(57) An improved inter-area-data transfer control system is disclosed which includes a
display control device provided with an area movement function and is capable of providing
the logical transverse widths of source (SW) and destination (DW) areas (registers
72 and 74) in a logical memory space separately from each other so as to reduce time
required to execute the transfer of data from the source area to the destination area.
The system comprises: means (71) for specifying a transfer start point of a source
area (S); means (73) for specifying a transfer start point of a destination area (D);
means (61) for holding amounts of data to be transferred in a horizontal direction;
means (63) for holding amounts of data to be transferred in a vertical direction;
and, means (72, 74) for providing the logical transverse width of said source area
(S) and the logical transverse width of said destination area (D) separately, characterized
in that a plurality of data of said source area specified by said means are read out
from said memory unit (4) and are sequentially written into said destination area
(D) so as to achieve transfer of said data between said source and destination areas
(S, D).
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