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- Path: sparky!uunet!mcsun!news.funet.fi!network.jyu.fi!jybox!otto
- From: otto@jybox.jyu.fi (Otto J. Makela)
- Newsgroups: comp.bbs.waffle
- Subject: Re: "other" interrupts with BNU
- Message-ID: <7L1LuB8w165w@jybox.jyu.fi>
- Date: Sun, 22 Nov 92 00:06:53 EET
- References: <J9VkuB1w165w@arts.com>
- Organization: Jyvaskyla Electronic Mailbox
- Lines: 25
-
- mike@arts.com (Mike Witt) writes:
-
- > mike@arts.com (Mike Witt) writes:
- > > Is there any way I can tell BNU about these parameters,
- >
- > I realized as I read my post, that I didn't really ask what
- > I was trying to ask. I'm TRYING to set the parameters with
- > the BNUPORT utility. I can see how to set the I/O address, but
- > I don't understand how the interrupt "mask" and "vector" relate
- > to the fact that I want to use interrupt 7.
-
- Ah, I see. The vector is what the CPU interrupt number generated
- by the actual hardware interrupt is -- in the case of IRQ7 it is 0Fh
- or 15 in decimal. The mask is the bitmask which you give the 8259A
- interrupt controller chip to enable this particular interrupt -- for
- IRQ7 the mask is 01111111b=7Fh or 127 in decimal. Are you sure the
- BNU manual doesn't explain this?
-
- By the way, are you aware that IRQ7 is also used by the parallel
- port hardware?
-
- /* * * Otto J. Makela <otto@jybox.jyu.fi> * * * * * * * * * * * * * * * */
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