Help with isearch

[Ziv . Peer]

Hello,
I'm working with Emacs version 21.1, loading specman-mode.el.
I'm using lots of underscore in my coding (e.g: word1_word2_word3). When
I'm searching with "C-s C-w", the whole string is being highlighted,
including the underscore characters (A single C-s C-w will highlight
"word1_word2_word3").
When working in VHDL mode, C-s C-w will highlight the text untill the next
underscore (first C-w will highlight "word1", the second C-w will highlight
"word1_word2", etc.).
I would like to have the VHDL mode behaviour when working at specman mode.
Is it possible, and if so then what should I set in order to get this
behaviour?

I'd appreciate your kind advice (and I appologize for my poor English)

Best Regards

Ziv Peer

Tel: +972-3-9287193
mailto:zpeer@ecitele.com