它的缺点是：英文字母不是连续地排列，中间出现多次断续，为撰写程序的人带来了一些困难。
·0x81 to 0x89 represent characters ‘a’ to ‘i’
·0x91 to 0x99 represent characters ‘j’ to ‘r’
·0xA2 to 0xA9 represent characters ‘s’ to ‘z’
·0xC1 to 0xC9 represent characters ‘A’ to ‘I’
·0xD1 to 0xD9 represent characters ‘J’ to ‘R’
0xE2 to 0xE9 represent characters ‘S’ to ‘Z’
