Re: Re[2]: PCI Interrupts

[henrylau@cts.com (Henry Lau)]

At 12:10 AM 10/2/96 -0700, John R Pierce wrote:
>Henry Lau <henrylau@cts.com> wrote...
>> 
>> At 06:51 PM 9/30/96 EST, mrose@nectech.com wrote:
>> >     Henry,
>> >     
>> >     Now, if the Routing register(s), the ELCR, and the Intline registers 
>> >     are all setup, when the appropriate channel is unmasked (21h/A1h) and 
>> >     the PCI asserts its INTA line, the interrupt assigned in the Intline 
>> >     register should fire. Getting called from VPIC services is another 
>> >     matter.
>> >     
>> What do you mean by the VPIC services?  Virtual Programmable Interrupt
>> Controller?  How can I find out if VPIC services is setup properly?
>
>VPICD refers to the Virtual PIC device of windows/windows95.  It has a whole
>API, but normally windows applications layer software should just be able to
>use the SetInterruptVector calls to hook the desired interrupt, and unmask the
>appropriate IRQ.  If you have access to the Windows  3.x or Windows95 DDK
>(device driver kit), I'd suggest you look at the IRQ code in some of the sample
>drivers.
>
>If your application/driver/whatever isn't running under windows, then you can
>ignore this.  I'm afraid I don't remember the original context of your device
>driver or interrupt handler.  If your device IS running under windows95, you
>probably are going to want/need to write a 'virtual device driver' for it (aka
>a VxD) as handling IRQ's in ring 3 (application mode) is rather fraught with
>peril and overhead.
>
The origin of this mail is that I am writing some code to test out the
interrupt generation of a WAN PCI adapter card.  I am writing the program
using Phar Lap Extender and Microsoft Visual C compiler but it is a
command line program running from the DOS Prompt under Windows/95.

Does the VPIC services still apply in this case?

Thank you
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