VMIC VMIVME-7487 Single Board Computer

Module Feature

VMIVME-7487 is a single-slot 6U VMEbus single board computer developed by VMIC (GE Fanuc / Abaco Systems),built around Intel 486 PC/AT architecture processor with integrated cache memory. It is equipped with dual-port shared memory for high-speed inter-processor communication between local CPU and VME bus master/slave nodes. Onboard PC/104 expansion connector allows stacking of additional PC/104 peripheral modules without occupying extra VME slots. VME bus supports full master and slave operation,32-bit data transfer with automatic byte/word swapping,complete address modifier programming and VME interrupt handling. Front panel integrates standard PC/AT peripherals:serial port,parallel printer port,PS/2 keyboard and mouse interface,hard disk activity LED. Built-in mailbox semaphore registers support inter-CPU message exchange and resource locking. Power-on BIT self-test executes memory,register and peripheral loopback checks to report hardware faults. Rugged Eurocard PCB with conformal coating,shock and vibration screened for power plant cabinet environment,widely used in legacy gas/steam turbine VME control system,aerospace ground test bench and retrofitted hardware-in-loop simulation VME chassis.

Working principle

Intel 486 CPU runs real-time operating system and user control applications. As VME bus master,the board issues bus commands to read/write all VME slave I/O modules installed on backplane. Dual-port memory can be accessed simultaneously by local CPU and remote VME host,realizing low latency inter-board data sharing. PC/104 expansion bus extends additional I/O peripherals stacked on top of the SBC. Mailbox semaphore registers manage multi-CPU synchronization and message passing. BIT diagnostic runs automatically during power-up,verifies RAM,register bank and peripheral interfaces and reports fault status via status registers. VME FPGA performs VME bus arbitration,address decoding and byte swapping for 32-bit data transfer. Onboard ESD and surge protection safeguard front panel I/O circuits.

Onboard components

Intel 486 processor with cache,memory controller,dual-port DRAM bank,PC/104 expansion interface,serial & parallel I/O controller,mailbox semaphore register array,BIT power-on self-test logic,VME J1/J2 edge connector,front-panel multi-port I/O connector,hard disk activity LED.

LED indicators

Front panel LED indicators for hard disk activity.

Hardware self-diagnosis

Visual inspection of PCB,components and solder joints;board ID register readback verification;RAM full read/write test;dual-port memory access verification;VME master/slave bus communication test.

Programming software

VMIC SBC BSP package and driver library,supports VxWorks,Linux and QNX real-time operating systems;BSP includes VME bus driver,dual-port memory API and PC/104 peripheral support.

Electrical & Process Parameters

Model: VMIVME-7487 Brand: VMIC Device type: 6U VMEbus 486 PC/AT single board computer module Bus standard: VMEbus,32 bit data transfer,master / slave operation,programmable address modifier,VME interrupt support Processor: Intel 486 Expansion: PC/104 stackable peripheral connector Inter-processor: Dual-port memory,mailbox semaphore registers Front I/O: RS232 serial,parallel port,PS/2 keyboard & mouse Control mode: VME master/slave,dual-port shared memory,PC/104 expansion,BIT power-on self-test,ESD protection Power supply: +5 V, +12 V, -12 V from VME backplane Cooling: Forced air cooling Protection: ESD protection,overvoltage clamping Mounting: Standard single-height 6U VME front panel ejector locking Protection class: PCB with optional conformal coating

Mechanical & Structure

Mounting: Single-slot 6U VME Eurocard Protection class: PCB with optional conformal coating

Environmental

Operating temperature:0℃ ~ +55℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:20~80% non-condensing Certification: CE compliant Status: VMIC 6U VME 486 single board computer with dual-port memory

Installation

Follow ESD safety procedure before handling.Fully power off VME chassis.Insert VMIVME-7487 into vacant 6U VME slot and lock front panel ejector latches.Stack PC/104 modules if required,connect keyboard,serial and parallel cables to front panel I/O ports.Power on chassis,load corresponding BSP and run BIT diagnostic before commissioning.

Interface

VME J1/J2 backplane connector,front-panel multi I/O connector,PC/104 expansion pins,fault status register pins.

Diagnostic

Board undetected: poor VME backplane contact,damaged edge connector or VME arbitration misconfiguration. Dual-port memory access failure: memory chip fault or bus timing mismatch. PC/104 peripheral no response: stack connector poor contact or incompatible peripheral module. BIT memory test fail: defective RAM chip or memory timing error.

Product Brief

VMIC VMIVME-7487 single height 6U VME single board computer,Intel 486 CPU with dual-port shared memory and PC/104 expansion,works as legacy VME chassis main controller for turbine control and aerospace hardware-in-loop simulation real-time systems.