The copy of 10,000 items is costing a total of .2 milliseconds, each time. It's not free, but it's not that expensive either. All things considered, it's a small price to pay for writing ...

[code] cortex_m maskisr off [/ code] To generate one of the exceptions, “BusFault” exception and extract data, execute the unallocated memory space “0xf0000000” in STM32F1 series.