| 摘要 |
<p>Disclosed are methods and apparatus for multi-way program branching in a digital computer based on the contents of a data register. This is accomplished by loading any data field of interest into a data register and using the output lines as address lines to a plurality of read-only memory devices. Each device contains a set of random memory addresses. Logic circuits under program control select and enable one device, thereby producing one address. Finally, circuits under program control force a program branch to the location address produced. Thus, by programming the read-only memory devices and the computer appropriately, a plurality of sets of data fields are associated with and result in branches to a plurality of sets of locations, thereby giving the programmer the general capability of branching to any one of the plurality of locations within one instruction execution cycle based on the interrogation of any one data word.</p> |
