PDP-11/73 boot issues

Chris Zach cz at alembic.crystel.com
Tue Sep 21 14:34:44 CDT 2021

Can an MXV11 be used in a 22 bit system? I thought it was an 18 bit device?

That could cause all sorts of hilarity.


On 9/21/2021 3:21 PM, Aaron Jackson via cctalk wrote:
>> This is an interesting amount of physical memory to report (1152K).  What
>> memory board(s) do you have installed?
>> Other than that, this output looks sane to me.  I'd suggest booting XXDP
>> and running CPU, memory diagnostics from there.
>> - Josh
> Thanks, I forgot about XXDP. I have ran a memory test from the boot ROM
> which came back ok.
> The unusual amount of RAM comes from two MSV11-PL 512K cards, plus the
> 128K from MXV11-BF.
> Thanks,
> Aaron

More information about the cctalk mailing list