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authorGene Cumm <gene.cumm@gmail.com>2011-03-29 18:35:18 -0400
committerGene Cumm <gene.cumm@gmail.com>2011-03-29 18:35:18 -0400
commit7ec04896dca40c6606b4293e5c8e7bf34265e51b (patch)
treece00b7a37a883e587e75ab6c7de6cdc2117c5e87 /diag
parent49d14342f82c1c1555f09733c49533678954b1d8 (diff)
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diag/geodsp/README: Additional use notes
Diffstat (limited to 'diag')
-rw-r--r--diag/geodsp/README6
1 files changed, 6 insertions, 0 deletions
diff --git a/diag/geodsp/README b/diag/geodsp/README
index 43a3edc2..55e08438 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
+