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Appendix A - DOS Extenders
DOS is not recommended with the PCI-60A because its native address space is limited to
1 MByte. Although the PCI-60A can be located within this 1 MByte address space, this
configuration has not been tested and is not recommended. The PCI-60A is normally
located above the 1 MByte boundary that DOS cannot directly access. If your application
requires a DOS environment, then both a DOS Extender and a PC/AT platform with an
Intel 386SX/DX, 486SX/DX, or higher processor are required.
A DOS Extender allows a user to access memory beyond the 1 MByte (extended memory)
limit of DOS by running any application in the 16-bit protected mode of the Intel 80386,
486, or Pentium microprocessor. With a DOS Extender, an application can directly access
up to 16 Mbytes of memory in a PC/AT system running under DOS.
A user may access the extended memory with DOS 5.0 or 6.0 specific utility calls.
Implementation of these utilities is beyond the scope of this user manual.
The user may contact the following DOS Extender vendors for any DOS Extender
questions and literature:
PHAR LAP SOFTWARE, INC.
60 Aberdeen Avenue
Cambridge, MA 02138
Tel: (617) 661-1510
TENBERRY SOFTWARE, INC. (formerly RATIONAL SYSTEMS, INC.)
P.O. Box 20050
Fountain Hills, AZ 85269-0050
Tel: (480) 767-8868
ERGO COMPUTING, INC.
One Intercontinental Way
Peabody, MA 01960
Tel: (800) 633-1925
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
