Magneto=optical memory with increased data writing rate - incorporates access control for selection of writing mode according to addressed area erasure

摘要

The disc (SM) is divided into areas (TG1-TG4), into which data can be written from the access control (SZ) linked to the system bus (SYB). Their addresses (ZTG1 etc.) are listed (BL) and checked for occupancy by the central processor (ZP). If the accessed area is found to have been erased, fresh data are written in a first mode. If not, a second mode is initiated, in which a preliminary erasure precedes the writing operation. USE/ADVANTAGE - For magneto-optical memories, with increased data write rate.