User`s guide

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Chapter 2: System Processor Board Description
Video
The onboard, integrated Cirrus Logic CL-GD5480 64-bit VGA ASIC contains an SVGA
controller that is fully compatible with these video standards: CGA, EGA, Hercules
Graphics,MDA, and VGA. Thestandardsystemconfigurationcomes with 2MB of 10 ns
onboard video memory. The video controller supports pixel resolutions of up to
1600 x 1200 and up to 16.7 M colors.
The SVGA controller supports analog VGA monitors (single and multiple frequency,
interlaced andnoninterlaced) witha maximum vertical retrace noninterlacedfrequency
of 100 Hz.
You cannot add video memory to this system. Depending on the environment, the
controller displays up to 16.7 M colors in some video resolutions. It also provides
hardware-accelerated bit block transfers (BITBLT) of data.
SCSI Controller
The processor board includes two SCSI controllers. A narrow SCSI controller
(SYM53C810AE) is on the PCI-A bus, and a dual-channel wide LVD/SE (Ultra2/Ultra)
SCSI controller (SYM53C896) is on the PCI-B bus. The narrow provides support for the
legacy8-bitSCSIdevicesinthe5.25-inchdrivebays.ThewidedrivesoneSCSIbackplane
and provides support for external expansion.
Internally, each wide channel is identical, capable of operations using either 8- or 16-bit
SCSI providing 10 MB/sec (Fast-10) or 20 MB/sec (Fast-20) throughput, or 20 MB/sec
(Ultra), 40 MB/sec (Ultra-wide) or 80 MB/sec (40 Mhz) (Ultra-2).
TheSYM53C810AE(narrow)containsahigh-performanceSCSIcorecapableofFast8-bit
SCSI transfers in single-ended mode. It provides programmable active negation, PCI
zerowait-state burstsof faster than 110 MB/secat 33MHz, and SCSI transfer rates from
5 to 10 MB/sec. The narrow SCSI comes in a 100-pin rectangular plastic quad flat pack
(PQFP) and provides an “AND tree” structure for testing component connectivity.
The Sym53C896 (wide) contains a high-performance SCSI bus interface. It supports SE
mode with 8-bit (10 or 20 MB/sec) or 16-bit (20 or 40 MB/sec) transfers and LVD mode
with 8-bit(40 MB/sec) or 16-bit (80 MB/sec) transfers ina 329-pin ball grid array(BGA)
package.