| 摘要 |
1,048,954. Electric digital data-storage; counters. INTERNATIONAL BUSINESS MACHINES CORPORATION. Feb. 8, 1965 [March 9, 1964], No. 5293/65. Headings G4A and G4C. Data entered into one end of a data register is propagated along to the vacant position nearest the other end under control of means sensing the presence or absence of data in each position. In Fig. 1 (not shown) one-bit bi-stable stages are respectively set (to 1) by a gate if presently at 0 with the preceding state at 1. Setting of a given stage resets (to 0) the previous stage. Exceptions to this general rule are that the first stage is set if presently at 0 with the register input at 1, and the last stage is reset by a readout pulse which also enables an output gate fed by the last stage. Thus the register stores all 1's received at the input in the stages nearest the output and not already occupied by 1's, until the register is full. Fig. 3 (not shown) shows a register in which each stage stores a four-bit character, and characters having at least one 1-bit are treated in the same way as 1-bits in the Fig. 1 (not shown) embodiment. |
