OS/2 2.x Device Managers (DMD) - Course OS2DD305
   Logical Device Interface Layer for SCSI and other I/O interfaces

Objective
======================
   To expedite Independent Hardware Vendors (IHV) support of OS/2 2.x
by writing device drivers (DD) to support various PC I/O devices such
as CDROM, WOM, etc.
   Since SCSI supports multiple device types, a ladder of Device Drivers
exist under OS/2 to partition I/O bus dependent code (ADD) from
I/O bus-independent code (DMD).
   This class will identify the protocol on how to implement a Device Manager
(DMD) in order to provide a uniform interface between clients and Adapter
Device Drivers (ADD).  Installation and debug techniques will
also be covered.

Target audience
======================
IBM or IHV programmers who code device drivers for logical devices
such as CDROM, WOM, etc.  The code developed in this module is independent
of the physical connection (i.e. SCSI, proprietary) to the logical device.

Attendee prerequisites
======================
   a. Programming expertise: C (MASM useful)
   b. Knowledge of OS/2 1.x Physical DD (attend OS2DD101 or equivalent)
   c. Knowledge of IHV programming protocol
   d. Purchased development software (MASM 5.1, MSC 6.0, DDK, OS/2 2.1)

Course length: 5 days

Outline
======================
OS/2 Structure
Device Driver types
Driver Stack under OS/2 2.0
   Adapter Device Driver (ADD)
   Filter ADD
   Device Manager (DM)
CONFIG.SYS
   Installation (BASEDEV= )
Boot sequence
DMD Development considerations
   Command line parameters
  Error handling
IORB
   Control
   Format
Device Table Structure
OS2DASD.DMD example walkthrough
   Sample Code layout
Device Driver Profiles
DAK contents
   Organization, Build tree
   Tools
      Display test tool (DTT)
         Test case DLLs
 Lab:  device driver development