[Simh] VAX-3900 only autoboots if you have >64Mb??

[Jason Stevens]

ka655x.bin is the 'extended' rom for additional memory... if you want
to boot up with a small amount then you want ka655.bin

I'm sure it's in here (
http://sourceforge.net/projects/simh/files/simh%20source%20code/Older%20versions/
) somewhere.. If you can't find it let me know I'm sure I have it
kicking around somewhere....

On Thu, Apr 14, 2011 at 9:42 AM, Bob Armstrong <bob at jfcl.com> wrote:
>  This sequence of simh-vax commands auto boots (as it should)
>
>        load -r ka655x.bin
>        set cpu 128m
>        ... extraneous stuff deleted ...
>        dep -b BDR 0
>        boot cpu
>
> but this doesn't -
>
>        load -r ka655x.bin
>        set cpu 48m
>        ... the same extraneous stuff deleted ...
>        dep -b BDR 0
>        boot cpu
>
> You don't get any errors, but instead of auto booting the MicroVAX firmware
> just stops at the >>> prompt.
>
>  It looks like the BDR setting only works if the CPU is "extended" with
> more than 64Mb of memory.  That doesn't seem right - certainly a real
> MicroVAX would be able to auto boot under these circumstances.  Am I doing
> something wrong, or is this a bug?
>
> Thanks,
> Bob Armstrong
>
>
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