Amstrad DDI-1 manual Configuration Sector, Console control codes, Logging in a disc

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Firstly the AMSDOS command CPM loads the first sector of track 0 into the CPC464. On a system disc this sector has been arranged to be a program which then loads the rest of the system tracks into memory. Various checks are performed to determine that the system tracks contain valid CP/M software and to calculate where in memory to load them.

Part of CP/M is permanently in ROM inside the DDI-1 disc interface, the rest is loaded into RAM. In the standard configuration 39.75k of RAM is left for transient programs, with 2k of that used by the Console Command Processor which is loaded from the system tracks whenever the Direct Console Mode is re-entered.

3.3 Configuration Sector.

During the loading process, when CP/M is first activated, various system parameters are loaded from a special sector within the system tracks. These parameters include the Sign-On (wake-up) message, special keyboard codes required etc. The SETUP utility is provided to customise the configuration sector to your requirements.

3.4 Console control codes.

In the CP/M environment a variety of special key operations are used to control

program flow. These keystrokes replace the action of the [ESC]ape key used in AMSTRAD BASIC, although some applications packages may re-instate the [ESC] ape key with some of its former power.

[CTRL]S

halts the screen output from CP/M. Type any character to resume.

[CTRL]C

typed at the start of a line returns control to the Direct Console Mode.

 

Many utilities and applications programs will also recognise this as a

 

request to abandon the program.

[CTRL]P

hardcopy toggle. Turn on/off log of all screen output to printer.

[CTRL]Z

end of text.

3.5 Logging in a disc

Unless special action is taken by the CP/M program (as FILECOPY does for example) then CP/M will not allow you to write to a disc unless it has been 'logged in'. Furthermore the type of disc format (SYSTEM, DATA OR IBM) is only re- determined when a disc is logged in. For drive A this takes place whenever CP/M returns to the Direct Console Mode, or when [CTRL]C is typed at the A> or B> prompt. For Drive B this takes place the first time that the disc in drive B is accessed after drive A has been logged in.

Should you try writing to a disc that has not been logged in, the error message Bdos Err on <DRIVE> : R/O will be displayed. Press any key to continue. If the changed disc was also of a different format then A read or write error will occur. Type C to continue.

AMSTRAD Disc Drive & Interface DDI-1 Manual

Chapter 3.2

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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 ButtonRun rolcave Drive a disc missing Retry, Ignore or Cancel?Foundations Loading Software/Games ROLCAVE. not foundDrive a read fail Retry, Ignore or Cancel? Bad commandSyntax error Type mismatchFoundations Introducing Amsdos and CP/M Disc Drive B disc missing Retry, Ignore or CancelLoad filename Tape.inCpm 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 DisccopyWriting track 0 to Copying Using CopydiscCopying started Reading track 0 to Do you want to copy another disc Y/NDiscchk Checking DiscsAborting ChkdiscInstallation Amstrad Disc Drive & Interface DDI-1 Manual Backup Master Disc Making Working DiscsTurnkey Amstrad Basic discs Working SYSTEM/UTILITY discBasic only disc DISCCOPY.COMTurnkey Basic onto your Working disc Turnkey Basic using disc suppliedTurnkey CP/M Discs Creating a Turnkey CP/M System discAmbiguous 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 IntroductionConstruction of Filenames Disc DirectoryAmsdos filenames and filetypes Save PROG.BAS a Save Bprog .BAS Amsdos headersFilenames on two drives Saving variables and performing a Screen Dump Examples of Using Amsdos Commands in a programWild cards BERT.BAS FRED1.BAS FRED2.BAS FRED3.BAK FRED3.BAS FINISH.BASNeat CloseoutWhile not EOF Reference guide to Amsdos commandsPre-empting a Garbage Collection Wend CloseinSave OPENOUT, Print #9, Write #9, List #9, Closeout Summary of Basic commandsSummary of Amsdos external commands CATDisc CPMDIR DISC.INTape ERAREN TAPE.INAmsdos files with headers File Copying proceduresCopying Files Ascii filesFile has a header Amstrad Reference guide to Amsdos Error Messages Drive Drive read fail Drive Drive disc missingDrive Drive disc is write protected Drive Drive write failCP/M system tracks CP/M PrimerOperating with CP/M Logging in a disc Configuration SectorConsole control codes DIR command Direct Console CommandsSwitching default drives ERA commandType command Transient commandsREN command Peripheral ManagementWhole disc copiers and checkers File and disc copyingSingle file copying Cassette filesSystem Management StatStat SECRET.BAS $DIR SetupDo you want to update your system disc Y/N Is this correct Y/NFormat Disc GenerationAmsdos Format D Format I FormatMovcpm BootgenAdvanced programming SysgenAmstrad Disc Drive & Interface DDI-1 Manual What is Logo Introduction to LogoDr. Logo Getting StartedTo square Repeat 4 fd 60 rt 90 end Procedures with parametersRepeat 4 fd 60 rt To squareanysize side repeat 4 fd side rt 90 endCs squareanysize 100 rt 45 squareanysize Using Variables to remember valuesEditing programs and procedures To triangle Repeat 3 fd edge rt 120 endOperating hints Summary of Dr. Logo primitivesChar Word and List ProcessingAscii CountFput EmptypFirst ListArithmetic Operations Logical Operations Not ?= Logo LogoProcedures VariablesSetsplit EditingText Screen ShowType CleanGraphic Screen DotWindow PalSetpal Turtle Graphics WrapSeth SetpcErn Workspace ManagementSetpos NodesGprop RecycleGlist PlistSave Disc Files DirLoad KEYBOARD, Joystick buttonp?make key rc Paddle?paddle 0 ?keyEnt SoundEnv ReleaseRun LabelRepeat StopPause ErrorCatch ThrowSystem Properties Technical information for the user Firmware HeadersChanging Discs Store requirementsAmsdos messages Error MessagesBios messages Failed to load boot sector Disc Organisation Common to ALL FormatsReturn 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
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