System Controller Selection (J20); Remote Status And Control (J1) - Motorola MVME2700 Series Installation And Use Manual

System Controller Selection (J20)

The MVME2700 is factory-configured as a VMEbus system controller by
jumper header J20. If you select the "automatic" system controller
function by placing a jumper on J20 pins 2 and 3, the MVME2700
determines whether it is the system controller by its position on the bus. If
the board is in the first slot from the left, it configures itself as the system
controller. If the MVME2700 is not to be system controller under any
circumstances, place the jumper on J20 pins 1 and 2. When the board is
functioning as system controller, the
3
2
1
Not System Controller

Remote Status and Control (J1)

The MVME2700 front panel LEDs and switches are mounted on a
removable mezzanine board. Removing the LED mezzanine makes the
mezzanine connector (J1, a keyed, double-row 14-pin connector) available
for service as a remote status and control connector. In this application, J1
can be connected to a user-supplied external cable to carry the Reset and
Abort signals and the LED lines to a control panel located apart from the
MVME2700. Maximum cable length is 15 feet.
Table 4-1
http://www.motorola.com/computer/literature
J20
Auto System Controller
(factory configuration)
lists the pin numbers and signal mnemonics for J1.
MVME2700 Base Board Preparation
LED is turned on.
SCON
J20
3
2
1
System Controller
J20
3
2
1
1-11
1