[syslinux] DOCMEMORY 2.0 (simmtester) and MEMDISK

[H. Peter Anvin]

Phillip Remaker wrote:
> Like a lot of people, I am using SYSLINUX + MEMDISK to make a technician
> universal boot disk on a USB key (I have done the same with ISOLINUX and
> MEMDISK for a CD using Bart's method for bootable CDs)
> 
> I *LOVE* Syslinux and MEMDISK, and what I can do with floppy images!
> 
> I have a few problems that have cropped up, most notably the DOCMEMORY
> program (www.simmstester.com) boots fing, but the system hangs when I start
> the memory test (I suspect that since it is encapsulated in an emulation, it
> blithlely overwrites important stuff).  I suspect this is likely a problem
> with DocMemory, but I don't know how to troubleshoot it.  It runs off a
> FreeDOS bootable disk, and is a free download.
> 
> I don't know how docmemory figures out where it shouldn't write, or what
> mechanisms exist to communicate that information, but hopefull people on
> this mailing list will 8-)
> 

What it *SHOULD* use is INT 15h, AX=E820h.

> As an aside, and this is probably a FAQ... it looks like SYSLINUX won't boot
> out of subdirectories.  True?  When I make a kernel name like
> foo/wigdet.img, it can't find image foowidge.tim.  I imaging it hangs hard
> to the 8.3 limits for maximum compatability 8-)

Correct.

	-hpa