On May 27, 2010, at 1:23 PM, Christian Corti <cc at informatik.uni-stuttgart.de
  wrote: 
  On Wed, 26 May 2010, Josh Dersch wrote:
  I was working on software to dump 4051 tapes over
a serial port or
 the GPIB bus, as well as an emulator.  Both are still works in
 progress (progress being very slow at the moment) based on
 disassembling the system ROMs and going through the service
 manuals.  I recently came into possession of the actual source code
 for the 4051's ROMs on microfiche, which I've passed on to Al for
 archiving.  Looking forward to reading through those once he's done!
 I'm hoping that once I work out enough to write a basic emulation,
 I'll know enough about the hardware to write some assembly code for
 the real 4051 to allow raw dumps of 4051 tapes (and hopefully
 writing them back!).  But I have a few other things stealing time
 from me at the moment, so it won't be in the near future... 
 So the information on ftp://ftp.informatik.uni-stuttgart.de/pub/cm/tek4051/
  (I've already posted the link some time ago) is of no use? Funny,
 because I *did* write a working BASIC program to dump tapes into CBM
 8050 disk files (I have that drive attached to our 4051 as you
 know). But I still have to transfer these files to some other
 system... (too much other things to do).
 Christian
 
Uh,  I apologize for however I appear to have slighted you?
The information is useful, yes,  but less useful to me, being in a
language I do not speak (and Google translate does a fairly poor job
on this stuff.)
By all means, please do share your utility with the world.  I don't
quite understand the attitude here...
Josh