before last commits it work with that commandline (but i don't know when it's broke)
mess pc1512hd20 -bios v2 -isa1 hdc -hard1 "s:\emulat\mess\PC1512HD20 - Tandon TM-262.chd" -skip_gameinfo -window
i have install DOS and DOS+ on the same chd that i can choose at boot like real pc1512 with F1 and F2
