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|  MIL-D-70789A (AR)
APPENDIX D
**************************************************************
30.4.7
BUILT-IN-TEST (BIT) DATA
Message:
DRU
To:
Prime System
From:
Number of Data Characters: 2
Binary
Data Format:
MESSAGE STRUCTURE
ERROR DET.
ECHO
STATUS
DATA (D)
CODE (E) FLAG(F)
S1 , S2
FLAG(F)
SEQ#(N)
IDENTIFIER(I)
01111110
XXX
16 bits 01111110
DI-D2
00100
16 Bits
The presence of a "1" in any of the bit positions of this data indicates
that the device represented by that bit is not functioning properly.
D1 Character
Device Tested
Bit Position
7
DRU
6
Spare
Spare
5
4
Spare
Spare
3
2
Spare
Spare
1
Spare
0
D2 Character
Device Tested
Bit Position
Spare
7
Spare
6
Spare
5
Spare
4
Spare
3
Spare
2
VMS
1
VMS Drive
0
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