BTX halted

[horn]

I install FreeBSD 5.3 from floppy-diskets. After a choice of loading(default, 
safe_mode) there is a error:
int=0000000e  err=00000000  efl=00010083  eip=000095ca
eax=c101ffb8  ebx=c101ffb0  ecx=ffff8c10  edx=ffffff02
esi=ffffffef  edi=00001952  ebp=c1021d60  esp=c101ffa0
cs=0008  ds=0010  es=0010    fs=0010  gs=0010  ss=0010
cs:eip=ac e8 46 00 00 00 fe c9-74 0c b0 2d 80 f9 08 74
       02 b0 20 aa eb ea fe ca-74 0e b0 0a aa b1 07 b0
ss:esp=10 00 00 00 68 97 00 00-db 91 00 00 00 18 00 00
       ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
BTX halted



On it all stops. What to do?