Xycom XVME-654, Manual

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Chapter 1 – Introduction
The XVME-654 PC/AT
®
-compatible VMEbus processor module is designed to combine
the high performance and ruggedized packaging of the VMEbus with the broad
application software base of the IBM PC/AT standard.
Module Features
The XVME-654 offers the following features:
•
133 MHz AM5x86™ CPU
•
4 to 32 Mbytes fast-page EDO DRAM
•
PCI local bus
•
PCI local bus SVGA controller, 1024 x 768
•
PCI enhanced IDE controller
•
PCI to VMEbus interface
•
Two 16550-compatible serial ports
•
Centronics-compatible parallel port
•
Optional PCI and PC/AT expansion
•
On-board PCI Ethernet controller with 10BaseT and 10Base2 interfaces
•
One floppy drive with a SA-450 interface
Architecture
This section describes the architecture of the XVME-654 processor module.
CPU Chip
The XVME-654 incorporates an AM5x86 processor. The CPU runs clock quadrupled at
133 MHz with a 33 MHz external bus. A unified 16 Kbyte cache using write-back
technology minimizes the time the CPU core must spend waiting for data or instructions,
accelerating business and multimedia applications.
PCI Local Bus Interface
The ALI chipset provides an accelerated PCI-to-ISA interface that includes a high-
performance enhanced IDE controller, PCI and ISA master/slave interfaces, and plug-
and-play port for on-board devices. The chipset 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.
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