To set branch breakpoints

From the Assembler debug window, press B (Breakpoint) for a window to appear, containing four choices.
Press 3
Enter Y or N for each type of branch on which you can set a breakpoint:
- BCr halts execution on all successful Branch-on-Condition and Branch-on-Condition-Register instructions
- BALR/BR14 halts execution on the following instructions:
```
  BALR  14,15
  BASR  14,15
  BAL   14,label
  BAS   14,label
  BR    14
```
- BCTr halts execution on all successful Branch-on-Count instructions when the count register reaches zero
- BALr/BASr halts execution on all Branch-on-Link and Branch-on-Save instructions
Press Enter.