Abstract: A data-processing apparatus provided with a bit boundary block transfer unit. A CPU forms a list of parameters required for transferring characters forming one block of text, and stores the list in a memory. A parameter control section of the boundary block transfer unit sequentially reads the parameters, and writes them in a parameter file. Meanwhile, the CPU processes the data. When the block of text has been transferred, an interrupt is supplied to the CPU. The CPU can form a list of only those parameters which must be changed for characters of the same type. These parameters are rewritten as the characters are transferred, one by one. In another data-processing apparatus of the invention, a CPU loads a register with data showing the type of characters to be transferred. It can input a variable parameter to a memory storing fixed parameters.