This worked for me in the past:
#include <at89c51ed2.h>
xdata int i, j, k;
unsigned char _sdcc_external_startup(void)
{
//Enable all the built in expanded RAM
AUXR=XRS2; //EXTRAM=0:uses internal xdata. XSR2=1,XSR1=0,XSR0=0:1792 bytes
//Disable the Bootprom
AUXR1&=(~ENBOOT);
return 0;
}
void main (void)
{
.
.
.
}
At 06:23 AM 11/12/2009, you wrote:
>Hi,
>
>Just put it in xdata. But also check in the datasheet if this XRAM
>is enabled by default, otherwise you need to enable it in
>_sdcc_external_startup().
>
>Maarten
>
> > Good morning, everyone
> >
> > I need to use the internal XRAM AT89C51ED2.
> > Can anyone give me guidance on how to set a variable in SDCC for
> it to be allocated in the internal XRAM?
> >
> > Thank you for your attention.
> >
> > SDCC 2.9
>
>
>
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