[syslinux] Sysinux 6 will not boot ISOs on BIOS (i.e. pre-UEFI) systems

[عبدالخالق]

-----Original Message-----
From: Syslinux [mailto:syslinux-bounces at zytor.com] On Behalf Of H. Peter
Anvin
Sent: Tuesday, November 26, 2013 7:15 AM
To: For discussion of Syslinux and tftp-hpa
Subject: Re: [syslinux] Sysinux 6 will not boot ISOs on BIOS (i.e. pre-UEFI)
systems

On 11/25/2013 06:32 PM, H. Peter Anvin wrote:
> On 11/25/2013 04:12 PM, Gerardo Exequiel Pozzi wrote:
>>
>> I made some more and more experiments beyond LBA 65535
>>
>> Works: * isolinux-4.07.bin (size 24574) * isolinux-5.00.bin (size
>> 34816)
>>
>> Does not work: * isolinux-5.01.bin (size 34816) * isolinux-5.10.bin 
>> (size 36864) * isolinux-6.00.bin (size 38912) * isolinux-6.02.bin 
>> (size 43008)
>>
>> * I just tested exactly at LBA 65535 (works all versions) and LBA
>> 65536 (fails all versions > 5.00).
>>
> 
> What the heck... there are just about zero plausible differences 
> between 5.00 and 5.01.
> 
> I'm wondering if 17a36e2c91706512e6c425222c9a9a451d9db854 could 
> plausibly have anything to do with this, since that seems to be the 
> only possible patch that might affect isolinux.  Is there any way you 
> could try 5.01-pre1 and 5.01-pre2?  If -pre1 works and -pre2 doesn't, 
> it is likely that the problem lies in that commit.
> 

If you have the ability to rebuild Syslinux from source, perhaps you could
try the following patch?

	-hpa