[Simh] EXT :Re: PDP-10 simulation: DEUNA support help needed

[Cory Smelosky]

On Thu, 30 Apr 2015, Rich Alderson wrote:

>
> Multi-unit structures.  Striping came along with redundant arrays of
> inexpensive disks.  At $50,000 a drive, RP07s were not candidates. ;-)
>

Heh, definitely not. ;)

>>> Getting a file system working was about 6 months of last year.
>
> Long talks with two old friends, both SAIL alumni who worked on the OS when it
> was a research specialty all its own, were the first part--and sometimes one or
> the other would not remember changes made for later devices (like the RP07s).
> Then I discovered the program RSKINI in browsing SAILDART.org, and things began
> to gel; I eventually converted it from FAIL to Macro-10, instrumented the hell
> out of it[1], and took the logged output as the source for the next part of the
> process.
>

Recovering stuff like this is very fascinating to me.

> That consisted of setting up FILDDT batch jobs on Tops-10 (patched to not treat
> foreign drives as offline) where the output from RSKINI was scribbled directly
> onto the disks.[2]  Once that was done, WAITS could boot past the point where
> it wanted to turn on swapping.
>

Those patches sound useful for some CIS stuff.

>> Does that mean you have bootable TENEX installation media, or would you
>> need to construct manually and cross-assemble before rebuilding itself?
>
> I don't think anyone has bootable TENEX media.  It would be a labor of love to
> try to cross-compile TENEX under TOPS-20 on a Toad-2, then build a boot program
> for the KI that could read it in from disk.  At least the file system layout is
> similar to TOPS-20.
>

Hmmm - yeah.

> We've probably bored the broader audience enough.  Talk to you soon in private
> e-mail.

Probably - I was unsure if private mails go through - my mailserver is 
funny.

>
>                                                                Rich
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-- 
Cory Smelosky
http://gewt.net Personal stuff
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