Motorola M68CPU32BUG Manuel d'utilisateur Page 93
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Noté. / 5. Basé sur avis des utilisateurs
DEBUG MONITOR COMMANDS
M68CPU32BUG/D REV 1 3-63
TC Trace On Change Of Control Flow TC
3.31 TRACE ON CHANGE OF CONTROL FLOW
TC [<count>]
Use the TC command to start execution at the address in the target PC. Tracing begins at
detection of an instruction that causes a change of control flow, such as Bcc, JSR, BSR, RTS,
etc. Execution is in real time until a change of flow instruction is encountered. The optional
count field specifies the number of change of flow instructions to be traced before returning
control to CPU32Bug. The optional count field default is 1. Register display printout only occurs
when a change of control flow occurs.
During tracing, breakpoints in ROM or write protected memory are monitored (but not inserted)
for all trace commands which allow the use of breakpoints. Note that the TC command
recognizes a breakpoint only if it is at a change of flow instruction. Control is returned to
CPU32Bug if a breakpoint with 0 count is encountered. See the trace (T) command for more
details.
The trace functions are implemented with the trace bits (T0, T1) in the MCU device status
register. Do not modify the trace bits (T0, T1) while using the trace commands. Because the trace
functions are implemented using the hardware trace bits in the MCU, code in ROM can be
traced. During trace mode, breakpoints are monitored and their counts decremented when the
corresponding instruction with breakpoint is traced. This allows breakpoints to work in ROM,
but only in the trace mode.
EXAMPLE The following program resides at location $7000.
CPU32Bug>MD 7000;DI<CR>
00007000 2200 MOVE.L D0,D1
00007002 4282 CLR.L D2
00007004 D401 ADD.B D1,D2
00007006 E289 LSR.L #$1,D1
00007008 66FA BNE.B $7004
0000700A E20A LSR.B #$1,D2
0000700C 55C2 SCS.B D2
0000700E 60FE BRA.B $700E
CPU32Bug>
Initialize PC and D0:
CPU32Bug>RM PC <CR>
PC =00008000 ? 7000.<CR>
CPU32Bug>RM D0 <CR>
D0 =00000000 ? 8F41C.<CR>
- M68CPU32BUG DEBUG MONITOR 1
- USER’S MANUAL 1
- M68CPU32BUG/D 1
- TABLE OF CONTENTS 3
- M68CPU32BUG/D REV 1 ii 4
- M68CPU32BUG/D REV 1 iii 5
- M68CPU32BUG/D REV 1 iv 6
- M68CPU32BUG/D REV 1 v 7
- LIST OF FIGURES 8
- LIST OF TABLES 8
- CHAPTER 1 9
- 1.1 INTRODUCTION 9
- 1.2 GENERAL DESCRIPTION 9
- GENERAL INFORMATION 10
- M68CPU32BUG/D REV 1 1-2 10
- 1.3 USING THIS MANUAL 11
- 1.5 SYSTEM RESTART 12
- 1.6 MEMORY REQUIREMENTS 13
- Figure 1-2. BCC Memory Map 14
- M68CPU32BUG/D REV 1 1-7 15
- M68CPU32BUG/D REV 1 1-8 16
- CHAPTER 2 17
- DEBUG MONITOR DESCRIPTION 17
- 2.1 INTRODUCTION 17
- M68CPU32BUG/D REV 1 2-2 18
- M68CPU32BUG/D REV 1 2-3 19
- M68CPU32BUG/D REV 1 2-4 20
- M68CPU32BUG/D REV 1 2-5 21
- M68CPU32BUG/D REV 1 2-6 22
- M68CPU32BUG/D REV 1 2-7 23
- M68CPU32BUG/D REV 1 2-8 24
- M68CPU32BUG/D REV 1 2-9 25
- M68CPU32BUG/D REV 1 2-10 26
- M68CPU32BUG/D REV 1 2-11 27
- 2.6 FUNCTION CODE SUPPORT 28
- M68CPU32BUG/D REV 1 2-13 29
- M68CPU32BUG/D REV 1 2-14 30
- CHAPTER 3 31
- 3.1 INTRODUCTION 31
- M68CPU32BUG/D REV 1 3-2 32
- BC Block of Memory Compare BC 33
- BF Block of Memory Fill BF 35
- BM Block of Memory Move BM 37
- BR Breakpoint Insert BR 39
- BS Block of Memory Search BS 40
- BV Block of Memory Verify BV 43
- DC Data Conversion DC 45
- DU Dump S-Records DU 46
- M68CPU32BUG/D REV 1 3-19 49
- M68CPU32BUG/D REV 1 3-20 50
- GN Go To Next Instruction GN 51
- GO Go Execute User Program GO 53
- M68CPU32BUG/D REV 1 3-26 56
- M68CPU32BUG/D REV 1 3-27 57
- HE Help HE 58
- M68CPU32BUG/D REV 1 3-31 61
- M68CPU32BUG/D REV 1 3-32 62
- M68CPU32BUG/D REV 1 3-33 63
- MA Macro Define/Display MA 64
- MAE Macro Edit MAE 67
- M68CPU32BUG/D REV 1 3-39 69
- MD Memory Display MD 70
- MM Memory Modify MM 72
- MS Memory Set MS 74
- M68CPU32BUG/D REV 1 3-45 75
- M68CPU32BUG/D REV 1 3-46 76
- M68CPU32BUG/D REV 1 3-47 77
- PA Printer Attached PA 78
- PF Port Format PF 79
- RD Register Display RD 82
- RESET Cold/Warm Reset RESET 86
- RM Register Modify RM 87
- RS Register Set RS 88
- SD Switch Directories SD 89
- T Trace T 90
- M68CPU32BUG/D REV 1 3-63 93
- Trace on change of flow: 94
- TM Transparent Mode TM 95
- M68CPU32BUG/D REV 1 3-66 96
- M68CPU32BUG/D REV 1 3-67 97
- M68CPU32BUG/D REV 1 3-68 98
- M68CPU32BUG/D REV 1 3-69 99
- DEBUG MONITOR COMMANDS 100
- M68CPU32BUG/D REV 1 3-70 100
- M68CPU32BUG/D REV 1 3-71 101
- M68CPU32BUG/D REV 1 3-72 102
- CHAPTER 4 103
- ASSEMBLER/DISASSEMBLER 103
- 4.1 INTRODUCTION 103
- 4.2SOURCE PROGRAM CODING 104
- M68CPU32BUG/D 4-3 105
- M68CPU32BUG/D 4-4 106
- Pseudo Registers 107
- Main Processor Registers 107
- M68CPU32BUG/D 4-6 108
- M68CPU32BUG/D 4-7 109
- M68CPU32BUG/D 4-8 110
- M68CPU32BUG/D 4-9 111
- M68CPU32BUG/D 4-10 112
- M68CPU32BUG/D 4-11 113
- 0000D000 6000BF68 BRA *-4096 114
- 0000D000 60FE BRA.B * 114
- 0000D000 4EF90000 D000 JMP * 114
- CHAPTER 5 115
- SYSTEM CALLS 115
- 5.1 INTRODUCTION 115
- 5.2 SYSTEM CALL ROUTINES 116
- M68CPU32BUG/D REV 1 5-3 117
- M68CPU32BUG/D REV 1 5-4 118
- M68CPU32BUG/D REV 1 5-5 119
- COUNT = 3 120
- COUNT = 3? 5<CR> 120
- COUNT = 5 120
- COUNT = 3? <CR> 120
- SYSCALL .CHKBRK 121
- BEQ BREAK 121
- M68CPU32BUG/D REV 1 5-8 122
- M68CPU32BUG/D REV 1 5-9 123
- .ERASLN Erase Line .ERASLN 124
- SYSCALL .INCHR Call .INCHR 125
- M68CPU32BUG/D REV 1 5-12 126
- M68CPU32BUG/D REV 1 5-13 127
- M68CPU32BUG/D REV 1 5-14 128
- MOVE.B D0,-(A7) 129
- Send character in D0 129
- SYSCALL .OUTCHR 129
- To default output port 129
- .OUTSTR .OUTSTR 130
- M68CPU32BUG/D REV 1 5-17 131
- PEA (A0) 132
- Long buffer address 132
- SYSCALL .READLN 132
- M68CPU32BUG/D REV 1 5-19 133
- SYSCALL .RETURN 134
- Return to CPU32Bug 134
- .SNDBRK Send Break .SNDBRK 135
- M68CPU32BUG/D REV 1 5-22 136
- SYSCALL .TM_INI 137
- Initialize timer 137
- .TM_RD Read Timer .TM_RD 138
- SYSCALL .TM_STR0 139
- Start Timer at T=0 .TM_STR0 140
- .WRITDLN .WRITDLN 141
- .WRITELN .WRITELN 143
- CHAPTER 6 145
- DIAGNOSTIC FIRMWARE GUIDE 145
- 6.1 INTRODUCTION 145
- 6.2 DIAGNOSTIC MONITOR 145
- M68CPU32BUG/D REV 1 6-2 146
- M68CPU32BUG/D REV 1 6-3 147
- 6.3 UTILITIES 148
- M68CPU32BUG/D REV 1 6-5 149
- CPU CPU Tests For The MCU CPU 150
- CPU A Register Test CPU A 151
- CPU B Instruction Test CPU B 152
- CPU C Address Mode Test CPU C 153
- M68CPU32BUG/D REV 1 6-10 154
- MT Memory Tests MT 155
- M68CPU32BUG/D REV 1 6-12 156
- MT A Set Function Code MT A 157
- MT B Set Start Address MT B 158
- MT C Set Stop Address MT C 159
- MT D Set Bus Data Width MT D 160
- MT E March Address Test MT E 161
- MT F Walk a Bit Test MT F 162
- MT G Refresh Test MT G 163
- MT H Random Byte Test MT H 164
- MT I Program Test MT I 165
- MT J Test and Set Test MT J 166
- BERR Bus Error Test BERR 167
- M68CPU32BUG/D REV 1 6-24 168
- APPENDIX A 169
- S-RECORD INFORMATION 169
- A.1 INTRODUCTION 169
- A.2 S-RECORD CONTENT 169
- A.3 S-RECORD TYPES 170
- A.4 S-RECORDS CREATION 171
- M68CPU32BUG REV 1 A-4 172
- APPENDIX B 173
- SELF-TEST ERROR MESSAGES 173
- B.1 INTRODUCTION 173
- M68CPU32BUG REV 1 B-2 174
- APPENDIX C 175
- USER CUSTOMIZATION 175
- C.1 INTRODUCTION 175
- C.2 CPU32BUG CUSTOMIZATION 176
- M68CPU32BUG REV 1 C-3 177
- C>DEL TMP.MX<CR> 178
- C>DEL C32B1.MX<CR> 178
- C.3 CUSTOMIZATION TABLE 179
- M68CPU32BUG REV 1 C-6 180
- M68CPU32BUG REV 1 C-7 181
- ROM AUTO BOOT VECTORS 182
- Periodic Interrupt Timer 183
- M68CPU32BUG REV 1 C-10 184
- M68CPU32BUG REV 1 C-11 185
- M68CPU32BUG REV 1 C-12 186
- M68CPU32BUG REV 1 C-13 187
- C.4 COMMUNICATION FORMATS 188
- M68CPU32BUG REV 1 C-15 189
- M68CPU32BUG REV 1 C-16 190
- Platform Board 191
- M68CPU32BUG REV 1 C-18 192
- Offset Value Comment 193
- M68CPU32BUG REV 1 C-20 194
- M68CPU32BUG REV 1 C-21 195
- M68CPU32BUG REV 1 C-22 196
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