PDP-11 Unix v5

Warren Toomey wkt at henry.cs.adfa.oz.au
Fri Dec 5 12:25:54 AEST 1997

In article by Erin Corliss:
> My roommate and I have a PDP-11/23 Plus that has no disk or tape drives
> and no controller board for either.  I've been able to boot Unix version 5
> on an emulator here, and from what I've read, this operating system should
> be able to boot on the PDP-11/23.  The operating system has a kernel in
> the root directory called "unix", which is about 23 kilobytes long.  I am
> trying to set the computer up to boot from a serial port which will be
> connected to a Linux machine, which will simulate an RK05 disk drive.
> Does anyone know where the low level routines for reading and writing on
> an RK series drive are found?  Are they built into the kernel or are they
> in some separate device driver or module?  Also, I need to know what
> memory locations are used as registers by the RK05 drive and what commands
> can be given to it, so if anyone has spec sheets for it....

Eric, I don't think this is going to work. The RK05 driver is in the
kernel, and it plays with the RK05 hardware registers. You aren't going
to be able to emulate these, as far as I can tell.

If you tell us where you live, perhaps someone on the list might be
able to help you find an appropriate drive and disks for your 11/23+.

I do have some old ('74) spec sheets for the RK05 drives.

Does anybody else have other suggestions???

Best wishes,


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