Chapter 4
Register Descriptions
VME-MXI-2 User Manual
4-6
© National Instruments Corporation
VXIbus Status Register (VSR)
VMEbus A16 Offset:
4 (hex)
Attributes:
Read Only
32, 16, 8-bit accessible
15
14
13
12
11
10
9
8
A24/A32
ACTIVE
MODID*
EDTYPE[3]
EDTYPE[2]
EDTYPE[1]
EDTYPE[0]
X
ACCDIR
7
6
5
4
3
2
1
0
VERSION[3]
VERSION[2]
VERSION[1]
VERSION[0]
READY
PASSED
SFINH
RESET
This register contains status information about the VME-MXI-2. This register conforms
to the VXIbus specification. When accessed with a 32-bit cycle, the bits of this register
appear on bits 31 to 16 along with the VXIbus Offset Register (VOR) on bits 15 to 0.
Bit
Mnemonic
Description
15
A24/A32 ACTIVE
A24/A32 Active
This bit reflects the state of the A24/A32
ENABLE bit in the VXIbus Control Register
(VCR). A 1 indicates that the local A24/A32
registers and memory can be accessed.
14
MODID*
MODID Line Status
This bit is hard wired to 1 since the VME-MXI-2
cannot be selected using the VXIbus MODID
protocol.
13-10
EDTYPE[3:0]
Extended Device Type Class
These bits provide information about the
additional capabilities of the VME-MXI-2 as
determined by optional configurations or
daughter boards. These bits return E (hex) on the
standard VME-MXI-2 and are not affected by
hard or soft resets.
9
X
Reserved
This is a reserved bit. The value it returns is
meaningless.
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