Description
Key Technical Specifications
- Product Model: VMIVME-7750-734001350
- Manufacturer: GE Fanuc / Abaco Systems
- Processor: Intel Pentium III @ 1.26 GHz
- Chipset: Intel 815E
- Memory: 512MB PC133 SDRAM (SODIMM)
- Storage: 1GB CompactFlash (Bootable)
- Graphics: SVGA with 4MB DRAM Cache
- Bus Standard: VME64 (Rev C.1) with PCI-to-VME Bridge
- Network: Dual 10/100Base-T Ethernet
- Expansion: 1x PMC Slot (5V)
- I/O: 2x RS-232 Serial, GPIO
- Power: +5V / +12V / -12V VME Rails
Product Introduction
You’re staring at a VME rack in a power plant, and the old Motorola 68k CPU finally gave up. The GE VMIVME-7750-734001350 is your migration path—a single-slot Pentium III powerhouse that drops right into that VME64 backplane without changing the chassis. It’s not just a CPU; it’s a full PC-on-a-board with 512MB RAM and dual Ethernet, letting you run modern RTOS or even stripped-down Linux on hardware that still talks to your legacy I/O cards.
Bottom line—this board bridges the gap between 1990s VME and 2000s performance. The GE VMIVME-7750-734001350 uses a transparent PCI-to-VME bridge, so your old VME slaves don’t know they’re talking to a 1.26GHz x86 chip instead of a 20MHz 68040. Honestly, finding the exact -734001350 revision is tough since GE/Abaco stopped making these, but as a drop-in upgrade for 7750-based systems, it’s still cheaper than re-engineering the entire backplane.
Troubleshooting Quick Reference
| Fault | Cause | Relevancy | Quick Check | Fix |
|---|---|---|---|---|
| No POST | Bad SODIMM | 85% chance | Reseat/swap RAM | Test with known-good PC133 stick |
| VME Timeout | Bridge Config | 75% chance | Check Jumper J6 | Verify System Controller vs. Peripheral |
| Boot Loop | Corrupt CF | 70% chance | Swap CompactFlash | Re-image from backup or vendor |
| No Network | Driver Mismatch | 60% chance | Check OS Device Mgr | Install Intel 82559 driver |
| Overheat | Fan Failure | 50% chance | Check airflow | Clean heatsink or replace fan |
Application Scenarios & Pain Points
- Power Generation Control: Turbine control systems running VxWorks on 68k CPUs are hitting end-of-life. The GE VMIVME-7750-734001350 allows a “lift-and-shift” migration to Pentium III, keeping the same VME I/O cards but gaining 50x the compute for new predictive maintenance algorithms. Pain? Validating the VME bridge timing with old analog I/O.
- Rail Signaling: Legacy interlocking systems need more RAM for new safety logic. The GE VMIVME-7750-734001350’s 512MB SDRAM is a massive jump from the 32MB standard on older boards, but you have to ensure the OS supports >256MB in VME space.
- Test & Measurement: Automated test equipment (ATE) racks need faster data logging. The GE VMIVME-7750-734001350’s dual Ethernet lets you stream data to a historian while keeping the VME bus free for instrument control. The pain? Thermal management in sealed 6U enclosures.
Real-World Case Study: Engineer at a nuclear substation faced a CPU failure on a 1998 protection relay tester. Original 68060 board was unobtainium. Swapped in a , recompiled the VxWorks BSP with the new PCI-VME bridge driver, and had the system back online in 4 hours. Saved a $250k rack replacement.
GE VMIVME-7750-734001350-027750-734001 G VMIVME-7750
Compatible Replacement Models
- ✅ Drop-in Replacement: (Surplus). Exact match. Verify the -027750 suffix matches your BOM; minor revisions can change jumper maps. Cost: 1,200–2,500 surplus.
- ⚠️ Software Compatible: VMIVME-7750-746000. Same form factor, different BOM revision. Requires BSP re-validation and potential jumper changes. Labor: 1–2 weeks for qualification.
- ❌ Hardware Incompatible: VMIVME-7807 (PowerPC). Same VME slot, but completely different architecture, boot process, and driver stack. Do not attempt to swap without full system redesign. Requires new OS, new drivers, and full re-certification.
