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Workbench Disk: L Drawer

Contains device handlers, which are software modules that act between the AmigaDOS and the devices used by the Amiga.

Most handlers are treated as if they are actual physical devices and they are referred to by their device name.

Handlers must be named in the Mount file or MountList for their respective devices.

Handlers are called and manipulated by programs, not users. New handlers can be supplied with some devices or programs and should be copied to the L: Drawer.

Aux-Handler:
The Aux-Handler provides unbuffered serial input/output. It is essentially a console handler that uses the serial port rather than the Amiga screen and keyboard.

The DosDrivers mount file for AUX is:

  • Handler = L:Aux-Handler
  • Stacksize = 1000
  • Priority = 5
You could use Aux-Handler to use a serial terminal with your Amiga for example:

1.> newshell AUX:

Queue-Handler (PIPE:)
The Queue-Handler is an input/output mechanism used to provide I/O communication between programs it creates an inter process communication channel named PIPE.

Port-Handler
The Port-Handler is the AmigaDOS interface for the SER:, PAR:, and PRT: devices.

When accessing SER:, you can supply settings for the baud rate and control information. the method for doing this is SER:'baud/control', where control is a three character sequence indicate the following:

  • Number of read/write bits
    First character; either a 7 or 8
  • Parity
    Second character; N ( no parity ), O ( odd parity ), E ( even parity ), M ( mark parity ), S ( space parity )
  • Number of stop bits
    Third character; either 1 or 2
Example: SER:28800/8N1

If you do not specify any values when connecting to SER: the defaults in the Serial Preference Editor will be used.

CrossDOSFileSystem
The CrossDOSFileSystem is required to use CrossDOS.

FileSystem_Trans
The FileSystem_Trans directory contains the following files required for CrossDOS text translation:

  • Dansk.crossdos - Filters Danish text files
  • INTL.crossdos - Preserves international characters
  • MAC.crossdos - Converts Apple Macintosh ASCII files.
CDFileSystem
The CDFileSystem is required to use a CD-ROM Drive with the Amiga.

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