BTX halts installing 5.x

[Don Lewis]

On  2 Dec, Josh Paetzel wrote:
> I'm trying to install FreeBSD on a Dual Pentium Pro 200mhz 512K cache system and I am getting the 
> following error:
> 
> CD Loader 1.01
> 
> Building the boot loader arguements
> Looking up /BOOT/LOADER... Found
> Relocating the loader and the BTX
> Starting the BTX loader
> 
> BTX loader 1.00  BTX version is 1.01
> 
> int=00000005  err=00000000  efl=00019286  eip=0001c8a4
> eax=000000a3  ebx=00000000  ecx=00000000  edx=00000000
> esi=cce65d00  edi=00000000  ebp=00000000  esp=0009407c
> cs=002b  ds=0033  es=0033    fs=0033  gs=0033 ss=0033
> cs:eip=62 6f 6f 74 2e 6e 65 74-69 66 2e 69 70 00 62 6f
>        6f 74 2e 6e 65 74 69 66-2e 6e 65 74 6d 61 73 6b
> ss:esp=00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
>        00 00 00 00 00 00 00 00-00 00 00 00 00 00 00 00
> BTX halted
> 
> I've tried warm booting after this and I get the same results.  I've tried 5.0-RELEASE, 5.0-DP1, 
> 5.1-RELEASE, and three different snapshots, all of which work fine on my other machines, including one 
> other SMP box.  It's also worth noting that 4.8-RELEASE and 4.9-RELEASE install fine on this box.
> 
> I can boot 4.9 and post a dmesg if that would help, but to briefly describe the hardware:
> 
> Intel PR440FX Mainboard
> Dual Pentium Pro 200mhz 512K Cache CPUs
> Adaptec 7880 SCSI controller
> 4.3 gig IBM Wide SCSI-2 Disks
> Intel EtherExpress Pro LAN adapter
> I've tried a couple different video cards, Cirrus Logis and SIS PCI
> 320 Megs of Registered ECC SDRAM

Could this be a result of the switch from emulated floppy bootable CDs
to 'no emulation' bootable CDs that happened with between the 4.x and
5.x branches?

If you can do a "make release" to create you own .iso images, try doing
it with the EMUL_BOOT variable defined, which will generate the .iso
images with the emulated-floppy boot code.