IBM System/370 145 Reference Summary page 138

~te
Bit MISC- 12
0
0-7 Extint
External Interrupt Signals
BE071
1
0-7
Reserved
2
0-7 EC Level Last Two Digits of Micro
EC Level
RD061
3
0-7 Serial 1
First Two Digits of Machine
Serial No.
BD072
CHANNEL TO CHANNEL FEATURE
~te Bit
CTCAX - 11 and CTCA Y - 13
0
Command Check
1
Intervention Required
2
Buffer Check
0
3
Equipment Check
4
Selection Check
5
Sequence Check
6
Status Generation Check
7
HIO or Selective Reset
BF001 BF002
0
Ready Latch
1
Select Propagate
2
Side Selected
1
3
Sequence Counter 1
4
Sequence Counter 2
5
Sequence Counter 3
6
Sequence Counter 4
7
Sequence Counter 5
BF002 BF001
0
Disconnect
1
Status Parity Bit Predict
2
Attention Latch
2
3
Busy Bit
4
Channel End
5
Device End
6
Unit Check
7
Unit Exception
BF001 BF002
0
Stack Status Latch
1
Write Command
2
Read Command
3
3
Control Command
4
Sense Command
5
End-of-File Command
6
Spare
7
Enable Compatibility (Ext 11 )/Data-In
Mode (Ext 13)
BF002 BF001
•
NOTE: Odd parity not maintained in these externals.
Refer to XX--- logics.
11.14