In a device for controlling the displaying of characters for a video
system, the memory for storing information relating to the displaying of
the characters is partitioned into two areas. The first area (Z1, Z1') is
for storing, at fixed addresses, data and parameters for general control
of the display. The second area (Z2) which is divisible into spaces (B1,
B2, B3) of variable sizes stores, in each of the spaces, control
parameters and data relating to the displaying of a row of characters,
wherein the spaces are chained together by virtue of a parameter, the
address of the next memory space, stored in each space. This memory
architecture offers multiple possibilities for modifying the display
parameters from one row to another within one and the same "screen" whilst
optimizig the size of the memory used.