6.1 RC1: won't boot install CD "BTX halted" on HP D530c with SATA drive

I can't get the 6.1-RC1 i386 disc1 CD to boot on an HP D530c.
A websearch of other "BTX halted" messages doesn't get me any
hits on the CD itself not booting into the install.  I get
the menu, but no matter which option I choose I get an immediate
halt with the following details.  What information do I need to 
supply?

*****

\
int=0000000d  err=00000000  efl=00010006  eip=00027c3e
eax=00027c38  ebx=00000000  ecx=00000000  edx=00000000
esi=00000200  edi=0006d810  ebp=00094878  esp=0009e848
cs=0008  ds=0010  es=0010    fs=0010  gs=0010  ss=0010
cs:eip=0f 32 0d 00 01 00 00 0f-30 0f 20 e0 83 c8 30 0f
        22 e0 b8 00 f0 03 00 0f-22 d8 0f 20 c0 0d 00 00
ss:esp=69 95 00 00 00 90 d9 00-00 a0 d9 00 00 10 04 00
        00 00 00 00 00 00 04 00-00 00 00 00 00 90 d9 00
BTX halted

*****

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stu