Abstract: According to the invention, a microprocessor computing system comprises at least one data processing device and at least one group of execution control elements; said group constitutes a control level and includes at least one microprogram control device which is a group of first-order control elements. The data processing device incorporates a microinstruction register for holding microinstruction codes, a microoperation decoder, a general-purpose register unit for holding operands, an arithmetic/logic unit, a temporary result storage register, a result status register, and at least one data exchange unit having a multichannel communication line to provide for data exchange between other sources and destinations. The microprogram control device producing parallel microinstruction codes incorporates at least one input register, a programmable address unit, a microinstruction storage unit, a feedback register, a microinstruction register, and an output driver unit.