Hercules User Reference Guide - The Hercules System/370, ESA

7.13 B+ (Set breakpoint)

7.13.1 Function

The B+ command sets a breakpoint. The argument gives an instruction address or a range of addresses where you wish to halt the execution. Once the breakpoint is reached, instruction execution is temporarily halted and the next instruction to be executed is displayed. You may then examine registers and / or storage etc. To continue execution after reaching a breakpoint enter the “G” command.

The “B” and “B+” commands are synonymous with the “S+” command.

7.13.2 Syntax

Descriptive

B+ { addr

| addr-addr

}

Diagram

Êʬ¬¬ B+ ¬¬¬§¬¬¬¬¬¬

¬¬¬ addr

¬¬¬¬¬¬§¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬¬ÊÍ addr

addr

¬¬¬¬¯

7.13.3 Parameter

addr

Instruction address or range of addresses where instruction execution is to be stopped.

7.13.4 Examples

Example 1:

Set a breakpoint at instruction address 01000000.

12:50:14.546 00000FC4 b+ 01000000

12:50:14.546 00000FC4 HHCPN040I Setting breakpoint at 0000000001000000-0000000001000000

Figure 25: B+ command

Hercules Emulator V3.09 – User Reference Guide Page 187