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CHAPTER 4: Hardware Installation
To observe the resources assigned by Windows 95/98 for the adapter, click on
Start, then Settings, then Control Panel, and then double-click on System. Click on
the Device Manager Tab, then double-click on 5250 Emulation Adapters. There
will be an entry for the 5250 PCI Adapter. Double-click on this entry and then
select the Resources tab. The display will now show the 5250 PCI Adapter Card
resources.
The resources can also be observed by executing the GETW95C.EXE program in
the 5250CARD directory. The resource information passed from Windows 95/98
to the CEM5250.VXD device driver will be displayed.
PCI Memory Resources
The PCI specifications allow the PCI card to be assigned memory resources
anywhere in the system memory. In most cases, the preferred memory location of
the PCI card is in lower memory (C800h, CC00h, D800h) to remain compatible
with legacy applications.
Some PC manufacturers have specifically reserved these memory locations for
motherboard or ISA resources. This can cause a problem when the PC’s BIOS tries
to assign a memory resource to the PCI card. Problems can include memory
conflicts, failure to boot, and system crashes.
In order to resolve this problem, the PCI card and the PCI Express Card use the
following methods.
PCI Card
The PCI Card can be programmed through software to function below and above
one megabyte in memory. The utility to program the PCI Card is called
PCISET.EXE and is found on disk 1 of the software diskettes. See Section 5.3 for
details about the PCISET program.
PCI Express Card
The PCI Express card has an on-board jumper that allows the card to be
configured for use above and below one megabyte in memory. See Figure 4-2 for
the location of this jumper.