RT-11

RT-11 was an OS for the PDP-11. Overall it has a very OS/8 feel to it.

notes

The filesystem was like that of OS/8 in that files are stored complete on the disk, so that if you delete them the disk will need to be 'squished' back down. http://www.vaxdungeon.com/

INITIALIZE (format floppy)

Device names

• dx0: rx01
• dy1: rx02 rq0 in simh
• dk0/dk1/dk2/dk3 are the disks on the boot controller...
• dl0: is the rl02
• du0: is the rx50 floppy
• dx0: is the rx0 floppy
• DX0:, DY1:, DL4: referred to disk volumes (RX01 unit 0, RX02 unit 1, RL01 or RL02 unit 4, respectively).
• ry0 VAX

dungeon instructions & image. http://www.geocities.com/capecanaveral/5517/pdp11.htm console floppies http://www.headcrashers.org/comp/rx01/

Commands

These are a few commands that I've managed to work out, in no particular order.

DIR command

Just like MS-DOS

RUN command

Dungeon for example is executed with RUN. I think you have to run .sav files.

@ command

COM files are like batch scripts, and are executed with the @ infront of them.

Squish command

Disks will need to be 'defraged' or compacted with this command. In some version it'll just be SQU.

.SQU
Device? DK0:
RK0:/Squeeze; Are you sure? Y

SHOW command

This is a very usefull command to show some info about the OS.

.SHOW
TT
RK  (Resident)
    RK0 = SY , DK
BA
PC
NL
LP
MS
MT
DM
DL
DX
DP
4 free slots

show configuration