The Emerson/Motorola MVME147SA-1 is a single-height 6U VME processor module built around the Motorola MC68030 CPU running at 25 MHz, paired with an MC68882 floating-point coprocessor at 25 MHz. This VME64-compliant board delivers 32-bit data path processing with up to 32-bit addressing capability, 8 MB of dual-ported parity DRAM, and 2 KB of NVRAM with real-time clock functionality. It integrates Ethernet (10 Mb), narrow SE SCSI, four asynchronous serial channels, an 8-bit bidirectional parallel port, and block transfer support via the VMEchip ASIC, which can serve as system controller with global timeout, arbitration, and interrupt acknowledge daisy-chaining. The board measures 233.4 mm (H) × 160.0 mm (D) × 19.8 mm (W) and supports multiple operating systems including VxWorks, LynxOS, pSOS+, OS-9, and BSD variants.
## Technical Specifications
**Processor & Memory**
• CPU: Motorola MC68030 at 25 MHz
• FPU: Motorola MC68882 at 25 MHz
• RAM: 8 MB DRAM with parity
• NVRAM: 2 KB SRAM or MK48T02 with clock
• ROM: Four 32-pin JEDEC sockets for 1M × 8 EPROMs
**VMEbus Architecture**
• Standard: VMEbus ANSI/VITA 1-1994 VME64 (IEEE STD 1014)
• Data path: 32-bit
• Addressing: Up to 32-bit range
• Master/Slave configuration with asynchronous variable-speed handshaking
• Block transfer protocol supported
• System Controller capable with global timeout timer, SYSCLK driver, Arbiter, IACK daisy-chain
**Connectivity**
• Ethernet: 10 Mb via AMD AM7990 Lance and Intel LXT901 SIA
• SCSI: Narrow SE via WD33C93B controller with firmware jump table
• Serial: Four asynchronous channels (8530 controller)
• Parallel: 8-bit bidirectional (PCC ASIC)
• P1 VME-I/O connector and P2-VME external I/O connector
## Key Features
• VMEchip ASIC for integrated bus control and system management
• Programmable Channel Controller (PCC) for parallel I/O and peripheral control
• General Control Chip (GCC) for on-board functions
• Status monitoring via four LEDs (FAIL, STAT, RUN, SCON)
## Operating System Support
OpenBSD/mvme68k, NetBSD/mvme68k, Motorola System V/68 (releases 3–8), pSOS+, LynxOS, OS-9, VRTX-32, VxWorks
## Typical Applications
Real-time control, industrial data acquisition, embedded VME-based systems requiring multi-protocol connectivity and deterministic processing.
