How can the speed of interrupt driven input output systems be improved?

- Direct memory access is used to enhance the speed of the input output systems.

- Here, buffers, counters and pointers are set for the devices.

- The device controller transfers the block of data directly from own buffer storage to memory.

- The data is not given to the CPU for further transfer between CPU and input output devices or CPU and memory.

- Only one interrupt is generated per block than one interrupt per byte which enhances the speed.