>I have designed an ISA card for a PC and I am trying to program it in TP7.
>(You may remember a post I made a while ago). I've tested the card, and
>manufactured a final version with a few improvements. I am now writing the
>final software for it.

>The problem I have is with using real numbers. I need to put a count into a
>register on the card (a byte). I need to get a frequency from the user in
>kHz. Then divide this number by 8000000 (The 8MHz reference clock on the
>card) to get the count to put into the register. So the code is something
>like this:

>count:=(8000000/frequency);
>port [$01B0]:=count;

>of course this will not work, becuase count has to be a real number to be
>output to a port. The rest of the code I've written makes sure that
>frequency will divide my 8MHz to generate an integer which will work with
>the register.

>Can anyone help me with the code to convert the count variable in real to
>another variable which is a byte variable??

>If someone can help I would be very grateful,
>Thank you for your time,
>Richard Webb
>ICQ:  10634107

>I have designed an ISA card for a PC and I am trying to program it in TP7.
>(You may remember a post I made a while ago). I've tested the card, and
>manufactured a final version with a few improvements. I am now writing the
>final software for it.

>The problem I have is with using real numbers. I need to put a count into a
>register on the card (a byte). I need to get a frequency from the user in
>kHz. Then divide this number by 8000000 (The 8MHz reference clock on the
>card) to get the count to put into the register. So the code is something
>like this:

>count:=(8000000/frequency);
>port [$01B0]:=count;

>of course this will not work, becuase count has to be a real number to be
>output to a port. The rest of the code I've written makes sure that
>frequency will divide my 8MHz to generate an integer which will work with
>the register.

>>I have designed an ISA card for a PC and I am trying to program it in TP7.
>>(You may remember a post I made a while ago). I've tested the card, and
>>manufactured a final version with a few improvements. I am now writing the
>>final software for it.

>>The problem I have is with using real numbers. I need to put a count into
a
>>register on the card (a byte). I need to get a frequency from the user in
>>kHz. Then divide this number by 8000000 (The 8MHz reference clock on the
>>card) to get the count to put into the register. So the code is something
>>like this:

>>count:=(8000000/frequency);
>>port [$01B0]:=count;

>>of course this will not work, becuase count has to be a real number to be
>>output to a port. The rest of the code I've written makes sure that
>>frequency will divide my 8MHz to generate an integer which will work with
>>the register.

>In this newsgroup, you need to specify the version of Pascal you are
>using.  That fragment looks like Turbo/Borland, for which the right
>group is c.l.p.borland.

>You have the choice of Round and Trunc - see the manuals, or the on-line
>help.  You should validate the user's request for range, since otherwise
>if the input frequency is too small bad things will happen.

>You should not, of course, be using the standard TP/BP real type
>nowadays, except under special circumstances (which you may have) - see
>my pas-real.htm.

>--
>? John Stockton, Surrey, UK.  j...@merlyn.demon.co.uk   Turnpike v4.00
MIME. ?
> <URL: http://www.merlyn.demon.co.uk/> TP/BP/Delphi/&c., FAQqy topics &
links;
> <URL: ftp://garbo.uwasa.fi/pc/link/tsfaqp.zip> Timo Salmi's Turbo Pascal
FAQ;
> <URL: http://www.merlyn.demon.co.uk/clpb-faq.txt> Pedt Scragg: c.l.p.b.