Hi guys, Does anyone have any recommendations for a good book on the 68000/68010 CPUs (covering assembly language, the programming architecture and the interrupt system as a minimum)? I'm trying to disassemble the AT&T UNIX PC Boot PROM and Loader, and figure out why the Loader doesn't seem to think my WD2797 emulation is providing valid data... As I said before, it's probing the FDC, reading either two or four sectors, then giving up and trying the HDD instead.... -- Phil. classiccmp at philpem.me.uk http://www.philpem.me.uk/