XYCOM XVME-674 PC/AT VMEbus 486 CPU Processor Module

I. Brand and Product Positioning

Brand: XYCOM (belongs to Acromag Xembedded, an established VME industrial control platform in the United States)

Model: XVME-674, a standard 6U single-slot VME PC/AT compatible main control CPU board, x86 486 architecture, a mid-range industrial control controller between the old-fashioned 68K XVME-601 and Pentium XVME-655

Positioning: The main controller of the entire VME rack system, driving the entire XVME series of analog/digital I/O boards (XVME-500/4, XVME-505/1, XVME-540, XVME-085)

Life Cycle: The original factory has completely discontinued production. Only refurbished pieces from disassembly tests / a small number of new leftover goods are available. Widely used for the maintenance and replacement of old extrusion, wide-format printing, and heavy packaging production lines.

. Processor CPU

Two standard hardware versions:

Standard version: Intel 80486DX @ 33MHz

Enhanced version: Intel 80486DX2 @ 66MHz, with built-in hardware FPU floating-point operation unit

2. Memory classification models (suffixes distinguish capacity)

XVME-674/4: 4MB DRAM

XVME-674/16: 16MB DRAM

XVME-674/32: Maximum 32MB DRAM (top configuration)

3. On-board storage controller

Standard IDE hard disk controller (supports 2.5/3.5 inch industrial hard drives, SSD)

Floppy drive FDC controller (SA-450 interface old-fashioned floppy disk boot)

Fixed BIOS firmware, on-board lithium battery to preserve system clock and CMOS parameters

4. VME bus master control capability (IEEE 1014 standard)

Bus role: VME Master (host) + VME Slave (from) bidirectional mode

Address width: A32/A24/A16; Data width: D32/D16/D08

Interrupt system: Can generate / respond to VME IRQ1–IRQ7 seven-level hardware interrupts, local CPU can trigger any VME interrupt level

Bus arbitration, SYSCLK system clock, SYSRESET global reset complete driver circuits