Dual Pentium VMEbus CPU Board With Symmetric Multiprocessing Capability

General Micro Systems, Inc.ro Systems, Inc. has announced the V255, the first dual-Pentium embedded VMEbus CPU board with symmetrical multiprocessing (SMP) capability. Featuring 512k bytes of L2 cache, 256 Mbytes of L2 cache, and 64-bitBLT graphics, the V255 also provides two 10/100Base-T Ethernet ports, an Ultra Wide SCSI interface, and a pair of PMC expansion ports.

The V255 is the first multiprocessor VMEbus CPU board to leverage the symmetric multiprocessing facilities built into Windows NT. The V255 is also the first VMEbus CPU board to utilize the complete Intel Embedded Chip Set.

The V255 is implemented as two 6U VME boards (a CPU module and an I/O baseboard), which are connected via a local PCI bus. The CPU module provides two 233-MHz Pentium Processors with MMX support, 512 Kbytes of synchronous burst L2 cache, up to 256 Mbytes of parity DRAM main memory, and two PMC expansion slots. The two PMC slots sit on the V255's primary PCI Bus, which boosts I/O throughput relative to conventional PMC implementations, which access the CPU via a secondary PCI bus.

The V255's I/O baseboard provides two Ethernet controllers, which can operate at either 10 Mbps or 100 Mbps with autosensing capability, a 64-bitBLT graphics engine with 4 Mbytes of memory that supports resolutions of up to 1280 x 1024 in 65,000 colors, and an Ultra Wide SCSI interface. The I/O module provides a VME64 interface. Based on the Tundra Universe II chip, the VME64 interface provides full system controller functions, 64-bit DMA, mailbox interrupts, and location monitors. The I/O module supports a variety of ISA Bus I/O devices (via the VMEbus P2 connector), including keyboard, mouse, two IDE channels, two serial ports, a printer port, and dual USB ports.

The V255 can be booted from a hard drive, floppy, CD ROM, LS120 Super Floppies, Disk-On-Chip or user flash. The V255 also provides 72 Mbytes of Disk-On-Chip flash memory, which emulates a hard drive and enables the board to be used in diskless industrial environments.

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