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Amstrad DDI-1 manual CP/M Primer, Operating with CP/M, CP/M system tracks

Models: DDI-1

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Chapter 3 CP/M Primer

Operating with CP/M

Subjects covered in this chapter:

•Booting CP/M

•Configuration sector

•Direct console mode

•Transient programs

•Managing peripherals

CP/M is a disc operating system. It is a special program which gives you access to the full power of your CPC464 disc system. Because CP/M is available for so many different computers it means that there are thousands of applications packages available for you to choose from and a whole wealth of knowledge and experience for you to draw upon.

Full details of CP/M including information on how to write your own programs and the information for the CPC464 implementation are contained in SOFT159 A Guide to CP/M.

3.1 Introduction.

The CP/M operating system provides a user interface for disc hardware - a way for you to communicate with the computer and manipulate files and peripherals.

The fundamental interface that is available is called the Direct Console Mode and is identified by the A> or B> prompt. Certain built-in commands are available but the majority of the functionality is obtained by loading and running 'Transient Programs'. They are called 'transient' because they are only in the computer (rather than on the disc) whilst you are using them, as opposed to being built-in.

As well as standard CP/M error messages the AMSTRAD disc system also generates a number of specialised hardware error messages. Refer to section 2.7 of the AMSDOS primer.

3.2 CP/M system tracks

The major part of CP/M resides on the outermost two tracks of the disc. The DDI-1 disc interface loads CP/M from these tracks into the CPC464 memory using a two stage process.

Chapter 3.1

AMSTRAD Disc Drive & Interface DDI-1 Manual

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Amstrad DDI-1 manual CP/M Primer, Operating with CP/M, CP/M system tracks

Contents

Page Amstrad Disc Drive & Interface DDI-1 Amstrad Contents Contents Page Connecting the Mains Lead Foundations 1 Setting UpConnecting the DDI-1 to the Computer Computer Interface Unit Main Disc Drive Drive a Computer Write Protection Foundations 2 About DiscsOpen Closed When Your Disc Is Eject Button Indicator LampFoundations Loading Software/Games Drive a disc missing Retry, Ignore or Cancel?Run rolcave ROLCAVE. not foundSyntax error Bad commandDrive a read fail Retry, Ignore or Cancel? Type mismatchFoundations Introducing Amsdos and CP/M Load filename Drive B disc missing Retry, Ignore or CancelDisc Tape.inStoring 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 DiscCopying started Reading track 0 to Copying Using CopydiscWriting track 0 to Do you want to copy another disc Y/NAborting Checking DiscsDiscchk ChkdiscInstallation Amstrad Disc Drive & Interface DDI-1 Manual Making Working Discs Backup Master DiscBasic only disc Working SYSTEM/UTILITY discTurnkey Amstrad Basic discs DISCCOPY.COMTurnkey CP/M Discs Turnkey Basic using disc suppliedTurnkey Basic onto your Working disc Creating a Turnkey CP/M System discConfiguring 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 PrimerAmsdos filenames and filetypes Disc DirectoryConstruction of Filenames Filenames on two drives Amsdos headersSave PROG.BAS a Save Bprog .BAS Wild cards Examples of Using Amsdos Commands in a programSaving variables and performing a Screen Dump BERT.BAS FRED1.BAS FRED2.BAS FRED3.BAK FRED3.BAS FINISH.BASCloseout NeatPre-empting a Garbage Collection Reference guide to Amsdos commandsWhile not EOF Wend CloseinSummary of Amsdos external commands Summary of Basic commandsSave OPENOUT, Print #9, Write #9, List #9, Closeout CATDIR CPMDisc DISC.INREN ERATape TAPE.INCopying Files File Copying proceduresAmsdos files with headers Ascii filesFile has a header Amstrad Reference guide to Amsdos Error Messages Drive Drive disc is write protected Drive Drive disc missingDrive Drive read fail Drive Drive write failOperating with CP/M CP/M PrimerCP/M system tracks Console control codes Configuration SectorLogging in a disc Switching default drives Direct Console CommandsDIR command ERA commandREN command Transient commandsType command Peripheral ManagementSingle file copying File and disc copyingWhole disc copiers and checkers Cassette filesStat System ManagementDo you want to update your system disc Y/N SetupStat SECRET.BAS $DIR Is this correct Y/NAmsdos Disc GenerationFormat Format D Format I FormatAdvanced programming BootgenMovcpm SysgenAmstrad Disc Drive & Interface DDI-1 Manual Introduction to Logo What is LogoGetting Started Dr. LogoRepeat 4 fd 60 rt Procedures with parametersTo square Repeat 4 fd 60 rt 90 end To squareanysize side repeat 4 fd side rt 90 endEditing programs and procedures Using Variables to remember valuesCs squareanysize 100 rt 45 squareanysize To triangle Repeat 3 fd edge rt 120 endSummary of Dr. Logo primitives Operating hintsAscii Word and List ProcessingChar CountFirst EmptypFput ListArithmetic Operations Logical Operations ?= Logo Logo NotVariables ProceduresText Screen EditingSetsplit ShowGraphic Screen CleanType DotSetpal PalWindow Wrap Turtle GraphicsSetpc SethSetpos Workspace ManagementErn NodesGlist RecycleGprop PlistLoad Disc Files DirSave KEYBOARD, Joystick buttonp?paddle 0 Paddle?make key rc ?keyEnv SoundEnt ReleaseRepeat LabelRun StopCatch ErrorPause ThrowSystem Properties Headers Technical information for the user FirmwareStore requirements Changing DiscsBios messages Error MessagesAmsdos messages Failed to load boot sector Common to ALL Formats Disc OrganisationJump 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