Go To Temporary Breakpoint (Gt) - Motorola M68CPU32BUG User Manual

GT
3.13 GO TO TEMPORARY BREAKPOINT
GT <addr>[:<count>]
Use the GT command to set a temporary breakpoint and start target code execution. A count may
be specified with the temporary breakpoint. Control is given at the target PC address. All
previously set breakpoints are enabled. The temporary breakpoint is removed when any
breakpoint with 0 count is encountered.
After setting the temporary breakpoint, the sequence of events is similar to that of the GO
command. At this point control is returned to CPU32Bug by:
Executing the .RETURN SYSCALL (TRAP #15) function
Press the ABORT switch or RESET switch of the M68300PFB Platform Board
Encountering a breakpoint with 0 count
Generation of an unexpected exception
EXAMPLE The following program resides at $4000.
CPU32Bug>MD 4000;DI<CR>
00004000 2200
00004002 4282
00004004 D401
00004006 E289
00004008 66FA
0000400A E20A
0000400C 55C2
0000400E 60FE
CPU32Bug>RM D0<CR>
Initialize D0 and set a breakpoint:
D0 =00000000 ? 52A9C.<CR>
CPU32Bug>BR 400E<CR>
BREAKFOINTS
0000400E
CPU32Bug>
Set PC to beginning of program, set temporary breakpoint, and start target code:
CPU32Bug>RM PC<CR>
PC =0000400E ? 4000.<CR>
CPU32Bug>
M68CPU32BUG/D REV 1
Go To Temporary Breakpoint
MOVE.L
CLR.L
ADD.B
LSR.L
BNE.B
LSR.B
SCS
BRA.B
3-26
DEBUG MONITOR COMMANDS
D0,D1
D2
D1,D2
#$1,D1
$4004
#$1,D2
D2
$400E
GT