[Simh] autoboot

[Villy Madsen]

Super!!!

I should had read that document a little closer (I will go back and do so)

I remember now the little switch on the 4300......

On Sunday, April 30, 2006 15:46, Tim Pinkawa [SMTP:timpinkawa at gmail.com] wrote:
> vax
> On 4/30/06, Villy Madsen <Villy.Madsen at shaw.ca> wrote:
> > Autoboot when you start VAX
> > i.e.  I want VAX to autoboot the cpu (If it can't already, then that
> > shouldn't be hard to do)
> > and then I want the 3900 console to autoboot.
> >
> > I'm reasonably sure that our old 4300 did - but I can say for sure - it was
> > on a room UPS that had 3 hours capacity backed up by an autostart
> > generator.
> >
> > I don't think that we ever had an unscheduled power outage...
> >
> > Villy
> 
> I got this from the Running VAX/VMS Under Linux Using SIMH guide by
> Phillip Wherry (http://www.wherry.com/gadgets/retrocomputing/vax-simh.html).
> Add this to your vax.ini:
> 
> ; Uncomment the line below to enable auto-boot
> dep bdr 0
> 
> >From the guide:
> First, the line: dep bdr 0 is used to deposit the value 0 in the BDR
> register. This register contains the boot jumper/switch flag used by
> the VAX console ROM code. If bit 7 is high (i.e. if we'd instead said
> "dep bdr 80"), the ROM will print the VAX console prompt (>>>) instead
> of autobooting. For those who remember the VAX 11/7xx series machines,
> setting BDR to 0 is the equivalent of setting the key switch to the
> DISABLE position; setting BDR to 80 [hex] is like turning the key
> switch to its ENABLE position.
> 
> Hope this helps,
> Tim
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