The carry from bit3 to bit4 needed for adding packed binary coded decimal number correctly, where two binary coded decimal digits reside in one8-bit byte. 在兩個用二進位編碼的十進位數字同居於一個8位位元組內的情況下，為了正確地對裝配型二進位編碼的十進位數進行相加所需的從第3位到第4位的進位。
A binary-coded decimal code for representing decimal numbers in which each decimal digit is represented by seven binary digits which are coefficients of 8,6,4,2,0,1,0, respectively. 用於表示十進位數的一種二進位編碼的十進位碼，其中每位十進位數用七位二進位數來表示，它們分別是8,6,4,2,0,1和0的係數。
