[syslinux:master] diag/geodsp/README: Additional use notes

[syslinux-bot for Gene Cumm]

Commit-ID:  7ec04896dca40c6606b4293e5c8e7bf34265e51b
Gitweb:     http://syslinux.zytor.com/commit/7ec04896dca40c6606b4293e5c8e7bf34265e51b
Author:     Gene Cumm <gene.cumm at gmail.com>
AuthorDate: Tue, 29 Mar 2011 18:35:18 -0400
Committer:  Gene Cumm <gene.cumm at gmail.com>
CommitDate: Tue, 29 Mar 2011 18:35:18 -0400

diag/geodsp/README: Additional use notes



---
 diag/geodsp/README |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)

diff --git a/diag/geodsp/README b/diag/geodsp/README
index 43a3edc..55e0843 100644
--- a/diag/geodsp/README
+++ b/diag/geodsp/README
@@ -3,3 +3,9 @@ GeoDsp: Images to display the geometry as the BIOS has choosen to interpret it.
 GeoDsp1S is a one-sector variant containing all code in one sector that is intended to test behavior with a typical MBR/partition table layout.  A partition table should be written after writting an image.
 
 GeoDspMS is a multi sector variant intended to look like Syslinux installed on a file system on the raw device (as opposed to a file system within a partition).
+
+GeoDspMS can also be used to attempt to make the boot sector look like a normal file system's boot sector (ie FAT12/FAT16/FAT32).  In order to do this, you must first save a portion the existing boot sector (the majority of the BIOS parameter block).
+	dd bs=1 skip=3 count=87 if=/dev/sda of=sda.bpb
+	dd conv=notrunc if=geodspms.img of=/dev/sda
+	dd conv=notrunc bs=1 seek=3 count=87 if=sda.bpb of=/dev/sda
+