[HECnet] SIMH TOPS-20 question --> recipe for handling Tops20 install tapes

[Thomas DeBellis]

Try skipping forwarding one or two file marks.  There was some kind of 
stuff at the beginning of the tape that I didn't recognize.  The monitor 
was after two file marks.  So do a rewind then skip forward one file 
mark and maybe mtboot will be there.

On 12/25/21 2:20 PM, Paul Koning wrote:
>
>
>> On Dec 25, 2021, at 5:29 AM, R. Voorhorst <R.Voorhorst at swabhawat.com> 
>> wrote:
>>
>> I think Paul cannot get these files loaded on his Tops20 V4.1 system 
>> from hecnet, being barred by lacking decnet and/or Kermit functionality.
>> In the end (!) the tape recipe works as follows:
>> Get a FRESH  copy of tape BB-D867E-BM_TOPS20_V41_2020_INSTL.TAP-1 
>> (after unzip) from Pdp10 archive into a host directory.
>> In simh when the monitor Tops20 V4.1 has been fired up or before:
>> ATT –F TU0 SIMH G:\TEMP\BB-D867E-BM_TOPS20_V41_2020_INSTL.TAP-1 or 
>> your favorite location
>
> I found that SIMH is happy attaching it with -f tpc -- previously I 
> had misread the messages printed by that command and thought it had an 
> error.
>
> So according to the installation manual, that tape is the "install" 
> tape and is supposed to be bootable.  But if I mount it and issue 
> "boot tu0", nothing happens.  When I stop simh it tells me PC is 0.
>
> paul
>
>
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