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- Document 1609
- Applications that Check the DOS Version Number
-
- Initials:
- 11/26/91
- DRDOS 6.0
-
- Keywords:
- COMPAQ
- 3.31
-
- Description:
-
- The DR DOS 6.0 Version Numbers
-
- A few applications and device drivers have been encountered which,
- when loading under the DR DOS 6.0 operating system, display an error
- message that states the current version of operating system is not
- supported. This can occur for several reasons, which are outlined
- below.
-
- Device drivers for disk drives or networks are sometimes produced
- for specific versions of DOS or occasionally will use specific configurations
- for different versions of DOS. The DR DOS 6.0 operating system will
- appear to be COMPAQ DOS 3.31 to applications and drivers. Usually,
- a DOS 3.3 driver works properly. If you have been running previously
- with MS/PC DOS 4.x, the driver that you have been using might be designed
- specifically for that version. Contact the manufacturer of the driver
- to see if they have any specific configuration information or drivers
- for DOS 3.3x.
-
- When applications request the DOS version number from the operating
- system, the DR DOS 6.0 operating system returns version 3.31. The
- application then knows that it should expect support for DOS 3.3-level
- calls and support for larger than 32 Mbyte partitions using the COMPAQ
- Extended Interrupt 25 and 26 convention. Most applications do follow
- these conventions and therefore work without any difficulty.
-
- However, some applications have been designed to go beyond those conventions
- and actually attempt to directly manipulate DOS data structures or
- replace sections of the operating system code with their own. These
- applications depend on having intimate knowledge of each DOS version
- they detect and have been written to react differently for each of
- those versions. If an application uses this type of technique, the
- manufacturer will have to design the application to take the DR DOS
- 6.0 operating system into account as well. It is possible that the
- manufacturer has already produced another version of your application
- that runs under the DR DOS 6.0 operating system. Contact the manufacturer
- to see if there is any information about upgrades or specific configuration
- steps for the DR DOS 6.0 operating system. If the manufacturer is
- interested in more information about the DR DOS 6.0 operating system,
- they are welcome to contact Digital Research Inc. directly and we
- will work with them on the situation.
-