Li s tin g CO ll\ e n li o n s (C uid e To Typi n g In Progra m s)
246 Index
III
51 Chapter Three: Redefining Character Sets
53 Desig n in g Yo ur Ow n C h a racle r Sets
62 S upe r Fo nt
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