Hi Matt, sorry I can't help you with the 750, but still want to
congratulate you for having dug that thing out of that place :-).
Did you get your devil's VAX yet?
Did you get any further with the 11/780?
good luck,
-Gunther
Matthew Sell wrote:
>
> Guys,
>
>
> I've finished restoring a VAX 11/750 back to good physical condition,
> and have (by trial and error) selected a boardset that "appears" to be
> operating correctly as far as I can tell.
>
> The problem I'm having deals with booting from the integral TU-58.
>
> When the machine starts up (set to halt on boot) - it presents the
> proper message:
>
> 00000000 16
>
> Running the microdiagnostics gives no errors:
>
> %%
> 00000000 01
>
> However, attempting to boot from the TU-58 (B DDA0) results in the
> following message:
>
> FFFFFFFE 05
>
> The strange thing is that the diagnostic LED on the TU-58 controller
> does not respond as I would think it should. From what I understand of
> it's operation, the diag LED on the controller is supposed to blink once
> when power is applied, pause while internal controller diagnostics are
> performed, and the light constantly when diagnostics pass (on the
> controller). On mine, the LED blinks, and then stays unlit. But, if I
> disconnect P2 (the communications cable to the 750 CPU), this controller
> diag LED operates as expected.
>
> This same behavior is observed if I remove L0004 in slot 4, then the
> TU-58 controller behaves as I have read it should.
>
> This machine did have the remote diagnostics option installed, and I had
> to move the TU-58 and console communication connectors to the alternate
> position on the backplane as if the remote diagnostics option was not
> installed. If I put these connectors back in the original positions (as
> if the remote diag option was installed), the TU-58 controller passes
> diagnostics, but the console does not respond (duh....).
>
> Could the L0004 be sending a garbled request to the TU-58 controller? I
> have tried two different L0004 boards, both exhibit the same problem. I
> have tried different memory controllers to test the boot PROMs, and
> swapped (and removed!) the L0008s, etc.
>
> Erf.
>
> Any ideas?
>
> From what I understand of the installation of the remote diagnostics
> module, the only modifications required were the installation of the
> board (L0006), moving the TU-58 and console comm plugs to the left row
> of backplane pins, and the installation of the modem.
>
> Could I be missing another modification that needs to be "undone" ?
>
> I really appreciate any hints or guidance.
>
> Thanks!
>
>
> - Matt
>
>
>
>
>
>
>
>
>
> Matthew Sell
> Programmer
> On Time Support, Inc.
> www.ontimesupport.com <http://www.ontimesupport.com/>
> (281) 296-6066
>
> Join the Metrology Software discussion group METLIST!
> http://www.ontimesupport.com/subscribe_t&c.html
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>
>
> "One World, One Web, One Program" - Microsoft Promotional Ad
> "Ein Volk, Ein Reich, Ein Fuhrer" - Adolf Hitler
>
> Many thanks for this tagline to a fellow RGVAC'er...
>
--
Gunther Schadow, M.D., Ph.D. gschadow_at_regenstrief.org
Medical Information Scientist Regenstrief Institute for Health Care
Adjunct Assistant Professor Indiana University School of Medicine
tel:1(317)630-7960 http://aurora.regenstrief.org
Received on Sat Jul 13 2002 - 00:13:00 BST