Date: Wed, 2 Dec 1998 11:19:03 -0500 (EST) From: zhihuizhang <bf20761@binghamton.edu> To: hackers <freebsd-hackers@FreeBSD.ORG> Subject: Interrupt handler and interrupt unit? Message-ID: <Pine.SOL.L3.93.981202110449.23068A-100000@bingsun2>
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In the source code isa.c, I find the definition of intr_unit[]. I have no idea what is an interrupt unit and how it is used. Maybe it refers to one of several device units connected by a single controller and that controller is assigned one IRQ by OS or hardware jumpers? Also, I want to know what specific information is passed to the system when an interrupt occurs. I read in a book on device driver, it only says this is OS and hardware dependent. I hope someone can give me enlightment on the above two points. Thanks a lot. -------------------------------------------------- | Zhihui Zhang, http://cs.binghamton.edu/~zzhang | | Dept. of Computer Science, SUNY at Binghamton | -------------------------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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