User`s manual

Rastergraf
Installing Your Peritek Graphics Board 2-3
2.3 Preparing for Installation
The Eclipse3 includes three different board form factors: PMC, PCI, and
CompactPCI. In order to ease the procedure, there follows individual
sections that deal with each board type. There really aren’t any model
dependencies that affect the board installation.
2.3.1 Interrupt Settings
The Eclipse3 boards use the PCI/PMC/CPCI INTA interrupt request line
for the particular slot it is plugged into. In some computers, each slot may
map its local interrupt lines to a permuted set of INTA-INTD, which
means that the board will show up on a different interrupt line according
to the slot it is plugged into. The device driver will usually notice this and
compensate for it. In any case, the user has no direct control (e.g. jumpers)
over what interrupt line the graphics board will use.
2.3.2 Address Settings
Since the PCI bus and the Eclipse3 are configured by the operating system
and/or BIOS while booting up, there aren’t any address jumpers. The
address settings are programmable and are set up by the Eclipse3 software
as a result of information supplied by the OS at boot time. Refer to the
Rastergraf software User’s Manuals for more information.
The software sets up the BARs (Base Address Registers) in the Rastergraf
Borealis Graphics Processor that enable access to its control registers,
internal RAMDAC, DDC2B/ I
2
C control lines, and SGRAM.
The Rastergraf Eclipse3 device driver will load the BARs if the O/S or
BIOS did not. If you can determine the actual PCI base address, you might
even be able to probe the address spaces with an on-line debugger once
the driver code has run. Section 3.3 has details on how the Borealis
controls access to the on-board registers.
The ability to probe the board is dependent on the CPU memory map as
implemented by the system OS and the address ranges of the PCI bus as
determined by the CPU hardware. These things change from OS to OS,
board to board, and vendor to vendor, making it a difficult task. Most
likely, if you use Rastergraf supplied software, the board will show up and
you will get pictures.