GE 68K System - Manual (Page 25)

68K System Monitor
User's Guide
GE Energy Services
General SWM0023-1.00 -2
Full Release 2-7
Breakpoint Commands
Description Use these commands with the 68K Monitor for control and display of process
breakpoints in the system.
The three restrictions with the definition of breakpoints are:
• You must define breakpoints in code that is in RAM.
− The program instruction changes to a 68000 family TRAP instruction.
• You must define all program breakpoints at the beginning of an instruction.
• Only define breakpoints in a process.
− If the interrupt mask is non-zero when you enter the breakpoint handler, the
assumption is that the calling routine is an interrupt service procedure (ISP)
and breakpoints are not valid.
Note: Diagnostic Commands are suspended in order to use breakpoints.
List of
Commands This list shows the Breakpoint commands, in alphabetical order:
Command Description See Page
CB Clear Breakpoint 3-9
DB Define Breakpoint 3-21
PB Print Breakpoint 3-46
RB Resume Breakpoint 3-54
SB Step Breakpoint 3-68