HP3000-L Archives

July 2007, Week 4

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Subject:
Re: from before HP
From:
Tracy Pierce <[log in to unmask]>
Reply To:
Tracy Pierce <[log in to unmask]>
Date:
Mon, 23 Jul 2007 10:11:51 -0700
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text/plain (57 lines) 
it's machine code for IBM 1400 series, maybe others?  this sequence is
used to boot from cards.  

Hitting the LOAD button would 
read a card into core positions 1-80, 
set a wordmark in position 1, 
and branch there.

comma is SetWordmark, the next 6 chars are 2 three-char addresses.  so
,007014 would set wordmarks for the next two instructions to be
executed, then the cpu would move to the next address and (now
wordmarked, a cross-check requirement for executing an instruction)
execute the instruction there.  continue the pattern a bit, and soon you
have wordmarks set under 'real' instructions with which to do some work.

the 1st 3 cards in a deck are the bootstrap code, which would do the
self-start as above and then load the rest of your program into
contguous memory, then branch there.  I don't remember many addresses,
but 1-80 = card reader, 101-180 = card punch, 201-332 = line printer.  

sorry, I don't recognize the 2nd one.

Tracy Pierce

 

> -----Original Message-----
> From: HP-3000 Systems Discussion 
> [mailto:[log in to unmask]] On Behalf Of Joe Weisman
> Sent: Sunday, July 22, 2007 8:04 AM
> To: [log in to unmask]
> Subject: from before HP
> 
> I have a sign over my desk from my past: ",007014,022029"
> 
> Anybody know what it is?
> 
> How about "3400032007013600032007024902402511963611300102"
> -- 
> 
> Joe Weisman - [log in to unmask] - 541-745-5265
> 
> "In short, humanity creates meaning for itself by liberating itself so
> that it can fulfill itself.  This is also a solipsism, but one as big
> as all existence.  Odd, isn't it, that atheists can be right about God
> but wrong about religion and much else about the modern condition,
> while a believer can be wrong about God but at least on the right
> track concerning the current spiritual malaise?"
>                                      - Danial Lazare; Nation 28may07
> 
> * To join/leave the list, search archives, change list settings, *
> * etc., please visit http://raven.utc.edu/archives/hp3000-l.html *
> 

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