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⟦93f7319a7⟧ Wang Wps File
Length: 1096 (0x448)
Types: Wang Wps File
Notes: Spelunked
Names: »~ORPHAN01.11«
Derivation
└─⟦b3a67856d⟧ Bits:30006040 8" Wang WCS floppy, CR 0065A
└─ ⟦this⟧ »~ORPHAN01.11«
WangText
e F̲ree B̲lock M̲ap. FBM is a bit array of length NO OF BLOCKS. The bit corresponding
to a block is set, if the block is not allocated to a CIF.
When storage is allocated to a CIF, either when the
CIF is created or when it is extended, one or more
blocks are allocated and reserved for the CIF. The
blocks allocated to a CI are described in the CIF Block
List of the CIF. The blocks allocated to a CIF will
be selected in such a way, that they are physically
as close as possible to each other. When blocks are
deallocated from a CIF, they may be freed at once,
and thu transferred to FBM. The blocks may however
be subject to purge before they may be reused. Blocks
which must be purged are described in the P̲urge B̲lock
M̲ap, which is a bit array of length NO OF BLOCKS.
When the block has actually been purged, itis transferred
from PBM to FBM.
Each block is at a given time in one of the following
states:
a) Allocated to a CIF
b) Free
c) Subject to Purge
Block state transitions are shown on figure 4.2.1.1.1-1.
