BCM Advanced Research
36
•
PCI memory space on top of main memory.
•
Any access to the PCI or AT bus.
Address Maps
Memory Map
The following table describes the breakdown of the IN440EX memory areas and how
they are assigned.
Table 2.5. Memory Map
LOCATION
SIZE
TO
DESCRIPTION
0FFFFFFF-FFFFFFFF
256MB
4GB
BIOS ROM
000E0000-000FFFFF
128KB
1MB
System BIOS (Shadowed in DRAM)
000C8000-000DFFFF
96KB
896KB
Expansion region (Shadowed in DRAM)
000C0000-000C7FFF
32KB
800KB
Video BIOS (Shadowed in DRAM)
000A0000-000BFFFF
128KB
768KB
Video Buffer (SMM space Non-Cacheable)
00080000-0009FFFF
128KB
640KB
Optional memory space gap (DOS Apps)
00000000-0007FFFF
512KB
512KB
DOS applications (No read/write protect)
(Always cacheable)
Video Subsystem
3D RAGE PRO Graphics Controller is a highly integrated graphics controller.
Incorporated within this single chip are the 2D, 3D and video accelerators, palette DAC,
and quadruple clock synthesiser. This multi-function integrated controller delivers superior
3D performance, TV-quality scaled video optimized for MPEG playback, industry-leading
Mach64 2D performance, and video expansion capability suited for video conferencing,
cable TV viewing, and hardware MPEG decoding.
The availability of ATI BIOS, drivers, utilities, and application software developed for the
entire chip family is a major strength for the 3D RAGE PRO. Being register-compatible
with all other controllers in the Mach64 accelerator series means immediate compatibility
with a wide range of application drivers. Since this controller is also pin-compatible with
ATI's family of other mach64 integrated controllers, it provides to the OEM a low-cost
upgrade path to additional features and performance.
This controller uses active power management techniques to monitor activity levels within
its’ self and to perform real-time power reductions such as dynamic clock control and
graphics engine shutdown. Because full-speed operation can be restored without delay,
these techniques do not impact performance. Major advances have been included in this
chip to boost performance in the area of a new bus interface, Accelerated Graphics Port
