It depends on the University you enroll into. About 10 years back, a freind of mine even got able to get admission in the Master Program in Computer Science with the IE degree from Pulchowk Campus. I still have no clue how she managed to do that. Just few years back, she was working as a DBA in IBM.

However, those were the days when students from Nepal just started to pouring into the USA. The same trickery is not possible these days. Please tell me the computer science and mathmatics calsses you have taken in your BS, I can provide you tentative idea. In some universities, I hope you can pursue even Master Program in CS as a conditional graduate student. But, Master in CS is very grueling if you really want to go to its nadir.