diff --git a/sys/dev/si/sireg.h b/sys/dev/si/sireg.h
index aea05845da7..4697a7fe236 100644
--- a/sys/dev/si/sireg.h
+++ b/sys/dev/si/sireg.h
@@ -30,7 +30,7 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  * NO EVENT SHALL THE AUTHORS BE LIABLE.
  *
- *	$Id: sireg.h,v 1.5 1998/02/15 14:42:33 peter Exp $
+ *	$Id: sireg.h,v 1.6 1998/03/23 16:27:40 peter Exp $
  */
 
 /*
@@ -86,7 +86,7 @@
  * RAMSIZE is value to use when probing
  */
 #define SIJETPCI_MEMSIZE	0x10000
-#define SIJETISA_MEMSIZE	0x10000
+#define SIJETISA_MEMSIZE	0x8000
 #define SIJET_RAMSIZE		0x7000
 #define	SIHOST_MEMSIZE		0x10000
 #define	SIHOST_RAMSIZE		0x8000
diff --git a/sys/i386/isa/sireg.h b/sys/i386/isa/sireg.h
index aea05845da7..4697a7fe236 100644
--- a/sys/i386/isa/sireg.h
+++ b/sys/i386/isa/sireg.h
@@ -30,7 +30,7 @@
  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
  * NO EVENT SHALL THE AUTHORS BE LIABLE.
  *
- *	$Id: sireg.h,v 1.5 1998/02/15 14:42:33 peter Exp $
+ *	$Id: sireg.h,v 1.6 1998/03/23 16:27:40 peter Exp $
  */
 
 /*
@@ -86,7 +86,7 @@
  * RAMSIZE is value to use when probing
  */
 #define SIJETPCI_MEMSIZE	0x10000
-#define SIJETISA_MEMSIZE	0x10000
+#define SIJETISA_MEMSIZE	0x8000
 #define SIJET_RAMSIZE		0x7000
 #define	SIHOST_MEMSIZE		0x10000
 #define	SIHOST_RAMSIZE		0x8000