| 摘要 |
PURPOSE:To increase a transfer speed by utilizing a circulating memory. CONSTITUTION:Once access from an external device is started, the contents of the additional memory 4i of a magnetic bubble memory unit 2i spefified via a selection signal line 11 are all transferred to an additional memory 12. During this transfer, defective position data which corresponds to data stored in the memory 12 previously is read and sent out to the external device via a converting circuit 7. During data transfer in the next cycle, the converting operation is performed similarly. |
