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From: KRW1@Lehigh
Newsgroups: comp.os.msdos.programmer
Subject: RE: Turbo C Interrupt Question
Message-ID: <11109019:22:47KRW1@lehigh.bitnet>
Date: 12 Oct 90 00:22:47 GMT
Lines: 4
To: lusysnz@VAX1.CC.LEHIGH.EDU
X-Envelope-to: lusysnz

You can check the in-service register of the interrupt controller
to see if irq 0 is active.  Output 0bh to port 20h and read it back.
Bit zero will be 1 if the irq 0 is active (other, lower priority bits
may be set as well, so be sure to mask it).  -- Kevin