cancel
Showing results for 
Search instead for 
Did you mean: 

Computing nostalgia

Community Veteran
Posts: 26,378
Thanks: 634
Fixes: 8
Registered: 10-04-2007

Computing nostalgia

Prompted by this post http://community.plus.net/forum/index.php/topic,74056.msg590655.html#msg590655
I'm old enough to remember but was a programmer, not an operator - and our's were ICL System 4/70 and a 4/72 which used the same machine instructions. Hence the prized possession which lurks at the back of my desk drawers.
How many people here could explain (without looking it up) what a BXLE does and how to use it?
jelv (a.k.a Spoon Whittler)
   Why I have left Plusnet (warning: long post!)   
Broadband: Andrews & Arnold Home::1 (FTTC 80/20)
Line rental: Pulse 8 Home Line Rental (£13/month)
Mobile: iD mobile (£4/month)
5 REPLIES
Moderator
Moderator
Posts: 25,784
Thanks: 1,133
Fixes: 47
Registered: 14-04-2007

Re: Computing nostalgia

I've looked it up and I'm still not clear Embarrassed
Customer and Forum Moderator.
Product of the Tyrell Corporation
MrC
Grafter
Posts: 523
Registered: 17-07-2008

Re: Computing nostalgia

Sheer and utter guestimate - Branch and Xor if LEss than?
Mike (did a small amount of 360 assembler back in the mid-80s)
Moderator
Moderator
Posts: 25,784
Thanks: 1,133
Fixes: 47
Registered: 14-04-2007

Re: Computing nostalgia

Oh it's a conditional instruction Undecided
Customer and Forum Moderator.
Product of the Tyrell Corporation
Community Veteran
Posts: 26,378
Thanks: 634
Fixes: 8
Registered: 10-04-2007

Re: Computing nostalgia

Quote from: MrC
Sheer and utter guestimate - Branch and Xor if LEss than?

Close! Branch on Index Low or Equal.
Horribly complicated to use (but very efficient) and generally only used by clever dicks who were trying to show off or by most programmers just once to be able to say they'd used it. If you were a maintenance programmer and came across it you would groan!
jelv (a.k.a Spoon Whittler)
   Why I have left Plusnet (warning: long post!)   
Broadband: Andrews & Arnold Home::1 (FTTC 80/20)
Line rental: Pulse 8 Home Line Rental (£13/month)
Mobile: iD mobile (£4/month)
MrC
Grafter
Posts: 523
Registered: 17-07-2008

Re: Computing nostalgia

Smiley I only did a very small amount of IBM assembler; most of my commercial programming was COBOL74/85 on Tandem before I moved over onto Tandem application and system support, and then onto Unix and then network applications and security.
Now I drive trains for a living and it all seems a world awaySmiley
Mike