From: John_J_Cupak@raytheon.com (John Cupak)
Subject: Re: Help with Copying Shared Memory to Local
Date: 28 May 2002 10:52:51 -0700
Date: 2002-05-28T17:52:51+00:00 [thread overview]
Message-ID: <c7990eda.0205280952.104ba8cf@posting.google.com> (raw)
In-Reply-To: hoWH8.4604$jv5.1045024@typhoon.ne.ipsvc.net
"John Cupak" <Jcupak744@attbi.com> wrote in message news:<hoWH8.4604$jv5.1045024@typhoon.ne.ipsvc.net>...
> Jeffry, et al,
>
> As this is Memorial Day weekend, and I'm not at work, I can't ask the person
> who brought this problem
> to my attention just what processor they're using. But, I suspect that this
> is a very restricted embedded
> processor/system and that the timing/chip/etc problem is VERY applicable to
> the solution here.
>
> When I get into work on Tuesday, I'll ask for hardware details - something I
> (a poor software engineer)
> forgot to do when presented with the problem.
>
> John
Well, I talked to the programmer who posed this problem to me, and he
said that the computer hardware is "Standard VME", but that the shared
memory card is old, poorly-documented, and "home-brewed". He promised
to get me what information he can on the memory card in a day or so.
He also mentioned when he created two byte arrays and mapped them to
the shared and local memory, the compiler would NOT let him write
A:=B, but he COULD write A(I):=B(I), where the index, I, was a
double-byte index. I suspect there's some 16-bit addressing / transfer
going on at the hardware board level.
We'll know more in a day or two.
John
next prev parent reply other threads:[~2002-05-28 17:52 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-05-23 13:50 Help with Copying Shared Memory to Local John Cupak
2002-05-23 20:32 ` Jeffrey Carter
2002-05-23 21:18 ` John Cupak
2002-05-24 1:37 ` Randy Brukardt
2002-05-24 2:08 ` Jeffrey Carter
2002-05-24 17:05 ` John R. Strohm
2002-05-24 16:55 ` Stephen Leake
2002-05-24 20:43 ` John R. Strohm
2002-05-24 19:49 ` Pat Rogers
2002-05-24 23:23 ` martin.m.dowie
2002-05-24 20:54 ` Stephen Leake
2002-05-24 19:41 ` Jeffrey Carter
2002-05-26 0:55 ` John Cupak
2002-05-28 17:52 ` John Cupak [this message]
2002-05-25 11:23 ` Robert Dewar
2002-05-26 4:48 ` Jeffrey Carter
-- strict thread matches above, loose matches on Subject: below --
2002-05-24 14:22 Beard, Frank [Contractor]
2002-05-24 19:30 ` Jeffrey Carter
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