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From: hthomas@oracle.nl (Huw Lyan Thomas)
Newsgroups: comp.sys.laptops
Subject: Battery-low warning interrupt
Keywords: Low-battery, detecting
Message-ID: <1192@nlsun1.oracle.nl>
Date: 25 Jan 91 19:34:09 GMT
Organization: Oracle Europe
Lines: 13

Does anyone know if there is a general method used to tell laptop software
that the battery is about to die? I disassembled a TSR utility supplied
with my Zeos notebook, which makes the machine beep shortly before the
battery finally gives up, so you get a chance to save your work. This
utility hooks onto the NMI (non-maskable interrupt). Is the NMI used in
this way on other laptops too? If not, how do they do it?

The reason I need to know is I am writing a disk cache, and want to flush
it to disk before the power disappears.

Thanks for any information,

Huw Thomas