[syslinux] memtest86 problem

[H. Peter Anvin]

- wrote:
> Hi!
> 
> At first thanks for your great work!
> 
> I started to make multiboot CDs 1,5 years ago, with Bart Lagerweij 's utils. I have a problem with the memtest86 floppy image, made by the authors in the .zip file, downloadable from it's homepage, when I use diskemu. Some days ago I found on Bart's page a new method to select boot images on CD with syslinux/isolinux/memdisk. I thought this is my solution! With LiLo I could start the memtest86 image from hardisk, but with diskemu I couldn't. The error number was 8000, and now it's the same when I tried to boot with isolinux/memdisk. A part of my isolinux.cfg:
> label 5
>     kernel memdisk
>     append initrd=memtest.img
> I read the source of syslinux-1.67 - syslinux-1.75, and the memdisk documentation segment of http://syslinux.zytor.com/ .
> I think, I should to use a memdisk command line option "floppy" (?). How is it correct?
> label 5
>     kernel memdisk
>     append initrd=memtest.img floppy 
> 
> or
> 
> label 5
>     kernel memdisk
>     append floppy initrd=memtest.img  
> 
> or any other?
> 

Either one should work fine; however, assuming memtest.img is 1474560 
bytes in size then the "floppy" is redundant, and if it isn't, you need 
to specify the geometry as well; for example, for Linux 1722K floppies:

	append initrd=memtest.img floppy c=82 h=2 s=21

	-hpa