Re: idling in the interpreter

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1 total messages Started by Bert Bos Tue, 06 Mar 1990 15:11

#1297

Author: Bert Bos
Date: Tue, 06 Mar 1990 15:11

10 lines
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In article <1990Mar2.022448.9490@usenet.ins.cwru.edu> trier@SCL.CWRU.Edu (Stephen Trier) writes:
>The first
>way, which is the most reliable, is to hook into interrupt 28h, sometimes
>known as the "DOS-Idle" interrupt.  MS-DOS calls this whenever it is waiting
>for some event, like a keystroke.  *Almost* all the MS-DOS functions are
>safe to use at this point.  (I'm not sure which ones aren't.)

According to a book I have (Michael Hyman; Memory resident utilities,
interrupts, and disk management with MS & PC DOS; MIS, 1987) it is
save to use DOS function calls with numbers above 12 at this point.

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