Re: Point a beginner in the right direction? Cheap bare-board to run with a RTOS for running ADA

["Randy Brukardt" <randy@rrsoftware.com>]

"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message 
news:roqq0dhh1do.ckvrzq4256q1$.dlg@40tude.net...
...
> You will need interrupts, you will need tasking you will need real-time
> clock.

You don't need the first to have the second two (Janus/Ada does not support 
interrupts; it was originally designed for MS-DOS which has no tasking nor 
allows any OS reentrancy).

On a single-board computer, you don't really need interrupts because polling 
works just as well (and you have nothing else that the machine might be 
doing, preventing latency problems). [Even on Windows, polling works very 
well with just a tiny bit of care (don't write a long-running loop without 
something that breaks it up); Janus/Ada is careful to use "sleep" when 
nothing is going on.]

> Of course, it would be possible to implement ad-hoc kludges to handle any
> of this. But the result will be so fragile that any small changes in the
> application will require redesigning the "OS". It is simply not the Ada 
> way
> (TM). Not even much the C way any more.

So you're saying that Janus/Ada is too fragile to exist (which is obviously 
false) and for some reason that changing the application (that is the Ada 
code) will require redesigning Janus/Ada (the Ada RTS). It's pretty obvious 
that is not true. :-)

                                 Randy.