I agree with Maarten. The XRAM initialization code is always included, but
is not executed at runtime. I suggest to use s51 or any other 8051 simulator
to verify this.
Regards,
Krish
On Sat, Jul 9, 2011 at 10:31 AM, Maarten Brock <sourceforge.br...@dse.nl>wrote:
> Hi Charles,
>
> As Frieder pointed out this code you see is the C
> RunTime initialization. Normally it is always included
> by the linker but will be skipped at runtime as there is
> no xdata used in your program.
>
> If you need to set --iram-size 128 then the simulator
> cannot handle idata above 0x7F. This may be because it
> has the SFR's also mapped in indirect space instead of
> direct space only. crtclear.asm will clear all idata and
> will in this case harm the SFR's. It could also be that
> the simulator treats indirect access above 0x7F as an
> access violation since the original 8051 did not have
> any memory there.
>
> HTH,
> Maarten
>
> > Am 09.07.2011 05:26, schrieb Charles Wilkins:
> > > After some further tinkering I was able to get SDCC generated
> instructions to work with EdSim51 by passing SDCC the following option:
> > > --iram-size 128
> > > I still am curious why, however, MOVX is in the disassembly.
> > > Charles
> >
> >
> > Hi Charles,
> >
> > if you look at the very end of the .map file you find
> > the libraries listed that are linked to your code.
> >
> > The suspects in your case are:
> > [ crtxinit.rel ] and [ crtxclear.rel ]
> >
> > These are documented in the manual at:
> > 3.12.1 MCS51/DS390 Startup Code
> >
> > With the option --no-xinit-opt (which pretty much does what
> > it says if you translate 'x' to "xdata") you can get
> > rid of those MOVX:)
> >
> > Greetings,
> > Frieder
> >
> >
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>
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threats, fraudulent activity, and more. Splunk takes this data and makes
sense of it. IT sense. And common sense.
http://p.sf.net/sfu/splunk-d2d-c2
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