Here http://www.msfn.org/...0-and-grub4dos/ I have found an example of grub4dos config file with three parameters to map command. Here is the whole example:
title Microsoft MS-DOS 6.22 (64 MB RAM disk) find --set-root /msdos.img map --ram-drive=0x9f map --rd-base=0x5000000 map --rd-size=0x100000 map (hd0) (hd1) (rd) map (rd) (hd1) (hd0) map --mem --disable-lba-mode --heads=4 --sectors-per-track=35 /msdos.img (hd0) map --floppies=1 map --a20-keep-on=0 map --hook chainloader --disable-a20 (hd0)+1 rootnoverify (hd0) boot
Well, what does it mean if you specify three parameters for map command? Specifically these:
map (hd0) (hd1) (rd) map (rd) (hd1) (hd0)
R.