IRQ 10 Help

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2 total messages Started by Carl Erikson Wed, 18 Nov 1992 16:20

#778

Author: Carl Erikson
Date: Wed, 18 Nov 1992 16:20

10 lines
975 bytes

Hello netters,
	I have been working on supporting the Soundblaster card without
the Soundblaster Developer's Kit. I know that IRQ's 0-7 are attached
to the software interrupts 08 - 0F (hex). I also know that IRQ 10 is
dependent on IRQ 2. Are there software interrupt locations for IRQ's 8+?
Or do I have to do some detection through the IRQ 2 interrupt to know that
the interrupt is actually an IRQ 10 interrupt? Any help would be greatly
appreciated!

Carl Erikson (cerikson@occs.cs.oberlin.edu)

Re: IRQ 10 Help

#779

Author: Patrick Klos
Date: Wed, 18 Nov 1992 16:26

25 lines
1856 bytes

In article <CERIKSON.92Nov18112038@occs.cs.oberlin.edu> cerikson@occs.cs.oberlin.edu (Carl Erikson) writes:
>From: cerikson@occs.cs.oberlin.edu (Carl Erikson)
>Subject: IRQ 10 Help
>Date: Wed, 18 Nov 1992 16:20:38 GMT
>Hello netters,
>	I have been working on supporting the Soundblaster card without
>the Soundblaster Developer's Kit. I know that IRQ's 0-7 are attached
>to the software interrupts 08 - 0F (hex). I also know that IRQ 10 is
>dependent on IRQ 2. Are there software interrupt locations for IRQ's 8+?
>Or do I have to do some detection through the IRQ 2 interrupt to know that
>the interrupt is actually an IRQ 10 interrupt? Any help would be greatly
>appreciated!
>
>Carl Erikson (cerikson@occs.cs.oberlin.edu)

IRQs 8 thru 15 use interrupt vectors 70H thru 77H respectively.  Remember to 
issue the appropriate EOI command to the secondary controller for the IRQ 
you are using.  Also, you MUST issue an EOI to the primary controller at the 
same time to account for the fact that the secondary interrupt controller is 
cascaded thru IRQ 2 on the primary interrupt controller.
========================================================================
        Patrick Klos                 Internet: klosp@rimail.interlan.com
        Klos Technologies, Inc.      Compuserve: 71521,145
        (603) 424-0138
========================All opinions are my own!========================

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