Ok here's the problem. I'm running Pix version 6.3.5, and am trying to upgrade to 7.0.4. When I copy from tftp to flash, it gives me an error about not having enough space in flash. Fine. Looked up the error on Google, Cisco says I have to get to monitor mode by hitting a break sequence before it boots. I should be seeing something like this on a reboot:
Rebooting.... Cisco Secure PIX Firewall BIOS (4.0) #0:Thu Mar 2 22:59:20 PST 2000 Platform PIX-515 Flash=i28F640J5 @ 0x300 Use BREAK or ESC to interrupt flash boot. Use SPACE to begin flash boot immediately.
But it never asks me to hit a key like it does above, as described at
Blaze King snipped-for-privacy@lake-coe.k.ca.us