Not, ?= Logo Logo | Amstrad DDI-1 specs

not

Outputs TRUE if the input expression is FALSE; FALSE if the input expression is TRUE.

?not (3=4)

TRUE

?not (3=3)

FALSE

or

Outputs FALSE if all input expressions are FALSE.

?or "TRUE "FALSE TRUE

?or (3=4)(1=1)

TRUE

=

Outputs TRUE if the two input objects are equal; otherwise outputs FALSE.

?= "LOGO "LOGO

TRUE ?1=2

FALSE

>

Outputs TRUE if the first input word is greater than the second; otherwise outputs

FALSE.

?> 19 20

FALSE ?20>19

TRUE

<

Outputs TRUE if the first word is less than the second; otherwise outputs FALSE.

?< 27 13

FALSE ?13<27

TRUE

AMSTRAD Disc Drive & Interface DDI-1 Manual

Chapter 4.10

Image 68

Contents

Page Amstrad Disc Drive & Interface DDI-1 Amstrad Contents Contents Page Foundations 1 Setting Up Connecting the Mains Lead Connecting the DDI-1 to the Computer Computer Interface Unit Main Disc Drive Drive a Computer Foundations 2 About Discs Write Protection Open Closed When Your Disc Is Indicator Lamp Eject Button Drive a disc missing Retry, Ignore or Cancel? Foundations Loading Software/GamesRun rolcave ROLCAVE. not found Bad command Syntax errorDrive a read fail Retry, Ignore or Cancel? Type mismatch Foundations Introducing Amsdos and CP/M Drive B disc missing Retry, Ignore or Cancel Load filenameDisc Tape.in Cpm First Steps Using The CP/M DiscStoring Data Onto Disc CLS? Saving a Program in Memory onto Disc Back to AmsdosBeware EXAMPLE.BAS CatalogLoading From Disc Copying Programs From Disc to Cassette Copying Programs From Disc to DiscCopying Programs From Cassette to Disc Copying Using the CP/M System Disc Copying Using Disccopy Copying Using Copydisc Copying started Reading track 0 toWriting track 0 to Do you want to copy another disc Y/N Checking Discs AbortingDiscchk Chkdisc Installation Amstrad Disc Drive & Interface DDI-1 Manual Backup Master Disc Making Working Discs Working SYSTEM/UTILITY disc Basic only discTurnkey Amstrad Basic discs DISCCOPY.COM Turnkey Basic using disc supplied Turnkey CP/M DiscsTurnkey Basic onto your Working disc Creating a Turnkey CP/M System disc Ambiguous filename Confirm individual files Y/N ? Configuring a CP/M ProgramConfiguring the Output from the package Payroll Configuring the Input to the packageStarting a Turnkey CP/M Package Autostarting a Turnkey CP/M Package Amsdos Primer Introduction Construction of Filenames Disc DirectoryAmsdos filenames and filetypes Save PROG.BAS a Save Bprog .BAS Amsdos headersFilenames on two drives Examples of Using Amsdos Commands in a program Wild cardsSaving variables and performing a Screen Dump BERT.BAS FRED1.BAS FRED2.BAS FRED3.BAK FRED3.BAS FINISH.BAS Neat Closeout Reference guide to Amsdos commands Pre-empting a Garbage CollectionWhile not EOF Wend Closein Summary of Basic commands Summary of Amsdos external commandsSave OPENOUT, Print #9, Write #9, List #9, Closeout CAT CPM DIRDisc DISC.IN ERA RENTape TAPE.IN File Copying procedures Copying FilesAmsdos files with headers Ascii files File has a header Amstrad Reference guide to Amsdos Error Messages Drive Drive disc missing Drive Drive disc is write protectedDrive Drive read fail Drive Drive write fail CP/M system tracks CP/M PrimerOperating with CP/M Logging in a disc Configuration SectorConsole control codes Direct Console Commands Switching default drivesDIR command ERA command Transient commands REN commandType command Peripheral Management File and disc copying Single file copyingWhole disc copiers and checkers Cassette files System Management Stat Setup Do you want to update your system disc Y/NStat SECRET.BAS $DIR Is this correct Y/N Disc Generation AmsdosFormat Format D Format I Format Bootgen Advanced programmingMovcpm Sysgen Amstrad Disc Drive & Interface DDI-1 Manual What is Logo Introduction to Logo Dr. Logo Getting Started Procedures with parameters Repeat 4 fd 60 rtTo square Repeat 4 fd 60 rt 90 end To squareanysize side repeat 4 fd side rt 90 end Using Variables to remember values Editing programs and proceduresCs squareanysize 100 rt 45 squareanysize To triangle Repeat 3 fd edge rt 120 end Operating hints Summary of Dr. Logo primitives Word and List Processing AsciiChar Count Emptyp FirstFput List Arithmetic Operations Logical Operations Not ?= Logo Logo Procedures Variables Editing Text ScreenSetsplit Show Clean Graphic ScreenType Dot Window PalSetpal Turtle Graphics Wrap Seth Setpc Workspace Management SetposErn Nodes Recycle GlistGprop Plist Disc Files Dir LoadSave KEYBOARD, Joystick buttonp Paddle ?paddle 0?make key rc ?key Sound EnvEnt Release Label RepeatRun Stop Error CatchPause Throw System Properties Technical information for the user Firmware Headers Changing Discs Store requirements Amsdos messages Error MessagesBios messages Failed to load boot sector Disc Organisation Common to ALL Formats Return Parameters Jump Block Interception by AmsdosJump Block Re-Interception by the User 137 #BC9B Intercepted Firmware Calls132 #BC8C 133 #BC8F 134 #BC92 135 #BC95 #BC98 Page Appendix Glossary of Terms CP/M Dr.Logo Primitives TPA Amstrad Disc Drive & Interface DDI-1 Manual Appendix Term Limitations of Remedies Amstrad Disc Drive & Interface DDI-1 Manual Appendix Index ERA Setpos