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

Groups > comp.sys.acorn.programmer > #2065

Re: Unsigned integer comparison in Basic V

Show all headers | View raw

The following bytes were arranged on 10 Aug 2012 by jgh@arcade.demon.co.uk:

> Martin Bazley wrote:
> > By the way, if you want to compare two numbers of more than 32 bits each
> > (such as, say, 40-bit datestamps), you could try the following
> > (completely untested!) extension:
>
> As they're 40-bit they're going to be in memory anyway, so just
> deal with them in memory (untested):

Not necessarily; the usual case is reading load and exec addresses via
OS_File, where the datestamp is returned in two separate registers (one
of which also contains the filetype).  From a purely academic viewpoint
it's faster not to have to save them to memory and then load them back
again, although since the OP is using BASIC I don't suppose he's too
worried about that.

-- 
  __<^>__   "Did you know that polar bears stay white all year round? ...The
 / _   _ \  white colour makes them less visible to the seals and penguins
( ( |_| ) ) they hunt."  - Nelson Thornes AQA-endorsed GCSE science textbook
 \_>   <_/  ======================= Martin Bazley ==========================

Back to comp.sys.acorn.programmer | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

Unsigned integer comparison in Basic V Richard Porter <dontusethis@address.uk.invalid> - 2012-08-09 18:06 +0100
  Re: Unsigned integer comparison in Basic V Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-08-09 23:56 +0100
    Re: Unsigned integer comparison in Basic V Richard Porter <dontusethis@address.uk.invalid> - 2012-08-10 12:12 +0100
      Re: Unsigned integer comparison in Basic V "Ste (news)" <steve@revi11.plus.com> - 2012-08-10 14:10 +0100
        Re: Unsigned integer comparison in Basic V Jeremy Nicoll - news posts <jn.nntp.scrap007@wingsandbeaks.org.uk> - 2012-08-10 14:58 +0100
          Re: Unsigned integer comparison in Basic V "Ste (news)" <steve@revi11.plus.com> - 2012-08-13 16:14 +0100
        Re: Unsigned integer comparison in Basic V Steve Drain <steve@kappa.me.uk> - 2012-08-10 16:11 +0100
      Re: Unsigned integer comparison in?Basic V Justin Fletcher <gerph@gerph.org> - 2012-08-10 15:25 +0100
    Re: Unsigned integer comparison in Basic V jgh@arcade.demon.co.uk - 2012-08-10 15:49 -0700
      Re: Unsigned integer comparison in Basic V Martin Bazley <martin.bazley@blueyonder.co.uk> - 2012-08-11 19:44 +0100
      Re: Unsigned integer comparison in Basic V Richard Porter <dontusethis@address.uk.invalid> - 2012-08-13 16:19 +0100

csiph-web