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CPU-5V
CPU-5V
CPU-5V

FORCE CPU-5V SPARC VMEbus Single Board Computer

  • Model: CPU-5V (SPARC CPU-5V)
  • Brand: Force Computers
  • Series: Force SPARC VMEbus Computing Platform
  • Core Function: Embedded VMEbus processing and system control
  • Product Type: CPU / Single Board Computer
  • Key Specs: SPARC architecture processor; VMEbus interface; UNIX and real-time OS support
  • ⚠️ Obsolete Model – Limited Stock Available
  • Condition: New Original / New Surplus / Tested Refurbished (availability dependent)
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Description

3. Key Technical Specifications

Parameter Value
Model Family CPU-5V
Manufacturer Force Computers
Product Type VMEbus Single Board Computer
Processor Architecture SPARC
Bus Interface VMEbus
Operating Systems Solaris, Real-Time OS, Proprietary Embedded OS
Form Factor VME Single Board Computer
System Integration VME Master/Slave Operation
Expansion Support Variant Dependent
Memory Configuration Variant Dependent
Network Support Configuration Dependent
Industrial Applications Factory Automation, Defense, Scientific Systems
Product Status Obsolete Legacy Hardware

The CPU-5V family was designed around the SPARC architecture and targeted demanding embedded applications including industrial control, military command systems, CAD/CAM, medical imaging, simulation systems, and high-performance data acquisition platforms.

 

4. Product Introduction

The Force Computers CPU-5V is a SPARC-based VMEbus single-board computer developed for embedded applications requiring UNIX-class processing performance within a VME architecture. Unlike simple controller cards, the CPU-5V functions as the primary processing engine for complex automation, defense, scientific, and telecommunications systems.

In field deployments, CPU-5V systems commonly appear in long-life OEM equipment where software certification and system validation costs make complete platform replacement impractical. Maintaining a working CPU-5V inventory often provides a lower-risk path than migrating to a modern architecture and requalifying the entire application stack.

CPU-5V
CPU-5V
CPU-5V
CPU-5V

 

5. Installation & Configuration Guide

Stage 1: Pre-Installation Preparation (10 Minutes)

⚠️ Safety First

  1. Notify operations personnel of planned downtime.
  2. Place equipment into a safe operating state.
  3. Apply Lock-Out/Tag-Out procedures.
  4. Remove all chassis power.
  5. Wait at least 5 minutes for power supply discharge.

Tools Required

  • ESD wrist strap
  • PH1 screwdriver
  • Fluke 115 multimeter
  • Wire labels
  • Smartphone camera
  • Flashlight

Data Backup

  1. Backup operating system images.
  2. Record:
    • IP addresses
    • Host names
    • Boot parameters
    • VME slot location
  3. Photograph:
    • Jumper settings
    • DIP switches
    • SBus or graphics daughtercards
    • Front-panel connections
  4. Document firmware revisions.

Stage 2: Removing the Old Module (5 Minutes)

  1. Remove retaining screws.
  2. Label all network and serial cables.
  3. Disconnect transition-module connections.
  4. Release ejector handles.
  5. Pull the board straight outward.

⚠️ Never angle the board during extraction. VME connector damage is one of the most common causes of intermittent bus faults.

  1. Inspect:
    • P1 connector
    • P2 connector
    • Backplane contacts
    • Guide rails

⚠️ Keep the original board available until commissioning is complete.

Stage 3: Installing the New Module (5 Minutes)

Configuration Clone (Critical)

  1. Connect ESD protection.
  2. Verify:
    • CPU-5V model designation
    • Assembly number
    • Hardware revision
  3. Duplicate all switch and jumper settings.

❗ This is the most common rookie mistake, but it happens constantly. Take a picture before you pull it. I can’t stress this enough.

  1. Insert the board into the VME guides.
  2. Seat the connectors fully.
  3. Secure the retaining hardware.
  4. Reconnect all communications interfaces.

Self-Checklist

  • Model numbers match
  • Jumpers duplicated
  • Firmware documented
  • Connectors seated
  • Slot location verified

Stage 4: Power-On & Testing (10 Minutes)

Pre-Power Check

  1. Verify chassis grounding.
  2. Check power rails for shorts.
  3. Confirm cooling airflow paths are unobstructed.

Power-Up Procedure

  1. Energize the VME chassis.
  2. Observe startup LEDs.
  3. Connect to the console port.
  4. Verify boot monitor startup.
  5. Verify Ethernet connectivity.
  6. Confirm operating system boot sequence.
  7. Test VME communication.

Functional Testing

  1. Verify CPU operation.
  2. Verify memory detection.
  3. Verify network communications.
  4. Verify VME transactions.
  5. Execute application-level diagnostics.

⚠️ Troubleshooting Note:

  • No console output often indicates firmware or NVRAM issues.
  • Continuous reboot cycles may indicate corrupted boot parameters.
  • VME communication failures frequently result from slot-assignment errors.

Technical Pitfall & Survival Guide

❗ Firmware Revision Mismatch

I’ve seen projects lose an entire weekend because a replacement CPU-5V board carried a different firmware revision than the production system.

The hardware looked identical. The boot process wasn’t.

Avoidance:

  • Record firmware versions before removal.
  • Request matching firmware revisions.
  • Verify boot monitor compatibility.

❗ NVRAM Configuration Loss

Many SPARC-based systems store critical boot information in NVRAM.

A dead battery can prevent normal startup.

Avoidance:

  • Backup boot parameters.
  • Record environment settings.
  • Verify battery condition.

❗ Graphics and Daughtercard Differences

Certain CPU-5V variants include graphics or SBus expansion hardware.

I’ve seen engineers replace the CPU board and forget the attached daughtercard entirely.

Avoidance:

  • Photograph the complete assembly.
  • Verify installed options.
  • Match hardware configurations exactly.

❗ Power Supply Margin Issues

SPARC processor boards typically draw more power than older 68000-based platforms.

A marginal power supply may pass startup tests but fail under load.

Avoidance:

  • Measure power rails under load.
  • Maintain a 20% power reserve.
  • Verify fan operation.

❗ Electrostatic Discharge (ESD)

I once watched an engineer unpack a replacement SPARC board directly from a shipping carton without grounding himself.

The board booted once and never completed POST again.

Avoidance:

  • Wear a grounded wrist strap.
  • Use an ESD mat.
  • Store boards in anti-static packaging.

Keep these checks in mind and you’ll save yourself 90% of typical rework time.

 

6. Frequently Asked Questions (FAQ)

Q1. What is the FORCE CPU-5V?

The CPU-5V is a SPARC-based VMEbus single-board computer developed by Force Computers for industrial, military, telecommunications, and scientific computing applications.

Q2. Is the CPU-5V obsolete?

Yes.

The platform belongs to a legacy generation of Force Computers VME hardware and has been out of production for many years. Most available inventory comes from surplus stock or refurbished equipment.

Q3. Can I hot-swap the CPU-5V?

No.

Most VME installations using CPU-5V boards were not designed for hot insertion. Power down the chassis before installation or removal.

Q4. What operating systems are commonly used with CPU-5V boards?

Typical deployments include:

  • Solaris
  • VxWorks
  • LynxOS
  • Proprietary real-time operating systems
  • OEM UNIX-based applications

Actual compatibility depends on the exact board revision and installed firmware.

Q5. Why do identical-looking CPU-5V boards sometimes fail to boot in existing systems?

Firmware and hardware options often differ between revisions.

I’ve seen two boards with nearly identical labels behave completely differently because one contained a different boot monitor revision.

Q6. Why is the CPU-5V still purchased today?

Many industrial and defense systems remain certified around the original hardware platform. Replacing a failed CPU board is often significantly less expensive than rewriting software and recertifying the complete system.

Q7. What should I verify before ordering?

At minimum, verify:

  • Exact CPU-5V assembly number
  • Hardware revision
  • Firmware revision
  • Memory configuration
  • Installed daughtercards
  • Operating system version
  • VME chassis compatibility

Without these details, ordering the wrong replacement is surprisingly easy.

 

Quality Control & Verification Process

1. Inbound Inspection & Traceability

  • Verify OEM labels and assembly numbers.
  • Confirm serial-number traceability.
  • Inspect for:
    • Corrosion
    • Connector wear
    • Rework marks
    • UV yellowing
  • Audit included accessories.

2. Live Functional Testing

  • Install in a known-good VME chassis.
  • Verify boot monitor operation.
  • Verify console access.
  • Test network communication.
  • Verify VMEbus transactions.
  • Run continuous operation for more than 24 hours.
  • Generate an official test report.

3. Electrical Parameter Testing

  • 500 V insulation resistance test (>10 MΩ target).
  • Ground continuity verification.
  • Power rail measurements.
  • Connector integrity inspection.

4. Firmware & Configuration Verification

  • Record firmware revision.
  • Photograph jumper positions.
  • Document NVRAM settings.
  • Archive configuration records.

5. Final QC & Packaging

  • QC inspector sign-off.
  • Anti-static ESD bagging.
  • Bubble-wrap protection.
  • Heavy-duty corrugated carton.
  • QC Passed label with inspection date.

For legacy SPARC VME hardware, test photos, console screenshots, burn-in logs, and startup videos should be available upon request. The goal is not to promise failure-free operation; it is to verify that the CPU-5V functions correctly under controlled load testing before shipment.

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