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From: A.Jena@cs.ucl.ac.uk (Ajit Kumar Jena)
Newsgroups: comp.unix.internals
Subject: SOFTWARE Interrupts......
Message-ID: <1677@ucl-cs.uucp>
Date: 28 Jun 91 14:47:32 GMT
Sender: news@cs.ucl.ac.uk
Lines: 16

Hi netters,

I am interested in writing a device driver for the network interface card
that sits on the 80386-based PC BUS. My UNIX version is SCO UNIX386.
When a packet arrives from the network, hardware interrupt is generated on
the IRQ2 line and I have coded the interrupt handler routine "lanintr". My
problem is to pass this data to the user process asynchronously.

I was reading about the SOFTWARE interrupt mechanism of 4.3BSD UNIX. How does
one generate it ? Is it the same as "psignal" system call ?

Please email me your tips, suggestions etc. 

Thanks in advance.

A.Jena@cs.ucl.ac.uk