I've been playing CF card bingo recently. I have a few machines I've been trying to swap CF cards between. One small revelation I encountered last night was that a 128MB CF card that I had installed from floppies on a Socket 7 motherboard (ASUS P55T2P4 v3.0) would boot fine in that machine, but if I moved it to a Socket 370 (Intel D815EPVF or something) with a Celeron 1GHz, I got a "Missing operating system" message. I can boot from an MSDOS 6.2 floppy and then C: to the CF drive, but it refuses to boot. I tried multiple combinations of IDE configurations in the BIOS settings. I then tried a 512MB CF card in the default-configured-bios on the Socket 370 board, and re-installed MS-DOS 6.2 from floppies locally and *that* booted there. I then tried the prepared 512MB CF card back in the Socket 7 motherboard, and I got a "Missing operating system" message there ... when the bios was configured for LBA! If I switched the BIOS settings on the Socket 7 motherboard to "NORMAL" (by which I assume it means CHS), the 512MB CF card booted fine. I have been unable to find a BIOS configuration on the Socket 370 that lets the, apparently LBA formatted 128MB CF card to boot on it.