| 摘要 |
PURPOSE:To increase a data storage area without increasing the capacity of the whole device, by adopting such a storage system as provides one address part on one block consisting of plural data sectors. CONSTITUTION:Each block 0-3 of an auxiliary storage device consists of plural sectors (4 sectors), and address parts AD0-AD3 are provided on each block 0-3, respectively. In this state, upper bits of an address are assigned to the block and lower bits of the address are assigned to the sector. An address 2 containing a prescribed sector 22 is outputted from an access device of the auxiliary storage device. In accordance with this address, when an address AD1 being nearest to the AD2 of the block 2 has been detected, the lower bit of the address is outputted to a decoder 106, and a signal 109 for designating a prescribed sector is outputted. At the same time, a pseudo gate singal generating circuit 104 outputs its signal, and a gate singal for accessing the data sector 22 is outputted from an AND113. |
