[Simh] Getting to the 780 console prompt

[Robert Jarratt]

> -----Original Message-----
> From: Knudsen, Ole [mailto:Ole.Knudsen at hp.com]
> Sent: 23 April 2009 13:56
> To: Brad Parker; r.jarratt at computer.org
> Cc: simh at trailing-edge.com
> Subject: RE: [Simh] Getting to the 780 console prompt
> 
> 
> Hi,
> 
> In the past I ran diagnosis on the 11/780. It is true, that they could
> be loaded from the console, but we was primarily running from the
> system disk.
> 
> All diagnostics files was copied to [sysmaint] on the system disk,
> diagboot.exe {as I remember} was the secondary boot file.
> 
> Boot /r5:10 would boot into the diagnostic supervisor (DS>) from where
> all diagnostics could be loaded and started in standalone mode.
> 
> http://vt100.net/mirror/hcps/ds780ug2.pdf shows how to test the 11/780.
> 
> It will not be possible to run micro diagnostic on the emulator, they
> are based on specific microrutines loaded into the hardware, they are
> testing isolated part of the logic without executing VAX instructions.
> 
> 
> Best regards
> 
> Ole Knudsen

OK, I understand that the diagnostics would not work, but I have been trying
to modify R5 using the SIMH DEPOSIT command before booting the 780 to see if
I can get it do a conversational boot (R5=1) or anything else. It does not
seem to react to any R5 values, except 0x10 which seems to cause some sort
of hang. Should I expect it to do a conversational boot if I try this (DEP
R5 1)?

Regards

Rob