Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.os.msdos.programmer > #3996

Re: MSDOS 3.2 COM ports

Show all headers | View raw

Muta,

> I thought all keyboard strokes resulted in
> an interrupt?

Yeah, they do.  A *hardware* one.  Which dumps the keystroke into a small 
buffer which you than read from with a few of the BIOS INTs.

> Isn't it a simple matter of hooking into that interrupt
> and doing the ctrl-c checking?

Yeah, thats a good idea : you just, somewhere in the middle of whatever your 
'puter is busy with - even harddisk writing ! - hard-abort it.   Nope, I 
would not suggest doing that.

>> And just ask yourself : Your BBS listens to your client-programs
>> communications and does whatever it says. How's that independant ?
>
> ctrl-c checking is independent of the application
> being run.

I don't think you understood the question ...

> What's the technical barrier?

I already mentioned that : while you can just have your client program 
crash-and-burn by pressing ctrl-c, it won't stop the server (the BBS) from 
continuing what its busy with.

IOW, you need to figure out a "soft" method to stop whatever your client is 
doing (*not* aborting the program or interrupting it in the middle of 
something important), and than *ask* the server to stop what it busy with - 
'cause thats the only thing you can do : ask..

Regards,
Rudy Wieser

Back to comp.os.msdos.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-23 16:19 -0700
  Re: MSDOS 3.2 COM ports Grant Taylor <gtaylor@tnetconsulting.net> - 2021-04-23 18:26 -0600
    Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-23 18:47 -0700
      Re: MSDOS 3.2 COM ports Grant Taylor <gtaylor@tnetconsulting.net> - 2021-04-23 20:08 -0600
        Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-23 20:40 -0700
      Re: MSDOS 3.2 COM ports Grant Taylor <gtaylor@tnetconsulting.net> - 2021-04-23 20:14 -0600
      Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-04-24 10:07 +0200
        Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-24 15:04 -0700
          Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-04-25 10:32 +0200
            Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-26 01:32 -0700
              Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-04-26 11:42 +0200
                Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-26 04:42 -0700
                Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-04-26 14:54 +0200
                Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-26 14:10 -0700
                Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-04-27 11:40 +0200
                Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-04-27 03:56 -0700
                Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-05-01 21:56 +0200
                Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-05-01 14:36 -0700
                Re: MSDOS 3.2 COM ports "R.Wieser" <address@not.available> - 2021-05-02 10:29 +0200
                Re: MSDOS 3.2 COM ports "muta...@gmail.com" <mutazilah@gmail.com> - 2021-05-02 02:14 -0700
    Re: MSDOS 3.2 COM ports Peter 'Shaggy' Haywood <phaywood@alphalink.com.au> - 2021-04-28 14:15 +1000

csiph-web