diff -Naur linux-0.01-rm-1.1/include/linux/config.h linux-0.01-rm-1.2/include/linux/config.h
--- linux-0.01-rm-1.1/include/linux/config.h	2007-11-13 19:44:37.000000000 +0100
+++ linux-0.01-rm-1.2/include/linux/config.h	2007-11-13 20:34:05.000000000 +0100
@@ -9,13 +9,7 @@
  * Don't make this bigger without making sure that there are enough page
  * directory entries (boot/head.s)
  */
-#if	defined(LINUS_HD)
 #define HIGH_MEMORY (0x800000)
-#elif	defined(LASU_HD)
-#define HIGH_MEMORY (0x400000)
-#else
-#error "must define hd"
-#endif
 
 /* End of buffer memory. Must be 0xA0000, or > 0x100000, 4096-byte aligned */
 #if (HIGH_MEMORY>=0x600000)
@@ -25,13 +19,7 @@
 #endif
 
 /* Root device at bootup. */
-#if	defined(LINUS_HD)
-#define ROOT_DEV 0x306
-#elif	defined(LASU_HD)
-#define ROOT_DEV 0x302
-#else
-#error "must define HD"
-#endif
+#define ROOT_DEV 0x301
 
 /*
  * HD type. If 2, put 2 structures with a comma. If just 1, put
@@ -42,12 +30,7 @@
  * more than 8 heads, but that is what the bios-listings seem to imply. I
  * just love not having a manual.
  */
-#if	defined(LASU_HD)
-#define HD_TYPE { 7,35,915,65536,920,0 }
-#elif	defined(LINUS_HD)
-#define HD_TYPE { 5,17,980,300,980,0 },{ 5,17,980,300,980,0 }
-#else
-#error "must define a hard-disk type"
-#endif
+
+#define HD_TYPE { 4,20,1024,0,4,0 }
 
 #endif
diff -Naur linux-0.01-rm-1.1/include/linux/hdreg.h linux-0.01-rm-1.2/include/linux/hdreg.h
--- linux-0.01-rm-1.1/include/linux/hdreg.h	2007-11-13 19:44:37.000000000 +0100
+++ linux-0.01-rm-1.2/include/linux/hdreg.h	2007-11-13 20:34:14.000000000 +0100
@@ -14,24 +14,12 @@
  * but easier. We don't use BIOS for anything else, why should
  * we get HD-type from it? Get these values from Reference Guide.
  */
-
-#if HARD_DISK_TYPE == 17
-#define _CYL	977
-#define _HEAD	5
-#define __WPCOM	300
-#define _LZONE	977
-#define _SECT	17
-#define _CTL	0
-#elif HARD_DISK_TYPE == 18
-#define _CYL	977
-#define _HEAD	7
-#define __WPCOM	(-1)
-#define _LZONE	977
-#define _SECT	17
+#define _CYL	1024
+#define _HEAD	4
+#define __WPCOM	(-1)		/*not used ?*/
+#define _LZONE	1024		/*same as _CYL ?*/
+#define _SECT	20
 #define _CTL	0
-#else
-#error Define HARD_DISK_TYPE and parameters, add your own entries as well
-#endif
 
 /* Controller wants just wp-com/4 */
 #if __WPCOM >= 0
@@ -55,14 +43,14 @@
 #define HD_CMD		0x3f6
 
 /* Bits of HD_STATUS */
-#define ERR_STAT	0x01
-#define INDEX_STAT	0x02
-#define ECC_STAT	0x04	/* Corrected error */
-#define DRQ_STAT	0x08
-#define SEEK_STAT	0x10
-#define WRERR_STAT	0x20
-#define READY_STAT	0x40
-#define BUSY_STAT	0x80
+#define ERR_STAT	0x01	/*0 => no error */
+#define INDEX_STAT	0x02	/*not used in new controller*/
+#define ECC_STAT	0x04	/*1 => Corrected error */
+#define DRQ_STAT	0x08	/*0=> controller not waiting for data. 1 => waiting*/
+#define SEEK_STAT	0x10	/*0=> searching. 1=> end of search. waiting for read or write*/
+#define WRERR_STAT	0x20	/*1=> write error.*/
+#define READY_STAT	0x40	/*1=> ready*/
+#define BUSY_STAT	0x80	/*1 => busy*/
 
 /* Values for HD_COMMAND */
 #define WIN_RESTORE		0x10
@@ -78,7 +66,7 @@
 /* Bits for HD_ERROR */
 #define MARK_ERR	0x01	/* Bad address mark ? */
 #define TRK0_ERR	0x02	/* couldn't find track 0 */
-#define ABRT_ERR	0x04	/* ? */
+#define ABRT_ERR	0x04	/* command stopped */
 #define ID_ERR		0x10	/* ? */
 #define ECC_ERR		0x40	/* ? */
 #define	BBD_ERR		0x80	/* ? */
diff -Naur linux-0.01-rm-1.1/kernel/hd.c linux-0.01-rm-1.2/kernel/hd.c
--- linux-0.01-rm-1.1/kernel/hd.c	2007-11-13 19:44:37.000000000 +0100
+++ linux-0.01-rm-1.2/kernel/hd.c	2007-11-25 21:40:07.000000000 +0100
@@ -192,7 +192,7 @@
 	outb_p(sect,++port);
 	outb_p(cyl,++port);
 	outb_p(cyl>>8,++port);
-	outb_p(0xA0|(drive<<4)|head,++port);
+	outb_p(0xB0|(drive<<4)|head,++port);
 	outb(cmd,++port);
 }
 
diff -Naur linux-0.01-rm-1.1/Makefile linux-0.01-rm-1.2/Makefile
--- linux-0.01-rm-1.1/Makefile	2007-11-25 22:15:34.000000000 +0100
+++ linux-0.01-rm-1.2/Makefile	2007-11-25 22:15:42.000000000 +0100
@@ -62,7 +62,7 @@
 
 boot/boot:	boot/boot.s tools/system
 	(echo -n "SYSSIZE = (";ls -l tools/system | grep system \
-		| cut -c25-31 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s
+		| cut -c31-37 | tr '\012' ' '; echo "+ 15 ) / 16") > tmp.s
 	cat boot/boot.s >> tmp.s
 	$(AS86) -o boot/boot.o tmp.s
 	rm -f tmp.s