IBM System/370 145 Reference Summary page 137

Byte Bit PSWCTL 10
0 Reserved
1 Mask PER
2 Reserved
0
3 EPSWA Priority Mask
4 Reserved
5 Translation Mode
6 1/0
Master Mask
7 External Master Mask
RJ011
0
Reserved
1 Reserved
2 Reserved
1 3
EPSWB Reserved
4 EC Mode
5 Machine Check Mask
6 Machine Check Mask
7 Wait
Problem Bit
RJ012
0
Timer Mask
1
Ext Int Key Mask
2
External Signal Mask
2
3 MSKA
Reserved
4
Reserved
5 Reserved
6 Reserved
7 Reserved
RJ011
0
MPX Channel Mask
1
Sel Channel 1 Mask
2
Sel Channel 2 Mask
3
3
MSKB Sel Channel 3 Mask
4
Sel Channel 4 Mask
5
Reserved
6 Reserved
7
Reserved
RJ012
Ill
11.13