[Simh] Update on LGP-30

[B Degnan]

I have been able to get through a lot more of the simulator-equivalent 
processing steps to match the input of the bootstrap programs where I to be 
working on the actual system using a Flexowriter.  I have been able to 
answer a lot of my earlier questions via trial and error, and a lot of 
reading.  I believe that loading the bootstrap manually is a must; one 
cannot use or create tapes otherwise.  I don't think this SIMH has the 
bootstrap pre-loaded. 

In order to enter instructions into memory I learned how to translate code 
from the various actual papertape sources...   

"flexowriter entry"> 6300 P 0000'  

becomes  

sim> d -a 6300 10000000  

where 6300 = memory loc in drum memory, 1000 = P, 0000 = accumulator 
address (?).  You can't store a "P" or "p" in memory.  You have to convert 
to its Flexo binary equiv. 

...it's slow going and I have been patching together what I think would be 
a workable bootstrap install process, but I expect to have to try a number 
of variations before I get any response from the machine.  Who knows, maybe 
I will be able to contribute a software guide from all of this.  I will 
document what I find and post on my web site, vintagecomputer.net.  

I am going to post this onto classic cmp, sorry about the cross post email. 
 

Bill
 
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