DUAL DATA POINTERS FOR DALLAS PARTS

Applies to: C51 C Compiler

Answer

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Information in this article applies to:

• C51 Version 5.50
• C51 Version 6.00 Beta
• C51 Version 6.00

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QUESTION

Is there a way to get the 8051 C compiler to use the dual data pointer's of the Dallas high-speed micro while copying memory? I don't want to resort to assembly.

ANSWER

Yes, there is. In C51 V5.xx, the MODDP2 directive uses the extra data pointer when you use the memcpy, memcmp, memmove, strcpy, and strcmp library routines.

SEE ALSO

• C51: DUAL DATA POINTER PERFORMANCE INCREASE
• C51: DUAL DATA POINTERS AND PHILIPS
• C51: CORRUPTION OF DPTR WHEN USING MODP2
• MON51: DOESN'T SAVE THE DUAL DATA POINTERS
• C51: ?C?COPYXX UNRESOLVED EXTERNAL FROM EVAL VERSION

Article last edited on: 2002-03-27 00:00:00