On Mon, Aug 17, 2015 at 10:48 PM, Jay Jaeger <[email protected]> wrote: > The RLV11 was developed for the original LSI Bus. I'd expect it to be > Q-Bus compatible, but others here probably have more recent exposure. > It has been a while since I worked with an 11/23.
In 1987, all I could afford was a used 11/23 ($300 for BA11-N, CPU, 256K of RAM, DLV11J 4-line serial, LPV11 line printer interface, and BDV11 bootstrap and terminator) so for disk, I picked up an RLV11 ($100) and borrowed an RL01 off of my PDP-8/a. I used that for (RT-11) work for 2 years. Worked great! There should be no problems in an 18-bit backplane. If you want 22-bit, that's the RLV12, which works in everything Qbus including MicroVAXen. I never ran the diags... I just plugged in a drive with "0" plug in it, and booted it up. I may have borrowed an RL02 from my boss and booted it from that first and copied the OS to my RL01 and swapped drive plugs. Once it was running, I had 5MB for the OS and my development environment, and 10MB for customer data (and to transfer deliverables to the customer site - the target was a $20,000 11/73 with 4MB of RAM and a Fujitsu Eagle disk and a few other expensive extras (RLV12 + RL02...). I always got a kick out of developing for a machine that cost 50X what I paid for mine). -ethan
