I don't know; I didn't see it. To me, a processor architecture is hung off the register structure and how the registers are used. When I read the introductory chapters of the NS32 book, I got all excited, but when I actually waded through the description of the machine I felt let down. The thing about the VAX is that the entire machine is built around the general purpose register set. Things that are special in other architectures (immediate values, pushing and popping the stack) are simply side effects of everyday addressing modes on the VAX. You can pop things from the stack because you can pop them from any register; MOV R0,(R1)+ works just as well as MOV R0,(SP)+. Immediate values are fundamentally popping things from the PC: MOV R0,(PC)+. The NS32K required special address modes for these operations because SP and PC weren't general purpose registers. I'm also not impressed by folks who claim that a 68000 is a whole lot like a PDP-11 for the same reason... Roger Ivie ivie(a)cc.usu.edu