Phytec eGrabber-4plus, Руководство по оборудованию

Страница: 162 / 206

eGrabber-4plus
152 
PHYTEC Meßtechnik GmbH 2004 L-608e_4
5.3 Driver for DOS Applications
The PCI4GRAB driver library, can be found on the CD’s directory,
under PCIGRAB4\DRIVER\DOS\DRIVER. The eGrabber-4plus can
be adapted to DOS using this library.
5.3.1 Premises
Under the DOS operating system, it is required, that for the operation
of the eGrabber-4plus, the whole physical address area of the PC can
be addressed linearly. This is necessary, because the PCI-BIOS
configures the register area of the Grabber in the memory just
according to its own rules and the user has no influence. Usually high
addresses are utilized above the RAM region, which require special
addressing mechanisms.
Caution:
In order to utilize the DOS-driver, the DOS-Extender DOS/4GW has
to be installed. Programs, which drive the eGrabber-4plus under DOS
via the driver routines, have to be designed in such a way, that they
can operate with DOS/4GW.
DOS/4GW from Rational Systems is a DOS-Extender, which provides
protected-mode-access. Many compilers support the application of
DOS/4GW and allow combining it with EXE-files of the user
program.
Caution:
Some DOS-system programs may cause problems working together
with DOS/4GW. Especially the utilization of EMM386.EXE might be
problematical. Therefore we recommend not to use DOS/4GW and
EMM386.EXE simultaneously.