MON390: MOVX CALLED AFTER WR_CODE RETURNS
Information in this article applies to:
When configuring the MON390 INSTALL.A51 file for writing to code space, the WR_CODE function (shown below) must be modified to match the hardware configuration.
WR_CODE: MOVX @DPTR,A RET
In most cases, a simple MOVX @DPTR,A is all that is required.
In situations that require customization, the WR_CODE function seems to work fine. However, something seems to overwrite or corrupt code memory.
In versions of MON390 shipped with C51 Version 7.05 and earlier, a MOVX @DPTR, A instruction was invoked directly in the MON390 library. This may cause code memory corruption in some situations.
C51 releases Version 7.06a and later include the corrected monitor library. You may download the latest updates from the Keil Website.
Last Reviewed: Friday, July 22, 2005
of your data.