Computes First Book of Atari Graphics.pdf

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

Small System

Services, Inc.

j Publication

AlARI is a registered tr ademark of Alarl. Inc

GRAPHICS

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,

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,

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,

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

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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