Embodiments of the instant invention relate to a system for maintaining the integrity of data transfers in shared memory configuration by different processes to a data buffer located in the contiguous memory locations. The accesses by the different processes can be at the same time. One embodiment employs a CISC CPU and a peripheral using a Direct Memory Access (DMA) controller, both of which have an 8-bit data busses. The Memory Interface is provided with a sequencer and registers coupled to a Random Access Memory (RAM). The sequencer controls read and write operations of the RAM and ensures atomic transfer of multiple bytes to the RAM by one process invoking a special mode. This ensures that the other processes either read the old set of data or the new set of data with a minimum delay.