[cctalk] RSTS and big MSC disks

Earlier there was a question about MSCP disk sizes. I did some checking. RSTS understands all the devices known by name in SIMH, including the "giant" RF73. As of the "big disk" support, which is in V10.1 and I think a few earlier versions, it can handle something that big. It draws the line at 4096 MB; bigger than that and it will tell you the disk is too big when you try to initialize it. I thought it might use only the part it can handle, but no, it simply refuses entirely. paul