In demand transfer mode of 8237, the device stops data transfer when
A. a TC (terminal count) is reached
B. an external EOP (active low) is detected
C. the DREQ signal goes inactive
D. all of the mentioned
Answer:A
In demand transfer mode of 8237, the device stops data transfer when
A. a TC (terminal count) is reached B. an external EOP (active low) is detected C. the DREQ signal goes inactive D. all of the mentioned
Explanation: In demand transfer mode, the device continues transfers till a TC is reached or an external EOP is detected or the DREQ signal goes inactive.