[syslinux:master] diag/geodsp: Update README with a sample

[syslinux-bot for Gene Cumm]

Commit-ID:  9efca14a13d535551a8e5f5e7475b77b6a2c166e
Gitweb:     http://www.syslinux.org/commit/9efca14a13d535551a8e5f5e7475b77b6a2c166e
Author:     Gene Cumm <gene.cumm at gmail.com>
AuthorDate: Sun, 15 Feb 2015 11:01:20 -0500
Committer:  Gene Cumm <gene.cumm at gmail.com>
CommitDate: Sun, 15 Feb 2015 11:01:20 -0500

diag/geodsp: Update README with a sample

Signed-off-by: Gene Cumm <gene.cumm at gmail.com>

---
 diag/geodsp/README | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/diag/geodsp/README b/diag/geodsp/README
index 9129b69..4539106 100644
--- a/diag/geodsp/README
+++ b/diag/geodsp/README
@@ -27,3 +27,27 @@ majority of the BIOS parameter block).
 	dd bs=1 skip=3 count=87 if=/dev/fd0 of=fd0.bpb
 	dd conv=notrunc if=geodspms.img of=/dev/fd0
 	dd conv=notrunc bs=1 seek=3 count=87 if=fd0.bpb of=/dev/fd0
+
+
+Sample output:
+
+	CHS 0081,FE,3F
+	@CHS 0000,01,01:0000003F
+	@CHS 0001,00,01:00003EC1
+	@EDD 0000003F:0000003E
+	@EDD 00003EC1:00003EC1
+	D=EDD
+	end
+
+The first line is the interpreted geometry per INT 13h AH=08h,DI=00h (in
+hex).  The second line is the data value at the sector CHS 0,1,1
+(indicating effective sectors per track).  The third line is the data
+value at CHS 1,0,1 (indicating effective heads per head count).  The
+fourth line indicates the value read at LBA 63.  The fifth line
+indicates the value read at LBA 16065.  The sixth line indicates the
+final expected mode.
+
+Images created by the Perl variant up to and including 6.03 are off by
+one and shifted by one byte.  In the above, the second line might read
+"00003E00" instead of "0000003F".
+