Overview
Chapter contents
Pervasive PSQL v9 Service Pack 2 supports DOS Btrieve applications in several different ways. The exact method, however, depends on the current configuration and environment of the workstation.
Requesters Available to Access Workgroup Engines
The following choices are available:
- Win32 DOS Box support: Allows a DOS application to run in a DOS box on a Windows 32-bit platform or on a Windows 98/ME workstation. This enables direct communication to the Windows 32-bit workstation components rather than to the database engine. This configuration can be used with either a local Pervasive PSQL Workgroup engine, or a remote engine. The TCP/IP, SPX, or NetBIOS protocol supported for client/server access depends on the configuration of the Windows 32-bit components.
Note
DOS Box support must be used for Workgroup engine. This engine does not support the DOS requesters described below.
Requesters Available to Access Remote Server Engines
You can use Win32 DOS Box support described previously to connect to remote server engines. In addition, you can use these other requesters:
- DOS TCP/IP requester (BREQTCP): Allows a DOS application to run in any Windows DOS box or on a DOS workstation, and communicate to a remote Pervasive PSQL Server engine via the TCP/IP protocol.
- DOS SPX requester (BREQUEST or BREQNT): Allows a DOS application to run in any Windows DOS box or on a DOS workstation, and communicate to a remote Pervasive PSQL Server engine via the SPX protocol.
Note
BREQTCP, BREQUEST, and BREQNT are explained in Getting Started With Pervasive PSQL (Server edition).
There are different reasons for using these different options, including:
- Pervasive PSQL v9 Service Pack 2 Workgroup products support only the Win32 DOS Box configuration.
- DOS and Windows 3.1x operating systems require the DOS TCP/IP or SPX requesters when accessing a remote server engine.
- Any given network environment must have only one of the supported protocols available.
Supported Configurations
The table below shows the DOS requester configurations that are supported.
Table 9-1 Supported DOS Requester Configurations
|
Requester
|
Workgroup
|
Client to Remote Server Engine
|
Client to Remote Server Engine
|
|
DOS Box
|
|
|
|
|
BREQTCP
|
|
TCP/IP only
|
TCP/IP only
|
|
BREQNT
|
|
SPX only
|
SPX only
|
|
BREQUEST
|
|
SPX to NetWare only
|
SPX to NetWare only
|
