Interesting. I haven't seen one of those, I've always seen them as a "IIsi & SE/30" ethernet card, and then a seperate IIsi adaptor card (with or without an FPU). I just pulled out my files of The Diskless Mac. It is by Sonic. I originally found the stuff just sitting on their FTP site (so naturally I downloaded it). I've never used it, but from what I can tell of it works with Sonic ethernet cards, and a BootP server (they even include a mini unix BootP server), and lets you use create a "Boot Image" that gets stored on the ethernet card. So they have a sort of Boot RAM instead of a Boot ROM. Their readme does make a mention of NOT installing the "secure boot extension" without having the TDM 2.0 Boot ROMs installed. So either the roms are flashable, or maybe can be pulled and replaced, or possibly are an optional part entirely (meaning that socket might very well be for the boot rom, and not an FPU). I tried running the TDM admin on this machine (PM 6500 with stock Apple 10b-T card), and it didn't recognize it as a valid machine to admin. It would be interesting to see if it would recognize your card, since you have a sonic card. (maybe once I get my PB 1400 running again, I will try it on my Sonic PCMCIA ethernet card) You can still download the software from their FTP site (I just checked). Go to ftp.sonicsys.com/pub/software/Unsupported/The_Diskless_Mac. They also have the latest version of their Ethernet drivers there (v7.8), so maybe that has a newer version of a diagnostic tool to see if your card is still good. -chris <http://www.mythtech.net>