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Key Technical Specifications
- Processor: Motorola 68K-series CPU
- Bus Interface: VMEbus (IEEE 1014 compatible)
- Memory: 512 KB DRAM (hardware refresh 15 μs), 4 EPROM sockets (256 KB space)
- Serial Ports: 3 RS232-compatible serial communication ports
- Parallel I/O: Parallel interface to P2 connector
- Timer: 24-bit timer with 5-bit prescaler
- Real-Time Clock: On-board battery-backed RTC
- Interrupts: Local interrupt service via auto-vectoring
- Control Switches: RESET and ABORT function switches
- Form Factor: Double Eurocard, VME plug-in card
- Lam Research Part No.: 17035-1-B-65623
- Part No.: 300000
Product Introduction
FORCE SYS68K-SASI-1 is a Force Computers single-board computer (SBC) built on the SYS68K VMEbus platform, used in Lam Research semiconductor processing equipment. It uses a Motorola 68K-series CPU, provides 512 KB DRAM, 4 EPROM sockets, 3 serial ports, and parallel I/O for embedded control in cleanroom automation.
This board is typically chosen for replacement in legacy Lam 1700/1800 series equipment where exact hardware match and bus behavior are critical. Stock is limited to discontinued/surplus channels, and most listings are used or pre-owned (some untested). Verify the exact revision and firmware before ordering.
- SYS68K-SASI-1
- SYS68K-SASI-1
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No boot activity at power-up | Missing backplane power, failed board, or bad VME slot | ✅ High | Measure rack supply rails and check board LEDs/status before swap | Verify 5 V and backplane seating first |
| Boot hangs early or resets | CPU fault, memory fault, or firmware error | ✅ High | Observe reset behavior and any status LEDs; try known-good slot | Treat as likely board-level failure |
| Serial ports unresponsive | Wiring issue, baud mismatch, or port hardware fault | ✅ Medium | Check cabling and terminal settings; run loopback test | Fix external side first, then suspect board |
| Intermittent crashes | Thermal issue, aging DRAM, or unstable power | ✅ High | Monitor board temperature and test with stable rack power | Consider board replacement if instability persists |
| VME bus errors | Slot contact issue, backplane fault, or address conflict | ✅ High | Reseat board, inspect edge connector, verify address map | Check rack integrity and jumper/strap settings |
Contact technical support with photos of the board, connectors, LEDs, and any console or diagnostic logs if the fault is unclear.
Frequently Asked Questions (FAQ)
Q: Is the SYS68K-SASI-1 still in production?A: No. It is an obsolete Force Computers part, discontinued by the manufacturer. Supply is limited to surplus, used, or untested pre-owned stock.
Q: Can I use this as a direct replacement for another SYS68K SBC in Lam equipment?A: Only if the CPU type, memory size, I/O map, revision, and firmware match your installed system. Verify the exact Lam part number (17035-1-B-65623) before ordering.
Q: Is it hot-swappable?A: No. Power down the rack before removal. Pulling a VME board live can damage the board or the backplane.
Q: Will my existing configuration survive a swap?A: Not guaranteed. If your system stores configuration or boot parameters on the board or in VMEPROM, back them up first and match jumpers/straps on the replacement.
Q: What condition should I expect?A: Most stock is used or pre-owned. Some sellers offer parts as-is without warranty or returns. Confirm whether the listing is tested or untested before purchase.
Q: Why is this board expensive/limited?A: It is legacy hardware for semiconductor equipment with no factory support and limited availability. The price reflects age, scarcity, and niche application.
Q: What should I check before installing a replacement SYS68K-SASI-1?A: Match the revision, inspect the edge connector, verify backplane power, and photograph every jumper/strap on the original board before removal.
