From: Martin <martin.dowie@btopenworld.com>
Subject: Re: About the F-22 software bug
Date: Sun, 7 Feb 2010 02:11:02 -0800 (PST)
Date: 2010-02-07T02:11:02-08:00 [thread overview]
Message-ID: <fb8da8e4-862a-4fbb-9f5f-3ee3ce9185ae@k41g2000yqm.googlegroups.com> (raw)
In-Reply-To: 60554b4a-e36a-4daa-8c21-9600b30a40a9@m16g2000yqc.googlegroups.com
On Feb 6, 12:12 pm, sjw <simon.j.wri...@mac.com> wrote:
> I agree that at the boundary you need to handle cyclic fixed point.
> Back in the day, the Ferranti name for these was 'standard angle
> format'; the F1600 series was a 24-bit machine, and the most
> significant bit typically represented -180 degrees. Overflow was
> represented by an optional check, so wrap-round was as easy as pie.
SAF16 and SAF32 still in use today!! ;-)
Cheers
-- Martin
next prev parent reply other threads:[~2010-02-07 10:11 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-04 18:46 About the F-22 software bug Pascal Obry
[not found] ` <4YKdnVFQX_suIPbWnZ2dnUVZ_rednZ2d@earthlink.com>
2010-02-05 6:51 ` Hibou57 (Yannick Duchêne)
2010-02-05 8:30 ` Martin
2010-02-05 8:52 ` Ludovic Brenta
2010-02-05 9:02 ` Martin
2010-02-05 10:31 ` Dmitry A. Kazakov
2010-02-05 11:18 ` Martin
2010-02-05 16:50 ` Hibou57 (Yannick Duchêne)
2010-02-05 18:19 ` Dmitry A. Kazakov
2010-02-06 9:28 ` Martin
2010-02-05 23:39 ` Phil Clayton
2010-02-06 12:12 ` sjw
2010-02-07 10:11 ` Martin [this message]
2010-02-06 15:30 ` jonathan
2010-02-06 16:35 ` Pascal Obry
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