Improvements in data transfer systems between direct access memory and magnetic drum or similar storage memory. (Machine-translation by Google Translate, not legally binding)

摘要

Improvements in transfer systems between direct access memory and magnetic drum or similar storage memory, whose registration means are divided into sectors. Where a data processing unit establishes transfer requests, it archives them according to the transfer start sector and registers them in the direct access memory. Where a drum unit or similar memory includes means for reading a transfer request in the direct access memory according to the immediately accessible sector, means for carrying out the required transfer and for constituting, at the end of the transfer, an indication, called return bit, which includes the sector number and sent to the data processing unit. It includes, in the direct access memory, a storage part constituted by various memory elements, called return elements, each of which is intended to store a return bit. In the drum unit there are means to successively access these return elements by writing a return bit at the end of each transfer in the same units. In the data processing unit there are means, which are periodically acted upon to access said return elements, in order to read the bits; contained in them and perform, for each of them, the required process. By means of these configurations, the drum unit can make several successive transfers without the intervention of the data processing unit. (Machine-translation by Google Translate, not legally binding)