[syslinux] Updating BIOS with pxe syslinux memdisk & DOS problems

H. Peter Anvin hpa at zytor.com
Fri Sep 12 11:16:08 PDT 2003


James Courtier-Dutton wrote:
>>
> There are several reasons why phlash.exe might not be working correctly.
> 1) One reason might be the DOS version. DOS 6.22 might work, but WIN98 
> DOS might not. WIN98 DOS handles result codes from DOS calls differently 
> than DOS 6.22, and this might be confusing phlash.exe.
> 
> 2) I have not looked at exactly how memdisk works, but I assume it tries 
> to trick DOS into thinking there is an extra disk present.
> Maybe this simulation is not perfect.
> 
> This is all just theory, as I have not looked at the source code, but 
> maybe worth considering.
> 

It's not really a theory.  It's an enumeration of things that might 
contribute.

Using Win98 DOS is *known* to cause problems, because bugs in Win98 DOS 
that trigger for MEMDISK (as well as several other combinations of things.)

	-hpa




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