So, I am looking for the DL.SYS system file for RT-11
version 3B. They are
having to upgrade their Plesy RK05 disk drives to RL02s due to lack of
replacement parts (they've used old systems to cabbage parts, but there are
no more!). We programmers told them this would happen 10 years ago, but No
..o..o, they wouldn't listen.
How long do you think RL02 parts will be available?
I'd strongly recommend getting either a Unibus SCSI interface (assuming
that it's for a Unibus machine), or an RK05 or RL02 emulator.
Wilson Labs makes RK05 and RL01/02 emulators using SCSI drives:
http://www.wilsonlabs.com/products.htm
I have never used one, so I can't comment on quality.