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PDP 11 Unibus processors

PDP 11 Unibus processors

Machine Year CPU Instruction set Tests
11/20, 11/15 1970 KA11 Base
11/45 1972 KB11-A, KB11-D
11/50 1973
11/55 1976
11/35, 11/40 1973 Basic, Sob, Xor
11/05, 11/10 1972 Basic, ASH w/ option KE11-A
11/70 1975 KB11-B, KB11-C Basic, Sob, Xor
11/04 1975 Basic
11/34 1976 KD11-E, KD11-EA Basic, Sob, Xor, MTPS

> [!NOTE]
> MTPS was found in the code for FKACA, the CPU test for the EIS instructions. Also see here. where it is stated that the 11/34 supported that.
11/60 1977 Basic, Sob, Xor
11/44 1979 Basic, Sob, Xor, MFPT
11/24 1979 Basic, Sob, Xor, MFPT
11/84 1985
11/94 1990

Instruction sets:

  • Base: 11/20 basic instruction set
  • Sob: SOB, MARK, RTT, SXT instructions
  • ASH: ASH, ASHC, MUL, DIV instructions
  • XOR: ASH: ASH, ASHC, MUL, DIV, XOR instructions
  • MFPT: MFPT instruction
  • “Upon execution, the MFPT instruction returns to the low byte of R0 a processor model code(octal 3 for PDP 11/68). The high byte of R0 will be loaded with a processor specified subcode(octal 0 for PDP 11/68.”
  • MFPS/MTPS instruction (LSI-11) (move to/from PSW)

For XXDP tests take a look at this page from Henk Gooijen (Thanks, Henk!).

Instruction set info:

© 2024 by Frits Jalvingh. All information in here can be freely used (MIT License)