7.
    发明专利
    未知

    公开(公告)号:DE1270106B

    公开(公告)日:1968-06-12

    申请号:DE1270106

    申请日:1962-12-18

    Applicant: IBM

    Abstract: 976, 204. Digital data stores. INTERNATIONAL BUSINESS MACHINES CORPORATION. Dec. 5, 1962 [Dec. 28, 1961], No. 45894/62. Heading G4C. A multi-bit character read photo-electrically from a punched tape 12 is stored in register 25, and selected groups of bits are read out from this register sequentially, these groups of bits being used to address a store which contains representations of the tape characters in 1, 2, 4, 8, A, B, C code at the corresponding addresses. If,as shown, the tape characters have less than eight bits, 1's are entered in the spare positions (6, 7, 8) of register 25. A timing circuit gates out the bit groups 7, 8; 4-6; 1-3; in sequence to register 40, a check bit being added by generator 35. Each address character is read out from register 40 bit by bit before the next one is entered, and is transferred in turn to a magnetic core matrix store 11. An address register 80 is then used to address the store (not shown) containing the recoded representation of the character. The address may be modified by means of a singlecharacter adder 90 which adds to each address character delivered by register 40, the corresponding one of three characters stored in modifier register 91.

Patent Agency Ranking