![]() The addresses can still be used to manually invoke a branch, such as returning from a subroutine using the instruction MOV PC, LR. As a result the program counter starts with instruction 1 at address 0x0.ĭuring execution, this instruction space memory is not available for read or write access. Since VisUAL does not emulate external device configuration, the memory model for VisUAL is a lot simpler: the lower memory addresses are reserved for saving instructions. For example, in the ARM Cortex M3, the lower 512MB of memory addresses are reserved as code memory. ![]() ![]() ![]() The exact distribution of memory between resources is hardware-specific. The following diagram shows the general configuration of the VisUAL memory map:
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