Forum Post: RE: RX210: Does RAM retain value upon RES# and Software Reset

You have to add your own section to the linker file and define that it is not initialised. initialize by copy { rw, ro section D, ro section D_1, ro section D_2 }; initialize by copy with packing = none { section __DLIB_PERTHREAD }; do not initialize  { section .*.noinit, rw section MYOWNSECTION }; define block HEAP     with alignment = 4, size = _HEAP_SIZE { }; define block USTACK   with alignment = 4, size = _USTACK_SIZE { }; define block ISTACK   with alignment = 4, size = _ISTACK_SIZE { }; define block STACKS with fixed order { block ISTACK,                                       block USTACK }; place at address mem:0xFFFFFF80 { ro section .nmivec }; "ROM16":place in ROM_region16        { ro section .code16*,                                       ro section .data16* }; "RAM16":place in RAM_region16        { rw section .data16*,                                       rw section __DLIB_PERTHREAD,                                       rw section MYOWNSECTION };