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Member "syslinux-6.03/diag/geodsp/README" (6 Oct 2014, 1286 Bytes) of package /linux/misc/syslinux-6.03.tar.gz:
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side-by-side code changes report for "README": 6.02_vs_6.03
1 GeoDsp: Images to display the geometry as the BIOS has choosen to
2 interpret it. Both images are intended to be written to the first ~8MiB
3 of a raw device (ie /dev/hda, /dev/sda) and be over one large cylinder
4 of 255*63 512-byte sectors in size.
6 To save the existing data for restore later:
8 dd bs=1M iflag=fullblock count=8 if=/dev/sda of=sda.img
10 GeoDsp1S is a one-sector variant containing all code in one sector that
11 is intended to test behavior with a typical MBR/partition table layout.
12 A partition table should be written after writting an image.
14 GeoDspMS is a multi sector variant intended to look like Syslinux
15 installed on a file system on the raw device (as opposed to a file
16 system within a partition).
18 GeoDspMS can also be used to attempt to make the boot sector look like a
19 normal file system's boot sector (ie FAT12/FAT16/FAT32). In order to do
20 this, you must first save a portion the existing boot sector (the
21 majority of the BIOS parameter block).
23 dd bs=1 skip=3 count=87 if=/dev/sda1 of=sda1.bpb
24 dd conv=notrunc if=geodspms.img of=/dev/sda1
25 dd conv=notrunc bs=1 seek=3 count=87 if=sda1.bpb of=/dev/sda1
27 dd bs=1 skip=3 count=87 if=/dev/fd0 of=fd0.bpb
28 dd conv=notrunc if=geodspms.img of=/dev/fd0
29 dd conv=notrunc bs=1 seek=3 count=87 if=fd0.bpb of=/dev/fd0