uint64_t value =  (uint64_t)(memory[256]) | //location contains byte 88
           (uint64_t)(memory[257]) << 8  |          //77
           (uint64_t)(memory[258]) << 16 |          //66
           (uint64_t)(memory[259]) << 24 |          //55
           (uint64_t)(memory[260]) << 32 |          //44
           (uint64_t)(memory[261]) << 40 |          //33
           (uint64_t)(memory[262]) << 48 |          //22
           (uint64_t)(memory[263]) << 56;           //11

printf("0x%x", value);