Specifications

EPC-8 Hardware Reference
I I
I-14
Display drivers
The Cirrus Logic video controller is 100% VGA compatible. The display drivers
described in this manual are supplied to improve the resolution for each supported
software application package.
The installation instructions for each display driver will follow the introduction
section. Follow the instructions carefully to be sure that each display driver is
correctly installed. All of the installation instructions assume that VGA Disk 1 of 2 is
located in drive A:. If drive B: is used, the instructions should be changed
appropriately.
Before you begin
Not all video modes will be available on all systems. If an extended mode driver is
installed for a video mode that is not available, the application program will not
function properly. There are a number of things that determine the list of available
video modes. Some of these include the current monitor type, the amount of installed
memory, and the revision of the controller. To determine which modes are available
before beginning the driver installation, it is recommended that the user run the
CLMode program and examine the list of available video modes.
Microsoft Windows 3.1
Before upgrading from a previous release
Before installing the new drivers you should use Windows Setup to select the VGA or
SUPERVGA video driver so that when you install the new drivers, there is no chance
of overwriting the driver that Windows is using to control your screen. Next go to the
system directory, and find a file that is named OEM?.INF where the question mark is
a number. There may be more than one of these. These files are the different
OEMSETUP.INF files that have been used to configure Windows for different
devices. Using a text editor, such as Notepad or Edit, look at them until you find the
one that is for the previous version of the Cirrus Logic video drivers and delete it.
This is not completely necessary, but if you don't delete old files the drop down box
for Setup soon becomes very cluttered with different versions of the same files. Also,
in many cases the old files have been overwritten by newer ones, so no longer exist
anyway.
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