Motorola M68CPU32BUG User Manual Page 59
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SYSTEM CALLS
M68CPU32BUG/D REV 1 5-6
.CHANGEV Parse Value, Assign to Variable .CHANGEV
If the above code was called with a syscall routine and BUFFER contained ’’1 3’’ in pointer/count
format and POINT contained 2 (longwords), then COUNT would be assigned the value 3, and
POINT would contain 4 (pointing to first character past 3). Note that POINT is the offset of the
buffer start address (not the address of the first character in the buffer) to the next character to
process. In this case, a value of 2 in POINT indicates that the space between 1 and 3 is the next
character to be processed. After calling .CHANGEV, the screen displays:
COUNT = 3
If the above code was called again, nothing could be parsed from BUFFER, so a prompt would
be issued. For example, if the string 5 is entered in response to the prompt.
COUNT = 3? 5<CR>
COUNT = 5
If in the previous example nothing had been entered at the prompt, COUNT would retain its prior
value.
COUNT = 3? <CR>
COUNT = 3
SYSTEM CALLS
M68CPU32BUG/D REV 1 5-3
Table 5-1. CPU32Bug System Call Routines
Function Trap Code Description
.BINDEC $0064 Convert binary to Binary Coded Decimal (BCD)
.CHANGEV $0067 Parse value
.CHKBRK $0005 Check for break
.DELAY $0043 Timer delay function
.DIVU32 $006A Divide two 32-bit unsigned integers
.ERASLN $0027 Erase line
.INCHR $0000 Input character
.INLN $0002 Input line (pointer/pointer format)
.INSTAT $0001 Input serial port status
.MULU32 $0069 Multiply two 32-bit unsigned integers
.OUTCHR $0020 Output character
.OUTLN $0022 Output line (pointer/pointer format)
.OUTSTR $0021 Output string (pointer/pointer format)
.PCRLF $0026 Output carriage return and line feed
.READLN $0004 Input line (pointer/count format)
.READSTR $0003 Input string (pointer/count format)
.RETURN $0063 Return to CPU32Bug
.SNDBRK $0029 Send break
.STRCMP $0068 Compare two strings (pointer/count format)
.TM_INI $0040 Timer initialization
.TM_RD $0042 Read timer
.TM_STR0 $0041 Start timer at T=0
.WRITD $0028 Output string with data (pointer/count format)
.WRITDLN $0025 Output line with data (pointer/count format)
.WRITE $0023 Output string (pointer/count format)
.WRITELN $0024 Output line (pointer/count format)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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- M68CPU32BUG DEBUG MONITOR 1
- USER’S MANUAL 1
- M68CPU32BUG/D 1
- TABLE OF CONTENTS 2
- LIST OF FIGURES 3
- LIST OF TABLES 3
- 1.5 SYSTEM RESTART 5
- CHAPTER 1 5
- GENERAL INFORMATION 5
- 1.1 INTRODUCTION 5
- 1.2 GENERAL DESCRIPTION 5
- 1.3 USING THIS MANUAL 6
- 1.6 MEMORY REQUIREMENTS 7
- CHAPTER 2 9
- DEBUG MONITOR DESCRIPTION 9
- 2.1 INTRODUCTION 9
- Freescale Semiconductor, Inc 10
- 2.6 FUNCTION CODE SUPPORT 13
- CHAPTER 3 16
- DEBUG MONITOR COMMANDS 16
- 3.1 INTRODUCTION 16
- BC Block of Memory Compare BC 17
- BF Block of Memory Fill BF 17
- BS Block of Memory Search BS 19
- BM Block of Memory Move BM 19
- BR Breakpoint Insert BR 20
- BV Block of Memory Verify BV 21
- DU Dump S-Records DU 23
- DC Data Conversion DC 23
- GN Go To Next Instruction GN 25
- GO Go Execute User Program GO 27
- HE Help HE 29
- MA Macro Define/Display MA 31
- MAE Macro Edit MAE 33
- MM Memory Modify MM 35
- MD Memory Display MD 36
- MS Memory Set MS 38
- PF Port Format PF 39
- PA Printer Attached PA 40
- RD Register Display RD 41
- RS Register Set RS 43
- RESET Cold/Warm Reset RESET 44
- RM Register Modify RM 44
- T Trace T 45
- SD Switch Directories SD 45
- TM Transparent Mode TM 48
- 4.2SOURCE PROGRAM CODING 51
- CHAPTER 4 52
- ASSEMBLER/DISASSEMBLER 52
- 4.1 INTRODUCTION 52
- 5.2 SYSTEM CALL ROUTINES 57
- CHAPTER 5 58
- SYSTEM CALLS 58
- 5.1 INTRODUCTION 58
- .ERASLN Erase Line .ERASLN 61
- .OUTSTR .OUTSTR 66
- .SNDBRK Send Break .SNDBRK 68
- .TM_RD Read Timer .TM_RD 70
- .WRITELN .WRITELN 71
- .WRITDLN .WRITDLN 71
- 6.3 UTILITIES 73
- CHAPTER 6 73
- DIAGNOSTIC FIRMWARE GUIDE 73
- 6.1 INTRODUCTION 73
- 6.2 DIAGNOSTIC MONITOR 73
- CPU B Instruction Test CPU B 75
- CPU CPU Tests For The MCU CPU 76
- CPU A Register Test CPU A 76
- CPU C Address Mode Test CPU C 77
- MT Memory Tests MT 78
- MT D Set Bus Data Width MT D 79
- MT A Set Function Code MT A 79
- MT B Set Start Address MT B 80
- MT C Set Stop Address MT C 80
- MT H Random Byte Test MT H 81
- MT E March Address Test MT E 81
- MT F Walk a Bit Test MT F 82
- MT G Refresh Test MT G 82
- MT I Program Test MT I 83
- MT J Test and Set Test MT J 84
- BERR Bus Error Test BERR 84
- APPENDIX A 85
- S-RECORD INFORMATION 85
- A.1 INTRODUCTION 85
- A.2 S-RECORD CONTENT 85
- A.3 S-RECORD TYPES 86
- A.4 S-RECORDS CREATION 86
- C.2 CPU32BUG CUSTOMIZATION 87
- APPENDIX B 87
- SELF-TEST ERROR MESSAGES 87
- B.1 INTRODUCTION 87
- APPENDIX C 88
- USER CUSTOMIZATION 88
- C.1 INTRODUCTION 88
- C.3 CUSTOMIZATION TABLE 90
- C.4 COMMUNICATION FORMATS 93
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