(a) Write the control word need to perform the following : (10) (i) E…

Question

(a) Write the control word need to perform the following : (10)

(i) Enable Channels 0, 3 and Disable Channels 1,2

(ii) Disable rotating priority and extended write, Enable auto load and TC stop.

Write an initialization program to transfer 256 bytes of data from a peripheral to memory starting at 2050H. After the transfer the DMA operation should be terminated.

(b) Explain with neat waveforms Mode 1 operation of 8253. Describe the role of Gate input in this mode. (10)