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Figure 4-3. The EditorCommandEditorJJumpBeginningEndr---.,Same IL ___ _JMarker11-94 Chapter 4: The Editor
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Apple Apple II Pascal 1.3•,_
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Apple II Pascal 1.3
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your system. To be sure that your s
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How to Read This ManualHardware Not
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Part IGetting Started
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System Notes 18Using a 40-Column Vi
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PrefacePart I describes the steps y
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To provide a focus for discussion i
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Enhanced lieIf you have an enhanced
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If you are not going to use your Pr
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Using a Pascal-Formatted ProFileYou
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Other llc'sIf you have an Apple Ile
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How Pascal Assigns Volume NumbersA
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Using System PromptsAs soon as you
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Make Backups of Your System DisksWe
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A Warning.&.Warning6. Note that bot
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The 128K and 64K Pascal Systems Com
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o The TAB key is absent, which mean
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If you have an Apple II or II Plus
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Once you transfer the system files,
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If you are using an SO-column displ
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II Plus users have made the require
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APPLE3:SYSTEM.APPLEFORMATTER.CODEFO
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ContentsFigures and TablesxviiPREFA
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Moving Files 41Transfer 41Copying a
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The Editor Commands 93Insert 96Text
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CHAPTER5The CompilerIntroduction 13
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Local Labels 178Constants 179Locati
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CHAPTER 7The LinkerIntroduction 208
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APPENDIX2ACommand SummariesAll Leve
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APPENDIX2FDemonstration ProgramsInt
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PrefaceProgram Preparation Tools is
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Chapter 1An OverviewII-1
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Pascal FilesA file is defined as a
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There are two parts to a workfile:
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o On the 128K Pascal system, the sp
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The Command LevelYou reach the Comm
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Figure 2-1. The Command LevelComman
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CompileTyping c while at the Comman
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InitializeTyping 1 from the Command
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Commands Usable at All LevelsCertai
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Chapter 3The FilerII-21
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Bad-blocksExamineTests a disk to se
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B I~ XBad-blocks ExamineThe Filer s
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To erase your response to a Filer p
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Standard Volume Names and NumbersTa
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emoved from the filename. You shoul
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filename that may not be ignored. T
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You may use only one wildcard in a
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A system with two 5~-inch disk driv
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You can list any portion of a direc
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APPLEr.l:SYSTEM.PASCALSYSTEM.MI SC
Page 115 and 116: When you press RETURN, the system c
Page 117 and 118: You can use wildcards with the Tran
Page 119 and 120: The display clears, and then the fo
Page 121 and 122: One Disk DriveOm:H:>rive NoteTo cop
Page 123 and 124: Prompt: Remove what file ?Response:
Page 125 and 126: as replacement strings) given in th
Page 127 and 128: You do not need to put a volume on
Page 129 and 130: ZeroThe Zero command "erases" a spe
Page 131 and 132: QuitThe Quit command, which is invo
Page 133 and 134: Observing filename conventions, you
Page 135 and 136: One-Drive MethodOn one-drive system
Page 137 and 138: If there is already a workfile SYST
Page 139 and 140: If you see that one of your disks c
Page 141 and 142: An N response to this prompt return
Page 143: -Filename ConventionsVolume name wi
Page 146 and 147: IntroductionThe Pascal Editor helps
Page 148 and 149: 4. If you are editing a program, yo
Page 150 and 151: Editing With a 31/2-lnch Disk Drive
Page 152 and 153: As you have already learned if you
Page 154 and 155: Starting a New FileIf a workfile is
Page 156 and 157: For example, if the cursor is on th
Page 158 and 159: Apple II or II PlusIt is legal to i
Page 160 and 161: To leave the Editor, press G for Qu
Page 162 and 163: Notice that not all commands affect
Page 164 and 165: Cursor MovesYou can use repeat-fact
Page 168 and 169: Insert-The Insert command allows yo
Page 170 and 171: and Filling to True. For example, t
Page 172 and 173: .A Warning The automatic remarginin
Page 174 and 175: The Editor remembers where the curs
Page 176 and 177: This leaves you with something like
Page 178 and 179: To c0py the text, typeMYDISK:SUPERM
Page 180 and 181: ExchangeYou use the Exchange comman
Page 182 and 183: After you press the SPACE bar, the
Page 184 and 185: ExampleSuppose you have Token searc
Page 186 and 187: DirectionThe Replace command operat
Page 188 and 189: Same-String OptionIf you type s in
Page 190 and 191: Jump-The Jump command moves the cur
Page 192 and 193: After you have typed CONTROL-C to a
Page 194 and 195: Set EnvironmentThe Editor lets you
Page 196 and 197: 40=Column !DisplaysFilling should g
Page 198 and 199: the right place in the string) and
Page 200 and 201: When you operate a skateboard in ex
Page 202 and 203: Quit-You use the Quit command to ex
Page 204 and 205: WriteThe Write command saves the fi
Page 206 and 207: Special Commands SummaryYou will fi
Page 209 and 210: Chapter 5The CompilerIl-137
Page 211 and 212: Two 51/.oi·lnch Disk DrivesOne 51/
Page 213 and 214: If there is no text workfile, you w
Page 215 and 216: The period at the end prevents the
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o Pressing the SPACE bar instructs
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Execution Error MessagesThe informa
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Default option: {$1-}{$1 filename}
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The "Range Check" OptionThis option
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The { $N +} option should be placed
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The "User Program" OptionThis optio
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IntroductionEven if you write most
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If you attempt to assemble without
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After the source and object files f
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This is similar to the choice that
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First, use the Filer's New command
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The Assembly ListingAfter you have
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01HlllllCurrent memory available:0
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ADRSPUSHPAGE -AB l!HHJ 41 ALOOPMC -
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If you have a printer connected to
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The statements making up the body o
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local LabelsA local label has a dol
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An at sign(@) before an expression
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PAGE - 1 TEMP1 FILE:lllllll01Curren
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ConventionsWhen you write assembly-
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parameter names are given. For exam
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Example:TEMP .BYTE 4The associated
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.ABSOLUTEThis directive forces the
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Example:.MACRO HELPSTA %1LDA %2.END
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LDAill formed operandECdit,,[ SPACE
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name in both the program and the ro
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The use of the .DEF and .REF direct
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.LIST and .NOLISTThese two directiv
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File Directive.INCLUDECauses the sp
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Data Directives[label].ASCII""Inser
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Chapter 7The LinkerIl-207
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Linking Using the link CommandYou i
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If you press RETURN in response to
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linking Using the Run CommandIf the
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Chapter 8The LibrarianII-215
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Librarian, that are invoked by the
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The Input FilesThe Librarian now di
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lJ Slot to copy into?2 Slot to copy
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Copyright Notice Lost: The Libraria
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If the file you specify is not a co
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enter library name: #S:samplelist l
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Chapter 9Utility Programs11-229
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Two 51/4-lnch DrivesOne 51/4-lnch D
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Using an Ex:temal TerminalThe Apple
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Vertical Move DelayValue: The numbe
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Key to Delete LinePressing Line Del
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Parameter Field NameERASE TO END OF
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Reconfiguring the SystemTo use an e
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Changing GOTOXY CommunicationThe GO
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The screen will showAPPLE GOTOXY BI
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Using the Linefeed UtilityFrom the
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If you respond by typing v for Yes,
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This appendix contains summaries of
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LinkSwapExecuteRunUser restartIniti
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Volume CommandsVolumesList-director
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Editor Command SummarySpecial Comma
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ExchangeReplaceReplaces the charact
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Appendix 2BSystem FilesII-263
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CommandLinkExecuteRunFiles Needed65
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Filename Contents of File Use of Fi
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APPLE3:lPASCAL:SYSTEM.APPLE 32 Cont
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A Complex Sample ProgramThis append
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Figure 2C-l. Creating a Complex Pro
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The Regular UnitUse the Editor to c
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PROCEDURE INTRINUPROC;BEGINWRITELNC
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;As you will see,. CONST LENGTH.PUB
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cPutting the Pieces TogetherThis se
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LLink what host codefile? MAINOpeni
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Appendix 2DMaking a Turnkey DiskII-
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Appendix 2EMaking and Using Exec Fi
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Terminator Characters: The terminat
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.& Warningis actually sent to the p
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Appendix2FDemonstration Programs11-
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What follows is a description of ho
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Assuming that the ROT ATE procedure
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The outer REPEAT first calls MAKETR
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position in the CORNER variable for
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If you wish to modify, compile, and
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1. Starting at the root node, FLIPP
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Program CROSSREF contains examples
Page 383 and 384:
On completion of the design, the pr
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If you type N for No, you will agai
Page 387 and 388:
Appendix 2GPascal 1/0 Device Volume
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Appendix 2HError Messages11-317
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ErrorNumberError Message10 I/O erro
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ErrorNumberError Message9 Identifie
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Compiler Error MessagesWhen the Pas
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ErrorNumberError Message123 Missing
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ErrorNumberError Message202 String
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Part IIILanguage Manual
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Block Syntax 13Declarations 14Const
Page 407 and 408:
CHAPTER5Dynamic VariablesUsing Dyna
Page 409 and 410:
CHAPTER7Program ControlsRepetition
Page 411 and 412:
Character File I/O Operations 173IN
Page 413 and 414:
Library Name Files 231Making a Libr
Page 415 and 416:
Program Chaining 275The SETCHAIN Pr
Page 417 and 418:
Procedure Call 305File Type 305REWR
Page 419 and 420:
The RESET Macro 335The SWITCH Macro
Page 421 and 422:
CHAPTER5Dynamic VariablesPointer Ty
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Value Specifier Syntax 17 4READ Pro
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CONCAT Function 300FOR Statement 30
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PrefaceThis part of the Apple II Pa
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Supporting these chapters are sever
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Apple II Pascal 1.3 is a version of
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Pascal Versus BASICIf you are a BAS
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Chapter 2Program StructureIll-7
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The program block contains a single
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o Identifiers are the names of such
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Pascal SyntaxPascal has its own syn
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string or an array or some other ty
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A More Complex ExampleHere is anoth
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esult is called a compound statemen
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Here are the rules for composing yo
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CommentsGood programming practice i
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Chapter 3Simple Data TypesIll-25
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New data types are created by the t
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String and CHAR constants may not c
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The INTEGER TypeIntegers are whole
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A Technical Note: Pascal often sets
Page 465 and 466:
This declaration creates the new da
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Chapter4Structured Data TypesIIl-37
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declare a longer maximum. In both c
Page 471 and 472:
Here are some examples:TYPE ALPHANU
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The ARRAY TypeA Pascal array is an
Page 475 and 476:
We could now make the following arr
Page 477 and 478:
You can manipulate the elements of
Page 479 and 480:
o Each corresponding dimension must
Page 481 and 482:
The syntax for writing the field li
Page 483 and 484:
Information A bout the Example: Thi
Page 485 and 486:
o The limits on the number and type
Page 487 and 488:
These are the rules by which Pascal
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ecord variable of CHECKBOOK as CHEC
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Chapter 5Dynamic Variableslll-61
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Here is an example of this process
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o The base type may be an identifie
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o Don't try to change the variant,
Page 499 and 500:
MARK and RELEASE are used in pairs.
Page 501 and 502:
Chapter 6Operations on DataIII-71
Page 503 and 504:
By combining these elements, you ca
Page 505 and 506:
Each kind of factor has its own syn
Page 507 and 508:
AssignmentsThe assignment statement
Page 509 and 510:
Arithmetic OperationsApple Pascal p
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single-character operators, DIV mus
Page 513 and 514:
ABS CROUND CX/Y))ABS C2-X>The ABS f
Page 515 and 516:
Random Number Fum::tionsApple Pasca
Page 517 and 518:
FUN CT ION RAND2 : INTEGER;VAR MAX,
Page 519 and 520:
o Two records of congruent type may
Page 521 and 522:
Be Careful: CHR does not check to s
Page 523 and 524:
The SCAN FunctionThis function scan
Page 525 and 526:
Your use of MOVELEFT or MOVERIGHT m
Page 527 and 528:
The CONCAT FunctionCONCAT accepts a
Page 529 and 530:
VARS : STRIHGC1l;o With COPY, INSER
Page 531 and 532:
Bit Interpretation of Scalar TypesE
Page 533 and 534:
.' Bit Logic ExamplesHere are some
Page 535 and 536:
This is because Pascal tries to int
Page 537 and 538:
Chapter 7Program ControlsIII-107
Page 539 and 540:
Repetition StatementsPascal provide
Page 541 and 542:
Observe these rules and cautions wh
Page 543 and 544:
Here is an example of a REPEAT stat
Page 545 and 546:
Here are are two examples of IF sta
Page 547 and 548:
The above statement can be clarifie
Page 549 and 550:
It accomplishes the same job as the
Page 551 and 552:
Here is an example of a GOTO statem
Page 553:
The EXIT procedure is seldom essent
Page 556 and 557:
Procedures and functions are the su
Page 558 and 559:
In both cases, the parameter list i
Page 560 and 561:
Special Note About Long Integers: T
Page 562 and 563:
PROCEDURE ALPHA CHI, LO REAL; FACTO
Page 564 and 565:
Here are the rules governing the re
Page 566 and 567:
o The real variable METAL declared
Page 568 and 569:
After you have written its heading
Page 571 and 572:
Chapter 9Assembly-Language Routines
Page 573 and 574:
EXTERNAL Procedures and FunctionsPR
Page 575 and 576:
The evaluation stack may have alrea
Page 577 and 578:
To summarize, the structure of the
Page 579 and 580:
If your routine has accomplished ai
Page 581 and 582:
An ExampleThe following sample, del
Page 583:
sample procedure for Pascal, declar
Page 586 and 587:
Apple Pascal provides a variety of
Page 588 and 589:
File VariablesUnlike most other var
Page 590 and 591:
External FilesThere are three categ
Page 592 and 593:
Pascal types volume numbers, volume
Page 594 and 595:
although it permits inputs as well.
Page 596 and 597:
Be Careful: Using RESET with a file
Page 598 and 599:
o If a file has any records in it,
Page 600 and 601:
In particular, disk drives usually
Page 602 and 603:
Here is a sample use of SEEK:SEEK C
Page 604 and 605:
until a character was typed. With t
Page 606 and 607:
Certain specific rules apply to the
Page 608 and 609:
o READ with a CHAR variable reads o
Page 610 and 611:
o Except when READLN is used with a
Page 612 and 613:
BLOCKREAD transfers data from an ex
Page 614 and 615:
Both procedures are written with th
Page 616 and 617:
Type "B" character checking: CONTRO
Page 618 and 619:
When UNITSTATUS is called, it may a
Page 620 and 621:
o SHIFT is TRUE if the oldest chara
Page 622 and 623:
WHILE NOT keypress DD { reiterate u
Page 625 and 626:
Chapter 11Screen GraphicsIII-195
Page 627 and 628:
o DRA WBLOCK is a complex and power
Page 629 and 630:
o If the graphic image has never be
Page 631 and 632:
PENCOLOR and FILLSCREENTo set the c
Page 633 and 634:
TURTLEX, TURTLEY, TURTLEANG, and SC
Page 635 and 636:
ModeAction0 Fills area of screen wi
Page 637 and 638:
If CHARTYPE is not called, the defa
Page 639 and 640:
Chapter 12Program Units111-209
Page 641 and 642:
You can list any number of units af
Page 643 and 644:
The process of compiling an Intrins
Page 645 and 646:
64K Note: When compiling Program Un
Page 647 and 648:
consists of the word INTERFACE foll
Page 649 and 650:
preceded by the procedure or functi
Page 651 and 652:
IMPLEMENTATION{A private procedure
Page 653 and 654:
Changing Units and Host ProgramsOne
Page 655 and 656:
Chapter 13LibrariesIII-225
Page 657 and 658:
o You can create a Program Library
Page 659 and 660:
SYSTEM.LIBRARYSYSTEM.LIBRARY is the
Page 661 and 662:
library Name FilesA Library Name Fi
Page 663 and 664:
Using One library File With Two Pro
Page 665 and 666:
Using Seve1ral Library Files With S
Page 667 and 668:
program. It directs the Compiler to
Page 669 and 670:
Chapter 14Compiler OptionsIII-239
Page 671 and 672:
Finally, you can insert a space cha
Page 673 and 674:
Chapter 15Large Program ManagementI
Page 675 and 676:
The Compiler might fail to process
Page 677 and 678:
o Use MARK and RELEASE to optimize
Page 679 and 680:
When an Intrinsic Unit is compiled,
Page 681 and 682:
Remember: If your program has any s
Page 683 and 684:
Loading of SEGMENT Procedures and F
Page 685 and 686:
PROGRAM THREE;USES BIGUHIT;SEGMEHT
Page 687:
swapping is obviously undesirable,
Page 690 and 691:
This chapter rounds out the Apple P
Page 692 and 693:
o You can write assembly-language E
Page 694 and 695:
Here is the source text for the 650
Page 696 and 697:
Program Unit Required! The Program
Page 698 and 699:
VAR UpKey : CHAR;DownKey : CHAR;PRO
Page 700 and 701:
Setting the High Character BitOn Ap
Page 702 and 703:
The CR character is used in files o
Page 704 and 705:
After READ with a CHAR variable and
Page 706 and 707:
Program chaining is accomplished by
Page 708 and 709:
SWAPON, SWAPGPON, and SWAPOFF¥¥¥
Page 710 and 711:
Using SETCV AL and GETCV AL, you ca
Page 712 and 713:
Here is a typical process for creat
Page 714 and 715:
The following sample procedure assu
Page 716 and 717:
VARLoop,WordsinArray,BytesCalcBuffe
Page 718 and 719:
FUNCTION BRANCH CH : INTEGER> PTR;V
Page 720 and 721:
Identifierletterletterdigitundersco
Page 722 and 723:
String TypeSTRING-~-----------.....
Page 724 and 725:
Record Type Variant Parttagidentifi
Page 726 and 727:
Expressionsimpleexpression___ __, .
Page 728 and 729:
Factorunsignedconstantvariablerefer
Page 730 and 731:
Variable Referencevariableidentifie
Page 732 and 733:
IF Statementexpresssion statement s
Page 734 and 735:
Function Definitionnewidentifier1--
Page 736 and 737:
RESET Procedurefileidentifierstring
Page 738 and 739:
READ ProcedurefileidentifierREADLN
Page 740 and 741:
Program Unit CompilationProgram Uni
Page 742 and 743:
Implementation SectionIMPLEMENTATIO
Page 744 and 745:
This appendix contains further deta
Page 746 and 747:
Underflow,.The underflow exception
Page 748 and 749:
This section describes how real val
Page 751 and 752:
Appendix 3CMemory Allocations for D
Page 753 and 754:
ecord tag fields given an identifie
Page 755 and 756:
Note that the array declarationsPAC
Page 757 and 758:
Pascal stores ordinary (not packed)
Page 759 and 760:
Appendix 3DUseful Assembly-Language
Page 761 and 762:
The RMVBIAS MacroThis macro removes
Page 763 and 764:
.ELSE. IFSTX.ELSE. IFSTY.EHDC. ENDC
Page 765 and 766:
yte = The address of the byte whose
Page 767 and 768:
count = The number of bytes to move
Page 769 and 770:
The NOTBITBR MacroThis macro is the
Page 771 and 772:
Appendix 3ESummary of 6502 OpcodesI
Page 773 and 774:
6502 Microprocessor InstructionsADC
Page 775 and 776:
Instruction CodesAmmblyNa ma Operal
Page 777 and 778:
Auembly HEXNa ma Operation Addr..,l
Page 779 and 780:
Ammbly HEXNam11 Opmllon Addressing
Page 781 and 782:
Hex Operation Codes00- BAK01 - ORA
Page 783 and 784:
Appendix3FTablesIII-353
Page 785 and 786:
Reserved Words and Predeclared Iden
Page 787 and 788:
Table F-2C. Identifiers Declared in
Page 789:
Summary of Size limitsTable F-4. Su
Page 794 and 795:
ContentsFigures and TablesviiPREFAC
Page 796 and 797:
CHAPTER4The P-Machine Instruction S
Page 798 and 799:
APPENDIX4AMemory Maps64K System Mem
Page 800 and 801:
Figure 3-5The Order of Local Variab
Page 803 and 804:
Chapter 1The Pascal EnvironmentIV-I
Page 805 and 806:
Figure 1-1. The Pascal 64K SystemlE
Page 807 and 808:
Figure 1-3. The Pascal 128K System:
Page 809 and 810:
Main Memory PointersNP points to th
Page 811 and 812:
Table 1-1. Version Flags Set at Loc
Page 813 and 814:
.INTERP+4Address of the location th
Page 815 and 816:
Chapter 2Disk FilesIV-13
Page 817 and 818:
{First, some general declarations r
Page 819 and 820:
GET, READ, and READLN convert DLE-b
Page 821 and 822:
Figure 2-2. A Typical Codefilehigh
Page 823 and 824:
Segments are not nested in codefile
Page 825 and 826:
RECORDDISKINFO: ARRAY[0 .. 15l OFRE
Page 827 and 828:
By the Way: Figure 2-4 shows lower
Page 829 and 830:
o Bit 12 of the SEG INFO word is un
Page 831 and 832:
Figure 2-5. Construction of Interfa
Page 833 and 834:
Figure 2-6. The Code Part of a Code
Page 835 and 836:
Figure 2-7. A Typical Procedurehigh
Page 837 and 838:
o PARAMETER SIZE: This field specif
Page 839 and 840:
Relocation TablesA relocation table
Page 841 and 842:
LITYPES = CEOFMARK, UNITREF, GLOBRE
Page 843 and 844:
ICOFFSET field specifies the locati
Page 845:
Procedure and Function Linker Infor
Page 848 and 849:
The previous chapter discussed the
Page 850 and 851:
o BASE: BASE procedure pointer. Thi
Page 852 and 853:
were part of the Pascal system glob
Page 854 and 855:
activation records; data segments d
Page 856 and 857:
A procedure call causes the operati
Page 859 and 860:
Chapter4The P-Machine Instruction S
Page 861 and 862:
Formats of Variables on the StackVa
Page 863 and 864:
the structure when padded. Before s
Page 865 and 866:
localSLDL_l 216 Short load local wo
Page 867 and 868:
Byte A.rray HandlingLDB 190STB 191L
Page 869 and 870:
LPA 208LDP 186STP 187UB,Load a pack
Page 871 and 872:
Noninteger ComparisonsThe next six
Page 873 and 874:
LNOT 147 Logical NOT. Push the one'
Page 875 and 876:
XJPI72WI,W2, ,W3Case jump. WI is w
Page 877 and 878:
EXIT 158 4 Exit from procedure. tos
Page 879 and 880:
DecimalOpcode Mnemonic Full Name Lo
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DecimalOpcode Mnemonic Full Name Lo
Page 884 and 885:
64K System MemorylExternal Language
Page 886 and 887:
128K System Auxiliary MemoryAuxilia
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Blocks in a Code Segmenthigh disk a
Page 890 and 891:
Segment Dictionarylow disk addresse
Page 892 and 893:
Code Part of a Code Segment~.r--'-"
Page 894 and 895:
6502 Procedure Attribute Tablebaser
Page 896 and 897:
Program Stackhigh memory addressesS
Page 898:
Activation Recordhigh memory addres
Page 902 and 903:
ContentsBibliographyReference Books
Page 904 and 905:
General Pascal TextbooksClancy, Mic
Page 907 and 908:
Glossaryactivation: The execution o
Page 909 and 910:
cold start: A startup procedurethat
Page 911 and 912:
file: See disk file, external file,
Page 913 and 914:
length attribute: The part of along
Page 915 and 916:
POINTERLIST: A list of pointersin L
Page 917 and 918:
segment table: A section of thehigh
Page 919:
USES declaration: The part of aPasc
Page 922 and 923:
o 48K Runtime System (Version 1.2 o
Page 925 and 926:
IndexCast of Characters*(asterisk)
Page 927 and 928:
ooleansassignment statements and II
Page 929 and 930:
DDATA III-215data directives II-187
Page 931 and 932:
Execute command, from Commandlevel
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GPWROFTEN III-83RANDOM III-85ROUND
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Link command, from Command levelII-
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0ODD function III-90OF III-117-118o
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parameters for III-130PENCOLOR III-
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Replace command ll-113-117delimiter
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storageof arrays III-328of booleans
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UNLINKED-INTRINS IV-26unsignedconst
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Apple Computer, Inc.20525 Mariani A
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