[ECOS] i386 Memory Size Problem
Mon Nov 24 22:53:00 GMT 2003
There appears to be an issue with the pcmb_misc.c file where it determines to actual amount of extended memory available.
It is reading bytes 0x17 and 0x18 from the CMOS which limits the RAM size to 64MB.
I was trying to find the proper way to find out the memory size, and found the following on the web.
Use BIOS calls:
INT 15h AX=E820h (32-bit CPU only). If this fails...
...use INT 15h AX=E801h. If this fails...
...use INT 15h AH=88h.
Read the extended memory size from CMOS only if all of the BIOS calls listed above fail.
How do I do this with eCos?
I have a large application that I am porting that allocates lots of ram. I need more than 64MB.
Before posting, please read the FAQ: http://sources.redhat.com/fom/ecos
and search the list archive: http://sources.redhat.com/ml/ecos-discuss
More information about the Ecos-discuss