I've got a history degree, and while I don't really have the academic bent that being a historian requires, there are certainly jobs out there for computer historians. Museums, libraries, and large computer companies all hires historians with various specialties, including computers. Archives of various sorts (academic, museums, corporate, etc) also hire historians, as do universities and colleges. Getting a Ph.D. in history is rather competitive, though. If you are sincerely interested in such a field, I would attempt to apply to a school that offers cross-disciplinary fields, such as Harvard. Failing acceptance into that, I would get a computer science degree from a local school, and then apply to a history program for a master's degree. They'd be more than interested in a candidate with such an unusual background, especially if your collegiate grades are in the B+ - A range. Good luck!
I've got a history degree, and while I don't really have the academic bent that being a historian requires, there are certainly jobs out there for computer historians. Museums, libraries, and large computer companies all hires historians with various specialties, including computers. Archives of various sorts (academic, museums, corporate, etc) also hire historians, as do universities and colleges. Getting a Ph.D. in history is rather competitive, though. If you are sincerely interested in such a field, I would attempt to apply to a school that offers cross-disciplinary fields, such as Harvard. Failing acceptance into that, I would get a computer science degree from a local school, and then apply to a history program for a master's degree. They'd be more than interested in a candidate with such an unusual background, especially if your collegiate grades are in the B+ - A range. Good luck!