Re: PDP-11/45 RSTS/E boot problem

[Paul Koning via cctalk]

> On Jan 6, 2019, at 8:01 PM, Fritz Mueller via cctalk <cctalk@classiccmp.org> 
> wrote:
> 
> 
>> On Jan 5, 2019, at 12:58 PM, Fritz Mueller <fri...@fritzm.org> wrote:
>> 
>> I did get some MACRO CRC-16 sub-routines coded up last night while waiting 
>> for various transfers, so I think I’ll go ahead and finish up the standalone 
>> CRC dumper utility today.
>> 
>> Lastly, a 5V-tolerant USB FIFO breakout board is supposed to show up in the 
>> mails today.  If that works out as simply as I hope to interface with a 
>> DR11-C, I should have a much better way to blast bits on and off the machine 
>> soon.
> 
> Okay, finished up the standalone CRC utility, and verified (to very long 
> odds) byte identical contents between reading the physical pack on the 
> machine and reading the downloaded pack under SIMH.  And that image doesn’t 
> boot on real HW, but works under SIMH.

Hm.  Can you read data back from the RK05 pack?  I'd have to refresh my memory 
on how but it's clearly possible to force a crash dump.  That would allow us to 
dig into exactly what went wrong, provided you can read the dump file (or the 
whole disk).

        paul