IBM System/370 145 Reference Summary page 151

FAT- DIAGNOSTIC USAGE
Diagnostic Address 0
Diagnostic Address 1
0 No-Op } 0
1 Read Data Op 1
2 Write Data Op JL314 2
3 Write Gap Op 3
4 Compare Read Data JL215 4
5 ReadBufferO
l
JL0 12 5
6 Read Buffer 7
I
6
7 Serial Data JL014 7
Counter Pos 128 }
Counter Pos 64
Counter Pos 32
Counter Pos 16
Counter Pos 8 }
Counter Pos 4
Counter Pos 2
Counter Pos 1
Diagnostic Address 2
Diagnostic Address 3
1 Count Decode 21
2 Count Decode 2 JL 116 2 Count Decode 22
JL112
JL111
0 Count 0 Gate
l
1 Count Decode 1
3 Count Decode 3 3 Count Decode 23 JL 116
0 Count Decode 20
I
4 Count Decode 7 4 Count Decode 24
5 BCA Time JL216
5 Count Decode 25
6 Data Gate JL 117
6 Count Decode 26
7 Orientation Latch JL014
7 Count Decode 15
Diagnostic Address 4
Diagnostic Address 5
0 Read Gate
~
0
1 Write Gate JL412 1
2 Wr Clock Gate 2
3 Standard Index JL411 3
4 Block Clock Bits
l
JL 313 4
5 Serialized Data
I
5
6 Write Sync Gate
l
JL 117 6
7 Write Zero
I
7
Diagnostic Address 6
0 IFA High Trap Req JL611
1 IFA Low Trap Req}
2 ForceTrapBit-4 JL612
3 Force Trap Bit-5
4 Error Timeout JL612
5 Control Tag A JL512
6 Spare
7 Spare
11.27
Bit Ring 3 JL312
CC Register Pos 0 JL211
CC Register Pos 15 JL212
BCA Pos1t1on 1
l
JL 213
BCA Position 128
I
Address Mark 1
I
J L 413
Read Sync Gate
I
Head Condition JL411
Ill