[Simh] Standalone boot on vax8600?

[Johnny Billquist]

On 2014-07-13 04:19, Henry Bent wrote:
> Cool, thanks.
>
> I figured out what's going on.  The standalone programs are running,
> they just aren't displaying any input or output after the first
> character is printed.  So if I do this:
>
> --
> sim> load -o boot 0
> sim> run 2
>
> --
> and then blindly type "ra(0,0)vmunix", it boots!

[...]

Hmm hmm. I suspect I might know what is going on there. I'd have to test 
and play around some to verify, though. The console I/O on the 86x0 
machines are a bit special, and I wouldn't be surprised if there were 
some issues in simh related to that.

Mark, can we get some trace of all reads and writes to the registers 
related to the console? (There are four logical devices addressed on the 
86x0 machines through the same CSRs.)

Henry, if you could get such information logged, we could probably fix 
this pretty fast. Or else if you could just provide me with the files, I 
could test this myself as well. I don't have an old Ultrix image around, 
though.

	Johnny

>
> --
> Ultrix V2.2 System #2: Wed Nov 18 01:14:13 EST 1987
> real mem  = 8388608
> avail mem = 6888448
> using 34 buffers containing 278528 bytes of memory
> VAX 8600, serial no. 1234, hardware level = 7
> IO adapter 0 at address 0x20080000 is an SBI adapter
> uba0 at address 0x20006000
> uda0 at uba0
> uq0 at uda0 csr 172150 vec 774, ipl 15
> ra0 at uq0 slave 0
> de0 at uba0 csr 174510 vec 120, ipl 15
> mba0 at address 0x20012000
> ht0 at mba0 drive 0
> tu0 at ht0 slave 0
> boot device not found
> root device?
> --
>
> And I can then interact with the console, characters are displayed
> normally, etc.
>
> -Henry
>
>
> On 12 July 2014 19:33, Mark Pizzolato - Info Comm <Mark at infocomm.com
> <mailto:Mark at infocomm.com>> wrote:
>
>     On Thursday, July 10, 2014 at 5:23 PM, Mark Pizzolato wrote:
>      > On Jul 10, 2014 2:02 PM, Johnny Billquist <bqt at softjar.se
>     <mailto:bqt at softjar.se>> wrote:
>      > >
>      > > On 2014-07-11 01:08, Mark Pizzolato - Info Comm wrote:
>      > > > On Thursday, July 10, 2014 at 3:13 PM, Cory Smelosky wrote:
>      > > >> On Thu, 10 Jul 2014, Henry Bent wrote:
>      > > >>
>      > > >>> Well, that at least did something different.
>      > >>>
>      > >>> sim> boot rq0 /r5:8
>      > >>> Loading boot code from vmb.exe
>      > >>> %BOOT-F-Unexpected Exceptio
>      > >>>
>      > >>> The 8600 simulator always seems to cut off the last character
>     of its
>      > >>> messages, I wonder if that's in any way related to the other
>     console
>      > >>> problems.
>      > >>>
>      > >>
>      > >> 780, 750, and 730 have the same issue...along with not
>     actually booting from
>      > >> the console RL, floppy, et al.
>      > >
>      > > The last character output in a message just prior to executing
>     a HALT
>      > > instruction is not surprising since the simulator implements a
>     delay
>      > > (as a number of instructions executed) from when the data is put in
>      > > the output register prior to generating the completion
>     interrupt/status.
>      > >  The halt instruction gets executed before the delay number of
>      > > instructions have completed.  Even if that was 'fixed', nothing
>      > > operational would change.  The reason the message has been
>      > > generated will still exist.
>
>     The latest github code will no longer drop the last character output
>     just prior to executing a HALT instruction which returns to the
>     "sim> " prompt.
>
>     Like I said above, nothing else changes though.
>
>     - Mark
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>
>


-- 
Johnny Billquist                  || "I'm on a bus
                                   ||  on a psychedelic trip
email: bqt at softjar.se             ||  Reading murder books
pdp is alive!                     ||  tryin' to stay hip" - B. Idol