Use of "Use multiple DPTR registers"

When we check "Use multiple DPTR registers" option in Keil uVision... Do we inform the compiler that our device support multiple DPTR so that it can use this to optimize code... or do we inform the compiler...
Use of "Use multiple DPTR registers"

When we check "Use multiple DPTR registers" option in Keil uVision... Do we inform the compiler that our device support multiple DPTR so that it can use this to optimize code... or do we inform the compiler...
Dual DPTR in the Debuger

Hi! I use a T89C51CC01 from Atmel WM, I would like to use the dual dptr feature on my program. When I run the Debugger, i can't switch the DPTR. In the µC manual, it says that we must set the DPS...
Dual DPTR in the Debuger

Hi! I use a T89C51CC01 from Atmel WM, I would like to use the dual dptr feature on my program. When I run the Debugger, i can't switch the DPTR. In the µC manual, it says that we must set the DPS...
Unfamaliar Syntax used with DPTR register

I have encountered an unfamiliar command syntax from an old assembly listing: MOV DPTR,#SFE (X_UDATA) . . . MOV DPTR,#SFB (X_UDATA) . . . RSEG X_UDATA What is SFE and SFB trying...