Re: IO-PORTS (part 2)

Re: IO-PORTS (part 2)

[David C. Hoos, Sr.]

----- Original Message ----- 
From: "Qwerty" <alexanderdupont@yahoo.com>
Newsgroups: comp.lang.ada
To: <comp.lang.ada@ada.eu.org>
Sent: May 15, 2002 2:18 AM
Subject: IO-PORTS (part 2)


<snip>
> 
> The program has to be interrupt-driven. What interrupt_id do I have to 
> use for the COM1-port (I suppose Names.SIGINT ??? What else, because 
> it's not working).
> 
If you uise the DOS interrupts package at
http://users.ncrvnet.nl/gmvdijk/other_os.html#DOSINT
then you use Jerry's interrupt chaining mechanism, and you use whatever
IRQ is assigned to the port you're using.

> 
> How to use the Interrupt_Priority pragma? I mean, you have to write 
> something like: pragma Interrupt_Priority(???).. But I don't really know 
> what to write in the ??? place, even constants like Max_Priority as 
> specified in the Systems package don't compile..
> BTW My PC is an Intel with Windows 98.
>
I wouldn't even bother with interrupt priorities, and in any case, they
don't apply to Jerry's package.
> 

IO-PORTS (part 2)

[Qwerty]

Hi,

Thanks for the help on my first question (see topic IO-PORTS). I already 
have a sort of working prototype but still I have some questions left.

The program has to be interrupt-driven. What interrupt_id do I have to 
use for the COM1-port (I suppose Names.SIGINT ??? What else, because 
it's not working).


How to use the Interrupt_Priority pragma? I mean, you have to write 
something like: pragma Interrupt_Priority(???).. But I don't really know 
what to write in the ??? place, even constants like Max_Priority as 
specified in the Systems package don't compile..


BTW My PC is an Intel with Windows 98.


Any help is welcome,
Alexander