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MESC TOOL NEWS:
MESCT-AS79-991216D
Please take note of the following problems in using relocatable assembler AS79 for the 7900 series of microcomputers.
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Versions Concerned
AS79 V.1.00 Release 1 -- V.3.20 Release 1 (AS79 included with C compiler NC79WA for the 7900 series MCUs is also concerned.)
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Problem in as79
- 2.1 Description
- When the default optimization level for jump size configured in as79 is used, the following error message is displayed if optimized jump processing is undefined:
[Message Displayed]: jump optimaize pass exceeded, non-optimize jump size selected
- 2.2 Workaround
- Change the optimization level with as79's command option "+optpass=" as follows:
- When the change is made on as79: as79 +optpass=50 test.a79
- When the change is made on nc79: nc79 -c -as79 "+optpass=50" test.c
- The notes concerning the above command option "+optpass" are described below:
- (1)Any value within the range of 0 to 100 is available as an optimization level.
- (2)If a value outside the above range is chosen, the default optimization level takes effect, instead. The default optimization level in each version of as79 is shown in the following table:
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| Version of AS79 | Default Optimization Level |
| V.1.00 Release 1 -- V.3.10 Release 2 | 7 |
| V.3.20 Release 1 | 20 |
- (3)The command option can be placed anywhere in the command line.
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Problem in ln79
- 3.1 Description
- When the linker is invoked with a command file selected, the relocatable file or command parameter before the end-of-file code (EOF) cannot be executed unless a hard break is inserted prior to the EOF.
- 3.2 Example
- In the following command file, "file2" cannot be executed:
- ------------------
- file1 file2[EOF]
- ------------------
- 3.3 Workaround
- Be sure to place a hard-break code at the end of the final line of the command file as follows:
- ------------------
- file1 file2[RET]
- [EOF]
- ------------------
- 3.4 Schedule of fixing problem
- We plan to fix this problem in our next release.
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