This is a mirror of the vanished website, with permission of its author Paul Weissmann. It is here to be preserved. Brought to you by logo

Motorola Series 900


The Series 900 were very nice, stylish looking, stackable m88k-based computer systems. They were available in a lot of different configurations based on different MVME boards, including:

It is very well possible to use a different MVME board as the CPU, e.g. a MVME197SP.

The basic configuration consisted of two modules:

  1. The lower module housed the power supply and the actual VME-cage with four 6U-slots. Installed VME cards consisted of the CPU-board (see above), an I/O-board (not a P2-board!) and in most cases also a multi-port serial board.
    The I/O-board contains the following I/O-ports (from left to right):
    • HD68 SCSI, although this is a wide-SCSI-connector, only narrow-SCSI is perfomed with the existing MVME88k boards (they only have narrow-capable SCSI-controllers).
    • CONTROL, RJ45-port, connects to the SCSI-enclosure.
    • SP4/UPS, serial RJ45-port, to connect to an UPS.
    • SP3, serial RJ45-port.
    • SP2/TEL, serial RJ45-port, to connect to a modem.
    • CONSOLE, serial RJ45-port, to connect a serial console (pinout see Reference 1 below).
    • 10 BASE T, RJ45-port for an Ethernet connection.
    • ETHERNET, AUI-port for an Ethernet connection.
  2. The upper module housed the bays for two 5.25" SE- SCSI removable media drives and two 3.5" SCSI harddrives in special trays.

More VME and drive-modules can be stacked onto the system to provide more VME-slots and more room for drives.

Operating Systems


  1. Pinout for the RJ45 serial port to connect to a "standard" DB25 serial connector. Taken from an USENET post from Martin Etteldorf.

↑ up

← Back to Computers