Specifications

8.7 Status & Control Register 3 (I/O address 217h)
765 43 2 1 0
|________|________|_________|________|_________|_________|_________|_________|
||| || | | |
MODE VME GAP VID4 VID3 VID2 VID1 VID0
JUMPER SYSTEM
RESET
ENABLE
Bits4-0:VME64x slot number (Read Only)
These bits indicate the state of the VME Geographic Address pins (GA4-GA0) of the VME P1
connector. They will read as ‘1’ if the board is installed in a backplane which does not support
these signals.
Bit 5: VME64x slot number parity (Read Only)
These bits indicate the state of the VME Geographic Address parity pin (GAP) of the VME P1
connector. It will read as ‘1’ if the board is installed in a backplane which does not support this
signal.
Bit 6: VME System Reset Enable (Read Only)
This bit controls the SYSRST# input from the VME Bus.
0 = System Reset is disabled (default)
1 = System Reset is enabled
Bit 7: Mode Switch (Read Only)
This bit is used to select the operating mode for the board firmware as determined by the setting
of the MODE switch (see Section 9.1). See Chapter 9 for more information about the BIOS
operating mode, and Chapters 10 and 11 for further details of the VSA operating mode.
0 = BIOS mode
1 = VSA mode
VP 110/01x 8-13
Additional Local I/O Functions