Register Descriptions Chapter 4
GPIB-1014 User Manual 4-66 © National Instruments Corporation
Configuration Register 2 (CFG2)
VMEbus Address: Base Address + 105 (hex)
Attributes: Write Only, Internal to DMAC
7 654 321 0
0 0 0 0 SFL SUP LMR SC
W
Configuration Register 2 (CFG2) is an 8-bit write-only register that is used to set the board
access mode, set the GPIB-1014 as System Controller, and drive the VMEbus SYSFAIL* line.
It also contains a Local Master Reset bit that can be used to reset the GPIB-1014 to a known
state.
Bit Mnemonic Description
7-4w 0 Reserved Bits
Write zeros to these bits.
3w SFL System Fail Bit
This board-specific bit is used to drive the VMEbus SYSFAIL* line
and to control the color of the LED on the board. On power-up, this
bit is cleared, the LED is red, and the board drives the SYSFAIL* line
active. Setting this bit to a 1 turns the LED green and releases the
SYSFAIL* line. This bit is not cleared by a Local Master Reset.
0 = LED red, SYSFAIL* is driven active
1 = LED green, SYSFAIL* is not driven active
2w SUP Supervisor Bit
The Supervisor bit is used to select Supervisor-Only or
Supervisor-and-User access to the board. A jumper is provided on the
board to automatically select the value of this bit after power-up (or a
system reset).
0 = Supervisor-and-User access to the board
1 = Supervisor-Only access to the board
The factory default setting of jumper W2 will set this bit to 1 after
power-up or reset.