Date   : Fri, 26 Apr 1991 07:38:06 GMT
From   : sdd.hp.com!zaphod.mps.ohio-state.edu!unix.cis.pitt.edu!fmgst@decwrl.dec.com (Filip M Gieszczykiewicz)
Subject: news

       Greetings.

       I have a Sol20 (as you may remember :-) and have only 1 drive
       (second one is in the mail, or so I hear). Well, with just
       one drive I have been able to format a diskette and then
       SYSGEN it. I have been unable, however, to get either of
       the copy programs that came with the machine to work with
       my setup - PIP and SCOPY.

       Just when I thought all hope was lost, I came up with an idea
       on how to do it. It's quite simple if one has access to the
       DDT utility. (debugger) The procedure is as follows:

       1) run DDT. You will get a message that DDT loaded and a
       version number will appear. The prompt should be a "-".
       2) insert the SOURCE disk and type "Ifilename.ext" - no space
       between the I and the filename. 
       3) Now type "R" - either you get an error message or the
       file loads and gives you "NEXT PC" and on the second line
       the ending address and the starting address, respectively.
       4) insert the DESTINATION disk. (I assume you have CP/M
       on it - for a warm-boot)
       5) press CTRL-C (you should get the A> prompt) if computer
       hangs, you didn't SYSGEN the DESTINATION.
       6) Now, I hope you wrote down the number under the "NEXT"
       header. That's the HEX ending address of the program now
       in memory. 
       7) For you hackers out there, quickly, what's the decimal
       equivalent of that hex number. For those non-hackers, either
       use a HEX-DEC table to a calculator and get that "NEXT" number
       into decimal.
       8) type "SAVE nnn filename.ext". "SAVE" is a built-in CP/M
       command that saves nnn 256-byte pages to disk with the name
       of "filename.ext". This is equivalent to a core dump, for
       those with a UNIX background. Basicly, you are saving an
       image of memory to disk. NOW, the "nnn" is the DECIMAL
       equivalent of the "NEXT" number we just computed and "filename.ext"
       is the filename under which you want the core to be saved.
       9) shut the machine off (to erase all RAM) and boot it. Now, run
       the program (or TYPE it if a TEXT file - yes you can do that
       too :-)
       10) Look at that...


       I assmune noone knows this since it was never suggested - in 
       reply to my 5+ postings ;-)

       Happy hacking.

       Take care.
       
       P.S. Now, for those with a Sol20 without a boot disk (but those
       that have a DiskJockey 2D @ 05000H :-), (no flames - these are
       no longer made and never will be), wanna a boot disk? ;-)
-- 
_______________________________________________________________________________
"The Force will be with you, always." It _is_ with me and has been for 11 years
Filip Gieszczykiewicz  "... a Jedi does it with a mind trick... " ;-)
FMGST@PITTVMS  or  fmgst@unix.cis.pitt.edu "My ideas. ALL MINE!!"