I'm trying to simulate a simple design (written in assembler), in uVision4, that has a few memory mapped peripherals and uses P2 for GPIO. In "options for target" I set "Off-chip Ddata memory" to: Start: 0x0000 Size: 0x0100 When I run the simulator, external memory access is being done using P2, which causes problems when the value of P2 changes for GPIO. While searching the forum posts I found some mention of P2 addressing being the default for PDATA access, but found nothing about how to disable this for the simulator. Perhaps a parameter passed to S8051? Any ideas or insight would be appreciated.
Correct. It seems setting PPAGEENABLE equ 1 might do what I want but I'm not quite grocking the documentation. It seems there are a few things that have to be changed in sync to make this work...