heres a debug script. You have to boot to a command promt with a boot floopy then run this script.
-F 220 L1000 0 (ENTER)
-A CS: 100 (ENTER)
xxxx:0100 MOV AX,301 (ENTER)
xxxx:0103 MOV BX,200 (ENTER)
xxxx:0106 MOV CX,1 (ENTER)
xxxx:0109 MOV DX,80 (ENTER) <---"80" for hd1, "81" for hd2 >
xxxx:010C...