So, I'm still playing with my Mac IIfx. After much goofing around, I've arrived at what seems to be a major impasse.
I currently have two drives in the IIfx - one is an IDE drive connected to the internal SCSI port (via an IDE-to-SCSI adapter), and the other is an old Apple-ROM'd SCSI drive, connected to the "regular" 50-pin port on my JackHammer card. The second drive is being powered by an old gutted SCSI case (so it's not drawing power from the IIfx's power supply).
On the JackHammer drive, I've got Mac OS 7.6, and most of my applications and utilities. On the drive connected to the motherboard, I've installed a clean, fresh OS 7.1.3, and RocketWare. So, here's the problem:
When I have the JackHammer card inserted (whether or not a drive is connected to it), and I try to boot from the mobo-drive (with RocketWare), I get the initial boot process, the Rocket "Whoosh", the system restarts, and after a moment (when the Rocket would normally take over), I get a black screen with a flickering "Sad Mac."
Here's the strange thing - if I remove the JackHammer board, the system (and the Rocket) boot perfectly, from the IDE drive connected to the motherboard.
Any ideas? Maybe I should be investing in one of those ATTO high-speed SCSI cards instead? Are my two coolest NuBus cards destined to clash?