| 摘要 |
PURPOSE:To speed up the retrieving processing of blank areas in assigned memory areas of a computer system by forming a means for holding positional information on a bit map to determine a memory area to be assigned in accordance with the held information. CONSTITUTION:A table scanning part 31 successively reads out bit strings with a fixed length from the bit map 13 and reads out one table out of tables 30-1-30-n by using the bit string as an address. When the read table whose contents are not a prescribed state, e.g. a state other than '0', is read out, the contents are set up in a register 32 or the address of the bit string on the map 13 at that time is set up in a register 33. Respective tables 30-1-30-n are set up in accordance with the size of respective assigned memory areas. Respective items of the tables 30-1-30-n are constituted so as to indicate a state not to be used by '0' or a state having a blank unit area to be used by non-'0'.
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