Xycom XVME-653, Manual

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XVME-653/658 Manual
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Architecture
This section describes the XVME-653/658 processor modules’ architecture.
CPU Chip
The XVME-653 supports the Intel 233 MHz Pentium MMX processor. The MMX proc-
essor features new instructions to improve multimedia performance. A dynamic branch
prediction unit, improved internal pipelines, and separate 16 KB data and instruction
caches further enhance performance.
The XVME-658 supports the AMD 333 MHz K6-2 processor with 3DNOW! Technol-
ogy. The AMD 333 MHz K6-2 processor incorporates the MMX instruction set as well
as the new 3DNOW! Technology instruction set which can increase the speed of float-
ing-point-intensive operations and 3D graphics. In addition, a 64 KB L1 cache, four x86
instructions decoders, a large branch prediction table, and six integer-execution units
further enhance performance.
Ethernet Controller
The XVME-653/658 contains a state-of-the-art Intel 82558 10/100 BaseTX Ethernet
controller with a 32-bit PCI bus mastering interface to support 100 Mbits per second bus
transfers. The RJ-45 connector on the module’s front panel provides autosensing for
10BaseT and 100BaseTX connections.
PCI Local Bus Interface
The PCI-to-ISA bridge device provides an accelerated PCI-to-ISA interface that includes
a high-performance enhanced IDE controller, PCI and ISA master/slave interfaces, en-
hanced DMA functions, and a plug-and-play port for onboard devices. The bridge device
also provides many common I/O functions found in ISA-based PC systems, including a
seven channel DMA controller, two 82C59 interrupt controllers, an 8254 timer/counter,
and control logic for NMI generation.
Video Controller
The PCI bus video controller features a 64-bit graphics engine, with 24-bit RAMDAC
for true color support. It has 2 MB of VRAM and supports resolutions up to 1280 x 1024
with 256K colors.
Fast IDE controller and Floppy Drive Controller
The enhanced IDE controller supports programmed I/O (PIO) and bus mastering DMA
with transfer rates to 22 MB/second. The controller contains an 8 x 32 bit buffer for bus
master IDE PCI burst transfers, and will support up to two IDE devices. This controller
can also handle a single optional floppy drive device. If present, this floppy drive will be
designated Drive A.