Prev: Printing from MASM (and other droll questions)
Next: DMA
From: Francis Glassborow on 28 Dec 2007 07:15
Andrew Wan wrote:
> I found this excellent High Speed Timer (in Pascal). I compiled it
> (using Turbo Pascal 7 and it runs fine):
>
> http://www.sorucevap.com/bilisimteknolojisi/programcilik/pascal/ders.asp?207995
> and same High Speed Timer here too:
> http://groups.google.com/group/comp.lang.pascal/browse_thread/thread/92e9398f16c10ba4/e67ff3cf587648ef?lnk=st&q=inline(%24CD)+inline(%241C)+inline(%249C)&rnum=1&hl=en#e67ff3cf587648ef
>
> I converted it to C (using p2c), compiled it using Borland C++ 4.5 and
> it runs. But it crashes when it gets to setvect(...) in TimerOn.
>
> Does anyone know how IRQ programming works in C? If you know IRQ timer/
> clock please contact me. I need urgent help in understanding why it's
> not working.


Assuming that what you want is a high resolution timer to time C or C++
code fragments, google 'high resolution timer in C' and start reading.
Note that the solutions are necessarily platform specific.
From: Francis Glassborow on 28 Dec 2007 07:15
Andrew Wan wrote:
> I found this excellent High Speed Timer (in Pascal). I compiled it
> (using Turbo Pascal 7 and it runs fine):
>
> http://www.sorucevap.com/bilisimteknolojisi/programcilik/pascal/ders.asp?207995
> and same High Speed Timer here too:
> http://groups.google.com/group/comp.lang.pascal/browse_thread/thread/92e9398f16c10ba4/e67ff3cf587648ef?lnk=st&q=inline(%24CD)+inline(%241C)+inline(%249C)&rnum=1&hl=en#e67ff3cf587648ef
>
> I converted it to C (using p2c), compiled it using Borland C++ 4.5 and
> it runs. But it crashes when it gets to setvect(...) in TimerOn.
>
> Does anyone know how IRQ programming works in C? If you know IRQ timer/
> clock please contact me. I need urgent help in understanding why it's
> not working.
>
> Below is my translated C code:


What you presented was code that was riddled with warnings from p2c.
IOWs the code was way beyond what it can handle correctly. And a quick
glance at the code shows such things as inline assembler code.

When you say it compiled with Borland C++ 4.5 was that without any
diagnostics? If not, have you taken time to look at them and think how
to resolve them (yes, warnings are not issued just for fun)

I suspect that you know very little about either turbo pascal or C.
However, for the sake of argument, let us suppose I am wrong, why do you
want to translate from Pascal to C a program that is extremely platform
specific? Why not just use the pascal? You might even find that Borland
tools will allow you to mix the two languages.
 | 
Pages: 1
Prev: Printing from MASM (and other droll questions)
Next: DMA