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M440LX Server System Product Guide
31
PCI Expansion Slots
The seven PCI bus master slots on the system board provide for expansion
and performance enhancement. One of the PCI connectors shares a
common chassis I/O expansion slot with an ISA connector; you can use
either PCI or ISA in the slot, but not both.
The PCI bus operates at up to 33 MHz and provides
• 32-bit memory addressing
• Support for 5 V and 3.3V cards
• Burst transfers of up to 133 MB per second
• 8-, 16-, or 32-bit data transfers
• Plug and Play configuration
• Hierarchical bus to maximize connectivity
PCI Video Controller
The onboard Cirrus Logic CL-GD54M40 32-bit video graphics accelerator
contains a super video graphics array (SVGA) controller that is fully
compatible with these video standards: CGA
†
, EGA
†
, Hercules
†
Graphics,
MDA
†
, and VGA. The standard server configuration comes with 512 KB of
onboard video memory allowing pixel resolutions of up to 1024 x 768 and
16 colors.
The SVGA controller supports analog VGA monitors (single and multiple
frequency, interlaced and noninterlaced) with a maximum vertical retrace
interlaced frequency of 87 Hz.
The buffer size of the onboard video memory can be increased from 512 KB
to 1 MB with one 40-pin 256 K x 16, 60 ns fast-page dynamic random access
memory (DRAM). 1 MB of DRAM will allow the controller to support
132-column text modes and high resolution graphics with 1280 x 1024 x 16
colors. Depending on the environment, the controller displays up to 64,000
colors in some video resolutions. It also provides hardware accelerated bit
block transfers (BITBLT) of data.