Amstrad DDI-1 manual Dr. Logo, Getting Started

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4.2 Dr. LOGO

Dr LOGO is a thoughtful implementation of Logo which has been specially customised for the AMSTRAD CPC464, to make it even easier to program. Extensions have been included to make available the powerful sound facilities of the CPC464 and program editing is made easy by the inclusion of the cursor key cluster.

4.3 Getting Started

To operate Dr. Logo, insert a copy of SIDE 2 of your master disc into the disc drive. (The Foundation Course contains instructions on how to copy the master disc.)

Press the [CTRL], [SHIFT] and [ESC] keys simultaneously to reset the computer. Type in CPM [ENTER] and LOGO will load automatically.

The following Dr. Logo wake-up message will be displayed on your monitor: Welcome to

Amstrad LOGO V1.1

Copyright (c) 198314, Digital Research

Pacific Grove, California

Dr.Logo is a trademark of Digital Research

Please Wait

This greeting will soon disappear and a question mark prompt ? will appear on your screen.

The question mark tells you that Dr.Logo is waiting for you to type something at your keyboard.

4.4 FIRST STEPS

Try typing in (using lower case letters): fd 60[ENTER]

and you will see a turtle appear which then moves forward 60 units leaving a line behind it from where it started to where it finished. The screen will clear giving a large graphics area and a smaller text area with the ? prompt near the bottom of the screen. Dr. Logo will often decide to re-arrange the screen so as to give either a large text area or large graphics area, for your convenience.

Type in rt 90[ENTER] and the turtle will move 90 degrees to the right. (From now on we will assume that you press the [ENTER] key after every line of command.)

Now type in fd 60 and another line will be drawn the same length and at right angles to the first line.

Experiment with the simple instructions fd , bk (short for back), rt and lt (short for left) to see what happens on the screen.

AMSTRAD Disc Drive & Interface DDI-1 Manual

Chapter 4.2

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Contents Page Amstrad Disc Drive & Interface DDI-1 Amstrad Contents Contents Page Foundations 1 Setting Up Connecting the Mains LeadConnecting the DDI-1 to the Computer Computer Interface Unit Main Disc Drive Drive a Computer Foundations 2 About Discs Write ProtectionOpen Closed When Your Disc Is Indicator Lamp Eject ButtonDrive a disc missing Retry, Ignore or Cancel? Foundations Loading Software/GamesRun rolcave ROLCAVE. not foundBad command Syntax errorDrive a read fail Retry, Ignore or Cancel? Type mismatchFoundations Introducing Amsdos and CP/M Drive B disc missing Retry, Ignore or Cancel Load filenameDisc Tape.inFirst Steps Using The CP/M Disc Storing Data Onto DiscCpm CLS? Back to Amsdos BewareSaving a Program in Memory onto Disc Catalog Loading From DiscEXAMPLE.BAS Copying Programs From Disc to Disc Copying Programs From Cassette to DiscCopying Programs From Disc to Cassette Copying Using the CP/M System Disc Copying Using DisccopyCopying Using Copydisc Copying started Reading track 0 toWriting track 0 to Do you want to copy another disc Y/NChecking Discs AbortingDiscchk ChkdiscInstallation Amstrad Disc Drive & Interface DDI-1 Manual Backup Master Disc Making Working DiscsWorking SYSTEM/UTILITY disc Basic only discTurnkey Amstrad Basic discs DISCCOPY.COMTurnkey Basic using disc supplied Turnkey CP/M DiscsTurnkey Basic onto your Working disc Creating a Turnkey CP/M System discConfiguring a CP/M Program Configuring the Output from the packageAmbiguous filename Confirm individual files Y/N ? Configuring the Input to the package Starting a Turnkey CP/M PackagePayroll Autostarting a Turnkey CP/M Package Amsdos Primer IntroductionDisc Directory Amsdos filenames and filetypesConstruction of Filenames Amsdos headers Filenames on two drivesSave PROG.BAS a Save Bprog .BAS 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.BASNeat CloseoutReference guide to Amsdos commands Pre-empting a Garbage CollectionWhile not EOF Wend CloseinSummary of Basic commands Summary of Amsdos external commandsSave OPENOUT, Print #9, Write #9, List #9, Closeout CATCPM DIRDisc DISC.INERA RENTape TAPE.INFile Copying procedures Copying FilesAmsdos files with headers Ascii filesFile 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 failCP/M Primer Operating with CP/MCP/M system tracks Configuration Sector Console control codesLogging in a disc Direct Console Commands Switching default drivesDIR command ERA commandTransient commands REN commandType command Peripheral ManagementFile and disc copying Single file copyingWhole disc copiers and checkers Cassette filesSystem Management StatSetup Do you want to update your system disc Y/NStat SECRET.BAS $DIR Is this correct Y/NDisc Generation AmsdosFormat Format D Format I FormatBootgen Advanced programmingMovcpm SysgenAmstrad Disc Drive & Interface DDI-1 Manual What is Logo Introduction to LogoDr. Logo Getting StartedProcedures with parameters Repeat 4 fd 60 rtTo square Repeat 4 fd 60 rt 90 end To squareanysize side repeat 4 fd side rt 90 endUsing Variables to remember values Editing programs and proceduresCs squareanysize 100 rt 45 squareanysize To triangle Repeat 3 fd edge rt 120 endOperating hints Summary of Dr. Logo primitivesWord and List Processing AsciiChar CountEmptyp FirstFput ListArithmetic Operations Logical Operations Not ?= Logo LogoProcedures VariablesEditing Text ScreenSetsplit ShowClean Graphic ScreenType DotPal SetpalWindow Turtle Graphics WrapSeth SetpcWorkspace Management SetposErn NodesRecycle GlistGprop PlistDisc Files Dir LoadSave KEYBOARD, Joystick buttonpPaddle ?paddle 0?make key rc ?keySound EnvEnt ReleaseLabel RepeatRun StopError CatchPause ThrowSystem Properties Technical information for the user Firmware HeadersChanging Discs Store requirementsError Messages Bios messagesAmsdos messages Failed to load boot sector Disc Organisation Common to ALL FormatsJump Block Interception by Amsdos Jump Block Re-Interception by the UserReturn Parameters Intercepted Firmware Calls 132 #BC8C 133 #BC8F 134 #BC92 135 #BC95 #BC98137 #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