 |
|
|
MESC TOOL NEWS:
MESCT-NC308WA_2-000901D
NC308WA and AS308
Precautions
|
|---|
Please take note of the following problems in using C compiler NC308WA
(with an assembler and integrated development environment) and relocatable assembler AS308 for the M16C/80 series MCUs:
- On assembler directive command ".BTEQU"
- On bit operation instructions
- Problem on assembler directive command ".BTEQU"
- 1.1 Versions Concerned
- NC308WA V.1.00 Release 1 -- V.3.00 Release 1
AS308 V.1.00 Release 1 -- V.2.00 Release 1
- 1.2 Description
- If a bit position is set to 7 by using assembler directive command".BTEQU",
the value of the memory address plus 1 is displayed in the list file. Although this symptom appears
in the list file, nothing affects the object file created.
- 1.3 Example
-
-----------------------------------------------------------------------
bitsym1 .btequ 7,100h ; "7,00000101h" is displayed
; in the list file.
bitsym2 .btequ 15,100h ; "7,00000102h" is displayed
; in the list file.
-----------------------------------------------------------------------
- Note: In the above example, describing "bitsym2 .btequ 15,100h" is
the same as describing "bitsym2 .btequ 7,101h".
- 1.4 Workaround
- When a bit position is set to 7 by using assembler directive command ".BTEQU", and the memory address is referenced in the list file,
subtract 1 from the displayed value of the memory address.
- 1.5 Schedule of Fixing Problem
- We plan to fix this problem in our next release.
NC308WA and AS308 Precautions
MESCT-NC308WA_2-000901D
-
Problem on Bit Operation Instructions
- 2.1 Versions Concerned
- NC308WA V.1.00 Release 1 -- V.3.00 Release 1
AS308 V.1.00 Release 1 -- V.2.00 Release 1
- 2.2 Description
- If a program is assembled in which operands of bit operation
instructions are described with undefined symbols, AS308 may not
correctly be terminated, displaying "Page Fault".
- 2.3 Conditions
- This problem occurs if the following two conditions are satisfied:
- (1) An undefined symbol is used as the value of a bit in a bit operation instruction.
- (2) The addressing mode specified by the above instruction is not an absolute addressing mode.
- 2.4 Workaround
- Be sure to describe operands of bit operation instructions with
already-defined symbols.
- 2.5 Schedule of Fixing Problem
- We plan to fix this problem in our next release.
* The discrete sales of our assembler products were discontinued on
April 1; only C compilers (with an assembler and integrated development
environment TM) are available. Then, each assembler concerned will be
upgraded to the compiler including it and a TM with additional charge.
For further information please contact your local Mitsubishi Electric
sales office or distributor.
|
|
