system interrupt handler programming on a PC under windows

[Adrien Plisson <aplisson-news@stochastique.net>]

hello everyone !

i wonder if anyone can explain me (or give me a pointer to an explanation) how 
i can set up an interrupt handler under windows to interact with a PCI board 
plugged into my computer.

in my company we are using a PCI I/O board which is only programmable through 
the use of a library available only for C, VB and Pascal. i would like to 
interract with this board from Ada, but writing a thin binding over the library 
does not lead to anything useful. so i would like to create a really thick 
binding by interacting directly with the board.

this board is very well documented: i have all the interresting values address 
expressed in term of BASE address + offset and all seems ok for me to read or 
write them (or they wouldn't have documented this).

but i need to set up an interrupt handler to get notified of events. i started 
using Ada.Interrupts but discovered that the I/O board interrupt is reserved so 
i can't register my own interrupt handler.

so, how can I override the default handler ? is it safe to do it ? what about 
shared interrupts ? in short, i want to know everything you can tell me about 
system interrupt handling from Ada...

thanks in advance.

-- 
rien