Filter
Top Products
Chapter 5 Programming Considerations
© National Instruments Corporation 5-37 VXI-MXI User Manual
The RM performs the following steps:
1. Scans logical addresses (0 to FF) and identifies all devices in VXIbus Mainframe #1. Finds
the VXI-MXIs at logical addresses 2 and 4 and moves DC devices to the lowest unused
logical addresses (for example, 1, 3, 5, 6).
2. Enables the logical address window of the VXI-MXI found at logical address 2 for the entire
outward mapping range of 0 to FF. Scans all logical addresses, skipping all previously
encountered devices, and finds the VXI-MXI in VXIbus Mainframe #3, the VXI-MXI in
VXIbus Mainframe #2, MXIbus Device A, and MXIbus Device B.
3. Enables the logical address window of the VXI-MXI in VXIbus Mainframe #3 for the entire
inward mapping range of 0 to FF. Scans all logical addresses, skipping all previously
encountered devices, and finds the VXI-MXI at logical address 82. Finds the Slot 0 device
and uses it to move all DC devices in VXIbus Mainframe #3 to the lowest unused logical
addresses (for example, 81, 83, 84, 85).
4. Enables the logical address window of the VXI-MXI found at logical address 82 for the
entire outward mapping range of 0 to FF. Scans all logical addresses, skipping all
previously encountered devices, and finds the VXI-MXI in VXIbus Mainframe #4 and the
VXI-MXI in VXIbus Mainframe #5.
5. Enables the logical address window of the VXI-MXI in VXIbus Mainframe #4 for the entire
inward mapping range of 0 to FF. Scans all logical addresses, skipping all previously
encountered devices. Finds the Slot 0 device and uses it to move all DC devices in VXIbus
Mainframe #4 to the lowest unused logical addresses. No more VXI-MXI interfaces are
found. The RM enables the logical address window for the VXI-MXI in VXIbus Mainframe
#4 with an inward range of A0 to AF hex by writing the value 64A0 hex to the Logical
Address Window Register (Base/Size format).
6. Enables the logical address window of the VXI-MXI in VXIbus Mainframe #5 for the entire
inward mapping range of 0 to FF. Scans all logical addresses, skipping all previously
encountered devices and previously defined address ranges. Finds the Slot 0 device and
uses it to move all DC devices in VXIbus Mainframe #5 to the lowest unused logical
addresses. No more VXI-MXI interfaces are found. The RM enables the logical address
window for the VXI-MXI in VXIbus Mainframe #5 with an inward range of B0 to BF hex
by writing the value 64B0 hex to the Logical Address Window Register (Base/Size format).
7. Sets the logical address window of the VXI-MXI found at logical address 82 to cover the
ranges of the VXI-MXI in VXIbus Mainframe #4 (A0 to AF) and the VXI-MXI in VXIbus
Mainframe #5 (B0 to BF). Enables the logical address window of the VXI-MXI at logical
address 82 with an outward range of A0 to BF by writing the value 43A0 hex to the Logical
Address Window Register (Base/Size format).
8. Sets the logical address window of the VXI-MXI found in VXIbus Mainframe #3 at logical
address 80 to cover the devices in that mainframe (80 to 8F) and the ranges required of its
Level 2 devices: the VXI-MXI in VXIbus Mainframe #4 (A0 to AF) and the VXI-MXI in
VXIbus Mainframe #5 (B0 to BF). Enables the logical address window of the VXI-MXI at
logical address 80 with an inward range of 80 to BF by writing the value 6280 hex to the
Logical Address Window Register (Base/Size format).