[syslinux] Changing USB-key geometry from syslinux.exe?

[H. Peter Anvin]

H. Peter Anvin wrote:
> Paolo Salvan wrote:
> 
>> I'm playing with syslinux 3.0x to get PC to boot from USB key...
>>
>> In particular, I'm giving a look at the "ZIP geometry hack" to get 
>> some more
>> BIOS boot working with USB...
>>
>> Some question:
>> - if we have a usbkey with a single partition, can we change the geometry
>> without requiring to reformat the partition? Or is a reformat 
>> unavoidable?
> 
> You can do it by poking the FAT header (and probably the partition 
> table, although SYSLINUX and the SYSLINUX MBR ignores the CHS 
> information in the partition table.)
> 

Oh yes, if someone wants to implement this it should be two fields in 
the boot sector header which needs to be poked.  Would probably be 
faster than wait for me to get a round tuit...

	-hpa