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- Newsgroups: comp.os.msdos.programmer
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!usc!cs.utexas.edu!torn!utzoo!telly!druid!darcy
- From: darcy@druid.uucp (D'Arcy J.M. Cain)
- Subject: Re: Relationship between IRQ's & INT's ?
- Message-ID: <1993Jan2.003007.26096@druid.uucp>
- Date: Sat, 2 Jan 1993 00:30:07 GMT
- References: <C02IqK.11E@dutiws.twi.tudelft.nl> <30DEC199211564476@erich.triumf.ca>
- Organization: D'Arcy Cain Consulting
- Lines: 14
-
- bomr@erich.triumf.ca (Rod Nussbaumer) writes:
- >there is the possibility of intercepting the software interrupt service
- >routine invoked by a hardware interrupt, since the CPU INTerrupts are mapped
- >one-to-one to IRQ's.
-
- And the relationship is IRQ x is handled by INT (x + 8). For example,
- the first COM port triggers IRQ 4 and this can be handled by hooking
- into INT 12 (0x0c)
-
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- D'Arcy J.M. Cain (darcy@druid.com) |
- D'Arcy Cain Consulting | There's no government
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