gnupic: Re: gpasm directives vs. MPASM
Subject:
Re: gpasm directives vs. MPASM
From:
"Vinod Kanna R" ####@####.####
Date:
7 Dec 2015 08:10:44 -0000
Message-Id: <1449474737.S.4256.23453.f4-235-231.1449475839.31455@webmail.rediffmail.com>
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From: "Molnár ####@####.####
Sent:Mon, 07 Dec 2015 13:22:17 +0530
To: ####@####.####
Subject: Re: gpasm directives vs. MPASM
On Thu, 03 Dec 2015 18:50:18 -0500
> "Andrew E. Mileski" ####@####.#### wrote:
>
> > On 2015-12-03 03:25, Molnár Károly wrote:
> > > On Mon, 30 Nov 2015 15:22:26 -0500
> > > "Andrew E. Mileski" ####@####.#### wrote:
> > >>
> > >> I would expect IDLOCS to be treated like any other section label when
> > >> --mpasm-compatible is specified.
> > >
> > > The gpasm works a little differently.
> >
> > That's my point though. I'd expect it be source compatible with --mpasm-compatible
> >
> > If that's not a goal, then I'll just quietly disappear.
> >
> > > So in your case so that should be used:
> > >
> > > LIST p=16f1829
> > >
> > > __IDLOCS H'048C'
> > >
> > > END
> > >
> > > The compiler will do this:
> > >
> > > 0x8000: 0x0C
> > > 0x8001: 0x08
> > > 0x8002: 0x04
> > > 0x8003: 0x00
> > >
> > > That is, a single 16-bit value stored in four 4-bit part. This is a hardware limitation.
> > > Therefore the __IDLOCS directive can be used only once in the 12-bit and 14-bit devices.
> > >
> > > See: http://ww1.microchip.com/downloads/en/DeviceDoc/40001440E.pdf, page 51
> >
> > Erm... I can find no mention of a 4 bit limitation per location for this processor.
> >
> > Excerpt from DS41390D
> > http://ww1.microchip.com/downloads/en/DeviceDoc/41390D.pdf
> >
> > "3.1 User ID Location
> >
> > A user may store identification information (user ID) in four designated
> > locations. The user ID locations are mapped to 8000h-8003h. Each location is 14
> > bits in length. Code protection has no effect on these memory locations. Each
> > location may be read with code protection enabled or disabled."
> >
> > ~~ Andrew E. Mileski
> >
>
> These the new versions, please give it a try:
> http://sourceforge.net/projects/gputils/files/snapshot_builds/src/gputils-src-20151206-1161.tar.gz/download
> http://sourceforge.net/projects/gputils/files/snapshot_builds/i686-mingw32msvc/gputils-20151206-1161-setup.exe/download
>
> Károly
>
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