The DLRB routes the input/output data between the disk unit and the target computer.
 -an onboard data loader called the Multipurpose Disk Drive Unit (MDDU).
 The data loader complies with ARINC 615-1 definition and remains compatible with ARINC 603. The changes introduced by this new standard are:
 -the use of commercial 3.5 inch disks
R 1EFF : 106-149, 201-203, 211-299, 301-399, 1 31-38-00Page 12 1401-499, 1Config-2 Aug 01/05 1 1 1CES 1

R 
R  - passage to ARINC 429 high speed bus, while retaining low speed dialog 
R  capability 
R 
R  - application of the DOWNLOADING function. 
R 
R  ARINC 615-1 also defines the disk. It must be formatted under MS-DOS 3.3 
R  (Microsoft Disk Operating System version 3.3). 
R 
R  A special file called the CONFIGURATION FILE is defined to be included on 
R  the disk. This file, specific to the computer to be loaded contains all 
R  the information (transmission/reception bus speed, name of file to be 
R  loaded, etc.) required by the data loader to transfer the data. This file 
R  is never transferred to the computer memories. 
R 
R  A default configuration file is stored in the data loader with predefined 
R  parameters (default values). 
R 
R  This file is used by the data loader if the disk used: 
R 
R  - does not have a configuration file 
R 
R  - has an incomplete configuration file. 
R 
R  This configuration file is necessary for uploading. 
R 
R  This configuration file is not indispensable for downloading. 
R 
R  Operation mode is described in para. Operation/Control and Indicating.
 **ON A/C 151-199, 201-210,
 Post SB 31-1130 For A/C 201-203,
 A. Description
 The system comprises:
 - a data loading selector
 The DLS allows the user to control DLRB activity and operation mode. It
 permits to scroll into the target list of LRU, shown on the DLS
 display, and to select or unselect the desired LRU to be loaded.
 - a data loading routing box 

R 1EFF : 151-199, 201-210, 1 31-38-00Page 13 1 1 Config-2 May 01/05 1 1 1CES 1 The DLRB routes the input/output data between the disk unit and the

 target computer.
 -an onboard data loader called the Multipurpose Disk Drive Unit (MDDU).
 The data loader complies with ARINC 615-3 definition and remains compatible with ARINC 603. The changes introduced by this new standard are:
 -the use of commercial 3.5 inch disks
 -passage to ARINC 429 high speed bus, while retaining low speed dialog capability
 -application of the DOWNLOADING function.
 ARINC 615-1 also defines the disk. It must be formatted under MS-DOS 3.3 (Microsoft Disk Operating System version 3.3).
 A special file called the CONFIGURATION FILE is defined to be included on the disk. This file, specific to the computer to be loaded contains all the information (transmission/reception bus speed, name of file to be loaded, etc.) required by the data loader to transfer the data. This file is never transferred to the computer memories.
 A default configuration file is stored in the data loader with predefined parameters (default values).
 This file is used by the data loader if the disk used:
 -does not have a configuration file
 -has an incomplete configuration file.
 This configuration file is necessary for uploading.
 This configuration file is not indispensable for downloading.
 Operation mode is described in para. Operation/Control and Indicating.

R 1EFF : 151-199, 201-210, 1 31-38-00Page 14 1 1 Config-2 May 01/05 1 1 1CES 1

R **ON A/C 106-149, 151-199, 201-299, 301-399, 401-499,

 B. Architecture
 (1) Computer interface
 Each computer using the data loading system is connected to it by two ARINC 429 (input/output) buses and one associated Load Enable discrete.
 (a) Computers connected 1 Flight Management and Guidance Computers 1 and 2 (FMGC) (Ref.
_ 22-71-00) to periodically update the NAV data base (waypoints, navaids, runways, airports, etc.) that the FMGCs use to elaborate the flight plans.
 2 Centralized Fault Display Interface Unit (CFDIU) (31-32-00)
_ a To load the FILTER DATA BASE (31-38-00)
_
 b Other connections:

_
 -an input discrete is wired for test function
 -an output discrete is wired for test result. 3 Air Traffic Services Unit (ATSU) (46-21-00):
　
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