Motorola MVME166IG/D2 - Manual (Page 40)

Hardware Preparation and Installation
2-4 MVME166 Single Board Computer Installation Guide
2
General Purpose Readable Jumpers on Header J3
Each MVME166 may be configured with readable jumpers. These jumpers can
be read as a register (at $FFF40088) in the VMEchip2 LCSR. The bit values are
read as a one when the jumper is off, and as a zero when the jumper is on.
System Controller Header J6
The MVME166 can operate as VMEbus system controller. The system
controller function is enabled/disabled by jumpers on header J6. When the
MVME166 is functioning as system controller, the SCON LED is turned on.
The VMEchip2 can be configured as a system controller as follows.
15
GPIO0
GPIO1
GPIO2
GPIO6
GPIO3
GPIO4
GPIO5
1 2
16 GPIO7
All Zeros
7 8
J3
IN = Normal Debugger
OUT = BootBug
(Factory Configuration)
System Controller
J6
1
2
Not System Controller
(Factory Configuration)
J6
1
2