1. General Description

2. Key Differences from MVME147‑010

• CPU/FPU: 25 MHz (010 = 16 MHz)

• Ethernet: Onboard AUI Ethernet (010 = No Ethernet)

• DRAM: 4 MB (same as 010, no parity)

3. Key Features

• Processor:

  • MC68030 @ 25 MHz (32‑bit, MMU, 256B cache)

  • MC68882 FPU @ 25 MHz (IEEE 754 floating‑point)

• Memory:

  • DRAM: 4 MB standard (no parity)

  • EPROM: 4 × 32‑pin sockets, up to 4 MB total (16‑bit wide)

  • SRAM: 4 KB battery‑backed (data retention)

  • RTC: Battery‑backed time‑of‑day clock/calendar

• Onboard I/O:

  • 4 × RS‑232‑D serial ports (Z8530 controller)

  • 1 × 8‑bit Centronics parallel printer port

  • 1 × SCSI interface (WD33C93, DMA capable)

  • 1 × AUI Ethernet (10 Mbps, external transceiver)

• VMEbus Interface:

  • Compliance: ANSI/VITA 1‑1994 VME64 (IEEE 1014)

  • Address: A16/A24/A32

  • Data: D08/D16/D32

  • Mode: Master + Slave

  • System controller: SYSCLK, arbiter, reset, BTO

• Timers & Control:

  • 2 × 16‑bit tick timers (periodic interrupts)

  • 1 × watchdog timer

  • 2 × software interrupts

• Status & Switches:

  • LEDs: SCON, RUN, FAIL, STATUS

  • Switches: RESET, ABORT; remote RESET connector

• Power Supply:

  • +5 VDC, ±12 VDC (VMEbus standard)

4. Technical Specifications

4.1 Processor / FPU

• CPU: MC68030 @ 25 MHz, 32‑bit, MMU, 256B cache

• FPU: MC68882 @ 25 MHz, IEEE 754 compatible

4.2 Memory

• DRAM: 4 MB, no parity, single‑cycle access

• EPROM: 4 MB max (4 sockets, 16‑bit)

• SRAM: 4 KB, battery‑backed

• RTC: Battery‑backed, Y2K compliant

4.3 I/O Interfaces

• Serial: 4 × RS‑232‑D (EIA‑232), Z8530

• Parallel: 1 × Centronics‑compatible (8‑bit)

• SCSI: 1 × asynchronous SCSI, WD33C93, DMA

• Ethernet: 1 × AUI 10 Mbps (external transceiver)

4.4 VMEbus

• Architecture: VME64 (A32/D32)

• Master/Slave: Full master + slave

• System controller: Yes (jumper selectable)

4.5 Electrical

• Voltage: +5 VDC, ±12 VDC

• Logic: 5 V TTL compatible

4.6 Mechanical

• Form Factor: 6U VME

• Size: 233 mm × 160 mm

• Mounting: Standard VME chassis slot

4.7 Environmental

• Operating Temp: 0 °C to +55 °C

• Storage Temp: ‑20 °C to +70 °C

• Humidity: 5%–95% RH, non‑condensing

4.8 OS Support

• VxWorks (legacy), Motorola VERSAdos, NetBSD/mvme68k, custom RTOS, bare‑metal

5. MVME147 Series Variations

• MVME147‑010: 16 MHz, 4 MB DRAM, no Ethernet, SCSI

• MVME147‑011: 25 MHz, 4 MB DRAM, Ethernet + SCSI

• MVME147‑012: 25 MHz, 8 MB DRAM, Ethernet + SCSI

• MVME147‑013: 25 MHz, 16 MB DRAM, Ethernet + SCSI