Acromag / Xembedded / Xycom XVME-674 VMEbus PC/AT Processor Module

The Acromag/Xembedded/Xycom XVME-674 is a single-slot VMEbus processor module that delivers PC/AT compatibility within industrial VMEbus environments. It integrates either an Intel 80486DX at 33 MHz or an Intel 80486DX2 at 66 MHz CPU, providing computational performance for demanding embedded control and data processing applications.

Technical Specifications

• Intel 80486DX at 33 MHz


• Intel 80486DX2 at 66 MHz Memory


• DRAM up to 32 MB


• Available configurations: 4 MB, 16 MB, or 32 MB Storage & Graphics


• IDE Hard Disk Controller


• Floppy Disk Controller


• VGA Graphics Controller I/O Interfaces


• 2 Serial Ports


• 1 Parallel Port Environmental


• Storage Temperature: −55°C to +85°C


• Relative Humidity: 5% to 95% at 60°C, non-condensing

Key Features VMEbus Integration The module functions as a DTB slave with full A24/A16:D16/D08(EO) address and data width support. Read-Modify-Write cycles are supported. The on-board VMEbus Interrupter Circuit enables the local CPU to generate VMEbus interrupts across all seven interrupt levels (I1–I7) with programmable request levels. Hardware round-robin interrupt handling supports D16/D08(O) operation. PC/AT Compatibility Full PC/AT instruction set and peripheral compatibility allows deployment of standard PC-based software and drivers in VMEbus slot configurations, eliminating porting overhead for legacy applications.

Typical Applications

• Industrial control systems requiring VMEbus integration


• Data acquisition and real-time processing in harsh environments


• Embedded computing with extended temperature operation


• Systems requiring mixed-criticality workloads across VMEbus backplanes

Compatibility & Integration The XVME-674 integrates into VMEbus crate architectures as a processor controller or standalone compute element. PC/AT compatibility ensures broad software ecosystem access while VMEbus compliance - including interrupt generation, slave addressing, and data transfer protocols - maintains interoperability with existing industrial I/O modules and master controllers.