Vme Scon Select Header (J27); Pci Bus 1.0 Speed Header (J29) - Motorola MVME5500 Installation And Use Manual

VME SCON Select Header (J27)

A 3-pin planar header allows the choice for auto/enable/disable SCON
VME configuration. A jumper installed across pins 1-2 configures for
SCON disabled. A jumper installed across pins 2-3 configures for auto
SCON. No jumper installed configures for SCON always enabled.

PCI Bus 1.0 Speed Header (J29)

A 2-pin planar header that can force PCI bus 1.0 to run at 33 MHz rather
than the standard method of allowing the PMC board to control whether
the bus runs at 33 MHz or 66 MHz. No jumper installed allows the PMC
board to choose the PCI 1.0 bus speed. A jumper installed across pins 1-2
forces PCI bus 1.0 to run at 33 MHz.
http://www.motorola.com/computer/literature
J27
1
2
3
Always SCON
J29
1
2
PMC board controls
PCI 1.0 bus speed
(factory configuration)
VME SCON Select Header (J27)
J27
1
2
3
No SCON
(factory configuration)
J29
1
2
Force PCI bus 1.0
to run at 33 MHz
J27
1
2
3
Auto-SCON
1-15
1