3-4 DPP Software
297-1001-019 Standard 02.01 April 1997
The DSI provides an active interface by emulating the MTD functions and
providing two-way communication between the DPP and DMS-100.
Disk routines
The Disk Interface PCA has its own microprocessor and software routines.
Read, write, and retry (error recovery) instructions are resident in the disk
interface circuitry. Disk initialization, buffer management, directory
management, and file management modules are part of the disk programs.
There is also a communications package and an input/output handler program
included in the disk routines.
Downloading software to the DPP
When a situation arises where the DPP requires a download of software, it is
normally accomplished directly from the DMS-100, requiring no intervention
from the customer. There are two possible DPP conditions that require the
downloading of new software. They are as follows:
• The development of upgraded software to replace the existing DPP
program. This could range from a debugged version of the same program
to an entirely different program with updated features.
• An attempt to recover from a disk failure, in which the DPP is unable to
retrieve program software from either disk drive.
To Next Page
Loading...
Need help?
General
