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 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

• 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).