I have a large quantity of disks that I wish to copy to files that can be directly used by the SIMH PDP-11 emulator and by the E11 emulator. They include 8" floppies (both RX01 and RX02), RL01, and RL02.
The issue is that the disks have sector sizes that differ from the usual 512 bytes, as well as having interesting interleave and stagger factors. RX50 (and RX33?) disks have (I think) 512-byte sectors, but some odd track usage. I also believe that RX02 disks have the first track in single-density mode, just to complicate things, but it isn't used by most DEC O/S software. RL01 and RL02 disks also have bad-block sectors at the end of the disk. I am assuming that SIMH and E11 emulate the device faithfully enough that programs which are aware of the interleaving and small sector sizes will work properly. If this assumption is wrong, please enlighten me. If my assumption is correct, what is the best way to copy the raw disks (which are in a variety of O/S formats) to files which the emulators will be happy with. I can bring up a real PDP-11 with RX02, but will probably be using a microVAX-II with an Andromeda FDC11-B controller and Shugart 800 drives. I don't mind writing my own code with QIOs. I have a bunch more questions related to this, but this will do for now. :-) All of this is related to cleaning out my storage units and de-cluttering my life. Alan Frisbie -- Alan E. Frisbie fris...@flying-disk.com -- 4759 Round Top Drive 323-256-2575 -- Los Angeles, CA 90065 _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh