On 02/06/2017 10:30 PM, william degnan via vcf-midatlantic wrote:
Now that I have my PDP 11/40 running with twin RL02's I have been having fun with it by using simH to make disks and then porting them to an actual disk using PDPGUI program. Here's a good example, if you're looking to run RSX11/M on a PDP 11, I worked through a way to get it onto an RL02 drive. Version 3.2 will run on any PDP 11 with 64K, even 11/20.
http://vintagecomputer.net/browse_thread.cfm?id=668
I skimmed the web for a week, plus got some ideas and suggestions from simH users. The hard part was to find a way to get an operating system only found on RL01 drives to an actual RL02 drive. Most people believe RSX11/M is better than RT-11 I don't know yet, I was more interested in the process of making disks using simH. There is a lot of potential to do disk and tape operations with simH that would be impractical with actual hardware as very few of us have the real things.
Very cool. But, crap, I wish I'd known you were noodling so hard to figure that out. I've had that workflow set up for years; I could have saved you a lot of research time and effort. I generate bootable images under simh, then FTP them over to a MicroVAX-II running VMS set up as a media transfer station for RL packs. The same process works for RA series disks; there's a KDA50 controller in that same MicroVAX-II system. As for RSX11 vs. RT11...that depends on who you ask, and, of course, what your application is. RT11 is fairly boring; it doesn't really do much. RSX11 is very much a "kitchen sink" OS, extremely powerful. But that power doesn't come for free; there's some overhead, while RT11 is very slim. -Dave -- Dave McGuire, AK4HZ New Kensington, PA