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In the "options for target" dialog box on the "Target" tab (uVision IDE) there is a check box called "Use On-chip XRAM...". When looking at the help file for this it says:
Use On-chip XRAM (0x0-0x2FF) Specifies the usage of the on-chip components that are typically enabled in the CPU startup code. If you are using on-chip xdata ram (XRAM) you should also enable the XRAM access in the startup file.
This sounds to me like I need to check this box and modify the 'start900.A51' startup file to get the on chip xdata to work. Is my assumption correct? What exactly does 'Checking' this box do?
Is my assumption correct? yes as far as startup goes. What exactly does 'Checking' this box do? have no idea - I do not use the IDE and do not do anything beyond "modify the 'start900.A51' startup file "
Erik