Welcome to RSX11M.com

A site for information on the computer operating system RSX11M+
which runs on DEC PDP-11 computers.

RSX-11M-PLUS V4.6  BL87   (FRODO )  2044K  UP 003:11:46 16-APR-2018 20:44:34
TASK=  *IDLE*                FREE=   SY0:394310.      DU1:1486188.
ICBP=1410.:1764.:2.                  VF0:700.         DU2:DMO        PARS
POOL=5740.:7638.:24.         SECPOOL=597.:1024.:58%
     5740.:7638.:24.                 597.:1024.:58%                 SECPOL:P
                                                                    SYSPAR:D
IN:  DRD.FF.QHAENNFNDFRCR . .RFW                                    DRVPAR:D
26   ICU.C1.MRTVTTTEUTECM . .M1W                                    GEN   :D
208K RT:.S1.GC.C..ST0PSSS . .D1W
OUT: 1. ARAK..V.NNDA1$AMR E PVA.
0    1. TECE..2.NNECF$CRE D I2C.
0K   M. .SPD.. .SSQP1$PXS T P P0
    !!])+!++>>>>>+>>>+>!!--++>>->
0*******127*****255*****383*****511*****638*****766*****894*****
EPP-D-DD--------------------------------------------------------
----------------------------------------------------------------
1022****1149****1277****1405****1533****1660****1788****1916****
                                  !!=======!!===============!!!!
                                   N   I    N       C        NNP    ERRSEQ
                                   T   P    T       A        TTO    0.
                                   .   P    .       C        ..O
                                   I   O    L       H        REL
                                   P   O    A       E        TV.
                                       L    T                HL.

Useful links to find RSX and PDP-11 documentation and distributions:
RSX A User's Guide
DEC RSX11 Manuals from bitsavers
Trailling Edge FTP collection of DEC software, including DECUS SIG tapes

Simh is an emulator of various old computer systems that runs under Linux, OSX, and Window
Emulating a PDP-11 under Simh is a great way to get started with an exploration of RSX11M or RSX11M+
Trailling Edge Computer History Emulator Site
GitHub Site for latest version of Simh


RSX11M running on PDP-11s with "Blinken Lights" front panels had a idle light pattern that was unique
PDP-11/70 panel running RSX11M+
A look behind the console, a BeagleBone running Simh
Download your own virtual PDP-11/70 running RSX11M+ Blinking Lights

Or build yourself a Replica PDP-11/70, the PiDP-11/70 kit by Oscar Vermeulen


A Real PDP-11/70 from Henk Grooijen's collection