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PDP 11 Unibus processors

PDP 11 Unibus processors

MachineYearCPUInstruction setTests
11/20, 11/151970KA11Base
11/451972KB11-A, KB11-D
11/501973
11/551976
11/35, 11/401973 Basic, Sob, Xor
11/05, 11/101972 Basic, ASH w/ option KE11-A
11/701975KB11-B, KB11-CBasic, Sob, Xor
11/041975 Basic
11/341976KD11-E, KD11-EABasic, 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.
11/601977 Basic, Sob, Xor
11/441979 Basic, Sob, Xor, MFPT
11/241979 Basic, Sob, Xor, MFPT
11/841985
11/941990

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)