Give this diff a go (v2.0.36pre20, should work v anything recent)
--- arch/i386/mm/init.c.orig Sun Jun 21 18:32:13 1998
+++ arch/i386/mm/init.c Wed Nov 11 17:41:44 1998
@@ -140,6 +140,17 @@
*/
if (!smp_scan_config(639*0x400,0x400)) /* Scan the top 1K of base RAM
*/
smp_scan_config(0xF0000,0x10000); /* Scan the 64K of
bios */
+ /*
+ * If it is an SMP machine we should know now, unless the
+ * configuration is in an EISA/MCA bus machine with an
+ * extended bios data area.
+ *
+ * there is a real-mode segmented pointer pointing to the
+ * 4K EBDA area at 0x40E, calculate and scan it here:
+ */
+ address = *(unsigned short *)phys_to_virt(0x40E);
+ address<<=4;
+ smp_scan_config(address, 0x1000);
}
/*
* If it is an SMP machine we should know now, unless the configuration
