See notes on

• I/O emulation setup
• FPGA Board setup
• Rlink and Backend Server setup
• SimH simulator setup
• E11 simulator setup
• Legal terms

• patch level is #447 plus fpsim+tcsh patch
• for history see CHANGELOG.md
• absolute minimal system !! Not for practical use !!
• was useful at a time when w11a had only RK11 type disk support
• /tmp stays on '/'
• /home is not mounted
• suitable for a 'root' user, other accounts not supported

A disk set is available from http://www.retro11.de/data/oc_w11/oskits/211bsd_rkset.tgz

Download, unpack and copy the disk images (*.dsk), e.g.

    cd $RETROBASE/tools/oskit/211bsd_rk/
    211bsd_rk_setup

• Start backend server and boot system (see section Rlink in w11a_os_guide)

       boot script:  211bsd_rk_boot.tcl
       example:      ti_w11 <opt> @211bsd_rk_boot.tcl
                     where <opt> is the proper option set for the board.
  

  or use for verification the SimH simulator (see section SimH in w11a_os_guide)

  pdp11 211bsd_rk_boot.scmd
  

• Hit <ENTER> in the xterm window to connnect to backend server. The boot dialog in the console xterm window will look like (required input is in {..}, with {<CR>} denoting a carriage return:

       70Boot from rk(0,0,0) at 0177404
       : {<CR>}
       : rk(0,0,0)unix
       Boot: bootdev=03000 bootcsr=0177404
       
       2.11 BSD UNIX #28: Wed May 29 22:28:06 PDT 2019
           root@w11a:/usr/src/sys/RETRONFPRK
       
       phys mem  = 3932160
       avail mem = 3577856
       user mem  = 307200
       
       May 29 22:29:10 init: configure system
       
       dz 0 csr 160100 vector 310 attached
       lp 0 csr 177514 vector 200 attached
       rk 0 csr 177400 vector 220 attached
       rl 0 csr 174400 vector 160 attached
       tm 0 csr 172520 vector 224 attached
       xp 0 csr 176700 vector 254 attached
       cn 1 csr 176500 vector 300 attached
       erase, kill ^U, intr ^C
  

  In first '#' prompt the system is in single-user mode. Just enter a ^D to continue the system startup to multi-user mode:

       #^D
       Fast boot ... skipping disk checks
       checking quotas: done.
       Assuming non-networking system ...
       checking for core dump... 
       preserving editor files
       clearing /tmp
       standard daemons: update cron accounting.
       starting lpd
       starting local daemons:Sat May 20 23:02:20 PDT 2017
       May 20 23:02:20 init: kernel security level changed from 0 to 1
       
       2.11 BSD UNIX (w11a) (console)
       
       login: 
  

  The login prompt is sometimes mangled with system messages, if its not visible just hit <ENTER> to get a fresh one.

       login: {root}
       erase, kill ^U, intr ^C
  

  Now the system is in multi-user mode, daemons runnng. You can explore the system, e.g. with a pstat -T or a mount command. The second xterm can be activated too, it will connect to a second emulated DL11. At the end is important to shutdown properly with a halt:

       # {pstat -T}
        10/186 files
        44/208 inodes
        10/150 processes
         7/ 46 texts active,  30 used
         2/135 swapmap entries,  496 kB used, 1939 kB free, 1933 kB max
        35/150 coremap entries, 2828 kB free, 2744 kB max
         1/ 10  ub_map entries,   10    free,   10    max
       # {mount}
       /dev/rk0h on /
       /dev/rk2h on /tmp
       /dev/rk3h on /bin
       /dev/rk4h on /usr
       # {halt}
       syncing disks... done
       halting
  

  While the system was running the server process display the

       cpu0> 
  

  prompt. When the w11 has halted after 211bsd shutdown a message like

       CPU down attention
       Processor registers and status:
         PS: 030350 cm,pm=k,u s,p,t=0,7,0 NZVC=1000  rust: 01 HALTed
           R0: 177560  R1: 161322  R2: 053436  R3: 000010
           R4: 003000  R5: 147510  SP: 147466  PC: 000014
  

  will be visible. Now the server process can be stopped with ^D.