Abaco Systems / VMIC VMIVME-7750-540 Pentium III Processor-Based VME Single Board Computer

The Abaco Systems / VMIC VMIVME-7750-540 is a 6U VME single-board computer built on the Intel 815E chipset with a Pentium III processor. It delivers high-performance computing for industrial real-time control, data acquisition, and embedded system applications requiring stable, deterministic operation. The board operates as either a VMEbus system controller or peripheral CPU, supporting full dual-ported memory access and transparent PCI-to-VME bridging.

– Technical Specifications

Processor:
• Intel Pentium III at up to 1.26 GHz
• 512 Kbyte Level 2 Advanced Transfer Cache (on-die, full-speed)
• Superscalar architecture: up to 3 instructions per clock cycle
• Dynamic branch prediction; MMX technology supported
• 64-bit data bus, 32-bit addressing

Memory:
• PC133 SDRAM (single 144-pin SODIMM, up to 512 Mbyte)
• 32 Kbyte nonvolatile SRAM (contents preserved during +5V power loss)
• Dual-ported DRAM to VMEbus for concurrent processor and VMEbus master access

System Bus & Chipset:
• 133 MHz system bus rate
• Intel 815E chipset with Advanced Hub Architecture (AHA)

VMEbus Interface:
• VME Specification Rev. C.1 compliant
• Transparent PCI-to-VME bridge
• System controller (slot 1) or peripheral CPU operation
• Programmable arbitration timeout (16 or 256 µs)
• DTB master/slave support: BLT32/BLT64, A32/D32, A24/D32, A16/D32
• Four 32-bit mailboxes for interprocessor communication with interrupt capability
• Arbiter modes: SGL, PRI, RRS
• Programmable interrupt generation (IRQ7* to IRQ1*)

Expansion & Form Factor:
• Single PMC slot (IEEE P1386, 5V PCI Mezzanine Cards)
• 6U Eurocard form factor

– Key Features

• SYSCLK driver and IACK* daisy-chain driver
• VMEbus access timeout timer
• Full Pentium III instruction set with superscalar execution
• Flexible operating system support

– Typical Applications

Real-time control systems, high-speed data acquisition, embedded signal processing, and distributed VME-based industrial computing platforms.

– Compatibility & Integration

Operates as transparent VME master and slave with full interrupt handling; supports standard VME requester programming (BR3* to BR0*, ROR, RWD, BCAP).