Logical Operations | Amstrad DDI-1 specification

+

Outputs the sum of the input numbers.

?+ 2 2 4 ?2+2 4

-

Outputs the difference of the two input numbers.

?- 10 5 5 ?10-5 5

*

Outputs the product of input numbers.

?* 4 6 24 ?4*6 24

/

Outputs the decimal quotient of the two input numbers.

?/ 25 5 5 ? 25/5 5

4.10.3LOGICAL OPERATIONS:

and

Outputs TRUE if the result of all input expressions are true.

?and(3<4)(7>4)

TRUE

Chapter 4.9

AMSTRAD Disc Drive & Interface DDI-1 Manual

Image 67

Amstrad DDI-1 manual Logical Operations

Contents

Page Amstrad Disc Drive & Interface DDI-1 Amstrad Contents Contents Page Connecting the Mains Lead Foundations 1 Setting Up Connecting the DDI-1 to the Computer Computer Interface Unit Main Disc Drive Drive a Computer Write Protection Foundations 2 About Discs Open Closed When Your Disc Is Eject Button Indicator Lamp ROLCAVE. not found Drive a disc missing Retry, Ignore or Cancel?Foundations Loading Software/Games Run rolcave Type mismatch Bad commandSyntax error Drive a read fail Retry, Ignore or Cancel? Foundations Introducing Amsdos and CP/M Tape.in Drive B disc missing Retry, Ignore or CancelLoad filename Disc Storing Data Onto Disc First Steps Using The CP/M DiscCpm CLS? Beware Back to AmsdosSaving a Program in Memory onto Disc Loading From Disc CatalogEXAMPLE.BAS Copying Programs From Cassette to Disc Copying Programs From Disc to DiscCopying Programs From Disc to Cassette Copying Using Disccopy Copying Using the CP/M System Disc Do you want to copy another disc Y/N Copying Using CopydiscCopying started Reading track 0 to Writing track 0 to Chkdisc Checking DiscsAborting Discchk Installation Amstrad Disc Drive & Interface DDI-1 Manual Making Working Discs Backup Master Disc DISCCOPY.COM Working SYSTEM/UTILITY discBasic only disc Turnkey Amstrad Basic discs Creating a Turnkey CP/M System disc Turnkey Basic using disc suppliedTurnkey CP/M Discs Turnkey Basic onto your Working disc Configuring the Output from the package Configuring a CP/M ProgramAmbiguous filename Confirm individual files Y/N ? Starting a Turnkey CP/M Package Configuring the Input to the packagePayroll Autostarting a Turnkey CP/M Package Introduction Amsdos Primer Amsdos filenames and filetypes Disc DirectoryConstruction of Filenames Filenames on two drives Amsdos headersSave PROG.BAS a Save Bprog .BAS BERT.BAS FRED1.BAS FRED2.BAS FRED3.BAK FRED3.BAS FINISH.BAS Examples of Using Amsdos Commands in a programWild cards Saving variables and performing a Screen Dump Closeout Neat Wend Closein Reference guide to Amsdos commandsPre-empting a Garbage Collection While not EOF CAT Summary of Basic commandsSummary of Amsdos external commands Save OPENOUT, Print #9, Write #9, List #9, Closeout DISC.IN CPMDIR Disc TAPE.IN ERAREN Tape Ascii files File Copying proceduresCopying Files Amsdos files with headers File has a header Amstrad Reference guide to Amsdos Error Messages Drive Drive write fail Drive Drive disc missingDrive Drive disc is write protected Drive Drive read fail Operating with CP/M CP/M PrimerCP/M system tracks Console control codes Configuration SectorLogging in a disc ERA command Direct Console CommandsSwitching default drives DIR command Peripheral Management Transient commandsREN command Type command Cassette files File and disc copyingSingle file copying Whole disc copiers and checkers Stat System Management Is this correct Y/N SetupDo you want to update your system disc Y/N Stat SECRET.BAS $DIR Format D Format I Format Disc GenerationAmsdos Format Sysgen BootgenAdvanced programming Movcpm Amstrad Disc Drive & Interface DDI-1 Manual Introduction to Logo What is Logo Getting Started Dr. Logo To squareanysize side repeat 4 fd side rt 90 end Procedures with parametersRepeat 4 fd 60 rt To square Repeat 4 fd 60 rt 90 end To triangle Repeat 3 fd edge rt 120 end Using Variables to remember valuesEditing programs and procedures Cs squareanysize 100 rt 45 squareanysize Summary of Dr. Logo primitives Operating hints Count Word and List ProcessingAscii Char List EmptypFirst Fput Arithmetic Operations Logical Operations ?= Logo Logo Not Variables Procedures Show EditingText Screen Setsplit Dot CleanGraphic Screen Type Setpal PalWindow Wrap Turtle Graphics Setpc Seth Nodes Workspace ManagementSetpos Ern Plist RecycleGlist Gprop KEYBOARD, Joystick buttonp Disc Files DirLoad Save ?key Paddle?paddle 0 ?make key rc Release SoundEnv Ent Stop LabelRepeat Run Throw ErrorCatch Pause System Properties Headers Technical information for the user Firmware Store requirements Changing Discs Bios messages Error MessagesAmsdos messages Failed to load boot sector Common to ALL Formats Disc Organisation Jump Block Re-Interception by the User Jump Block Interception by AmsdosReturn Parameters 132 #BC8C 133 #BC8F 134 #BC92 135 #BC95 #BC98 Intercepted Firmware Calls137 #BC9B 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