Escape chars in the prompt of perl5db.pl

Hello, I hope this is the right place to ask this question.

I'm writing a program to communicate with perl debugger. The thing I
found hard to handle is the Escape chars output from the prompt, for
example, on my platform, the "DB<1>" is: 
	"<Esc>[4m  DB<1> <Esc>[24m<Esc>[1m"

My question is: Is it possible to turn off these escape chars in perldb,
without changing perl5db.pl?

Thanks, please Cc me.

-- 
Dasn