For anyone interested, learn the PDP-11 instruction set from the first model, the PDP-11/20, before DEC added protection modes, memory management hardware, etc.

For anyone interested, learn the PDP-11 instruction set from the first model, the PDP-11/20, before DEC added protection modes, memory management hardware, etc. A summary of the instruction set is in Appendix A, and it's worth taking a look at chapters 3 and 4 of the PDP-11(/20) Handbook to get more detail on each instruction and the addressing modes. https://bitsavers.org/pdf/dec/pdp11/1120/PDP-11_Handbook_Second_Edition_1970.pdf https://bitsavers.org/pdf/dec/pdp11/1120/PDP-11_Handbook_Sec...