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From: Warner Losh <imp@FreeBSD.org>
Date: Thu, 10 Mar 2016 00:36:38 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r296590 - in head/sys: dev/fdc sys
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Author: imp
Date: Thu Mar 10 00:36:38 2016
New Revision: 296590
URL: https://svnweb.freebsd.org/changeset/base/296590

Log:
  Add raw RX-50 support. These are 400k single sided disks with 80
  tracks and 10 sectors per track. More exotic RX-50 types not
  supported, nor is there support for de-interleaving the first two
  tracks where the physical sectors are 0 1 2 3 4 5 6 7 8 9, but they
  should be interpreted as 0 5 1 6 2 7 3 8 4 9. This is purely to read
  the media with dd. The FAT that's on these disks won't work with
  msdosfs anyway.

Modified:
  head/sys/dev/fdc/fdc.c
  head/sys/sys/fdcio.h

Modified: head/sys/dev/fdc/fdc.c
==============================================================================
--- head/sys/dev/fdc/fdc.c	Thu Mar 10 00:33:06 2016	(r296589)
+++ head/sys/dev/fdc/fdc.c	Thu Mar 10 00:36:38 2016	(r296590)
@@ -155,6 +155,7 @@ static struct fd_type fd_searchlist_12m[
 	{ FDF_5_1230 | FL_AUTO },
 #else
 	{ FDF_5_1200 | FL_AUTO },
+	{ FDF_5_400 | FL_AUTO },
 	{ FDF_5_360 | FL_2STEP | FL_AUTO},
 #endif
 	{ 0 }

Modified: head/sys/sys/fdcio.h
==============================================================================
--- head/sys/sys/fdcio.h	Thu Mar 10 00:33:06 2016	(r296589)
+++ head/sys/sys/fdcio.h	Thu Mar 10 00:36:38 2016	(r296590)
@@ -209,6 +209,7 @@ enum fd_drivetype {
 #define FDF_5_800  10,2,0xFF,0x10,80,0,FDC_300KBPS,2,0x2e,1,0,FL_MFM
 #define FDF_5_720   9,2,0xFF,0x20,80,0,FDC_300KBPS,2,0x50,1,0,FL_MFM
 #define FDF_5_640   8,2,0xFF,0x2A,80,0,FDC_300KBPS,2,0x50,1,0,FL_MFM
+#define FDF_5_400  10,2,0xFF,0x10,80,0,FDC_300KBPS,1,0x2e,1,0,FL_MFM /* RX50 */
 #define FDF_5_360   9,2,0xFF,0x23,40,0,FDC_300KBPS,2,0x50,1,0,FL_MFM
 /* XXX:                      0x2a ? */
 #endif