here is orignal uart.c #ifdef SCC_CONSOLE switch (state->smc_scc_num) { case 0: page = CPM_CR_SCC1_PAGE; sblock = CPM_CR_SCC1_SBLOCK; break; case 1: page = CPM_CR_SCC2_PAGE; sblock = CPM_CR_SCC2_SBLOCK; break; case 2: page = CPM_CR_SCC3_PAGE; sblock = CPM_CR_SCC3_SBLOCK; break; } ....
so SCC4 is unusable, here is missing code: case 3: page = CPM_CR_SCC4_PAGE; sblock = CPM_CR_SCC4_SBLOCK; break; }