Shadowed rašė:
> Nu jau matyt "artėju" :D Su
> 
> const char *ROM_Address = (char*) ROM_address;
> 
> char ROMAS[] = {0,0,0,0,0,0,0,0};

Vienas baitas hex eilutėje bus jau 2 baitai, plius tai – C eilutė, o tos
turi baigtis \0:

char ROMAS[sizeof(ROM_address) * 2 + 1]
snprintf(ROMAS, sizeof(ROMAS), "%02X%02X%02X%02X%02X%02X%02X%02X",
ROM_Address[0], ROM_Address[1], ROM_Address[2], ROM_Address[3],
ROM_Address[4], ROM_Address[5], ROM_Address[6], ROM_Address[7]);