CS609 Mid Term Current Paper (Dec 2010)

CS609 Mid Term Current Paper (Dec 2010)

Q (5 marks)

Explain the usage of XON and XOFF is software based flow control
Ans (Page # 158 , lec # 17)

Q 
Write a function that will read the status of COM Port and return the modem line status is a unsigned int. COM port number will be passed as parameter.


Q Write down the purpose of int 12H and int 15H/88H
Ans : int 12H : used for memory interface 
int 15H/88H return = No. of kb above 1 MB


Q
Write down the detail of the Service (00,01,02) of int 17H which is used in printer.

Ans : 00 : Display characters
01 : Initialze Printer
02 : Request printer.



some questions of Another Paper.

Q (2 Marks )
write stands for
THR 
RBR
DLL
DLM 

Q 

write stands for.

DSR 
DTR
RTS
CTS