Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Vintage Arcade, Pinball, and MAME

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 09-05-2014, 03:47 PM
mpatoray's Avatar
mpatoray mpatoray is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Near Youngstown Ohio
Posts: 258
Playing Space Invaders on a PDP-11

A few weeks agao we had a Hack session down at my buddy's place in PA. We accomplished many things but the BIG thing was getting his DEC PDP-11/70 up and running, running on a DEC VT-320 terminal.

After we celebrated, by dreaming up even bigger things to do with it(install an Ethernet interface and get it on the net!). wE THEN DECIDED TO USE THE SMALLER pdp-11/23 setup to see if we could archive a set of 8" DEC floppy discs (the 11/70's floppy drive broke a belt). We where able to read all 10 floppy discs and get off all of the data.

One of the programs was called SPACE.SAV which in DEC parlance is an executable file. Typed in run and up on the terminal came Space Invaders!

The implementation is quite good, since it is a terminal graphics are rendered using ANSI characters, there is even animation of those chars, all pretty good for a data rate 0f 9,600 Baud.

There is also a bit of humor built into the game, if you just sit there and do nothing, get bombed and have a very low score, instead of saying 'High Score" at the top of the screen it says 'What utter crap"
Reply With Quote
  #2  
Old 09-10-2014, 07:06 AM
MIPS's Avatar
MIPS MIPS is offline
VideoKarma Member
 
Join Date: Jun 2014
Location: West Canadia
Posts: 438
What OS was he running on the /23? RT-11?

Edited: Oh shoot. I just realized this is an old thread.
Reply With Quote
  #3  
Old 09-11-2014, 11:24 PM
bandersen's Avatar
bandersen bandersen is offline
Restoring Moto VT71s
 
Join Date: Mar 2009
Location: Chicago, IL
Posts: 7,227
Old thread? It was created Sept 5th, 2014 - about a week ago.
__________________
Here are my Vintage Radio & TV YouTube Channel and Photo Gallery
Reply With Quote
  #4  
Old 09-12-2014, 08:44 AM
mpatoray's Avatar
mpatoray mpatoray is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Near Youngstown Ohio
Posts: 258
RT/11 was running on both machines. Now that the 11/70 is "Plug and play ready" the next task we to install the Q-BUS expansion chassis move some cards to there as well as install the Ethernet card.

After that we will set it up with some storage arrays and then will install RT/11 RSTIS, and UNIX on it and form the drive controller front panel will be able to select the OS to boot at power on.
Reply With Quote
  #5  
Old 09-15-2014, 09:54 PM
MIPS's Avatar
MIPS MIPS is offline
VideoKarma Member
 
Join Date: Jun 2014
Location: West Canadia
Posts: 438
Quote:
Old thread? It was created Sept 5th, 2014 - about a week ago.
Sorry, still figuring out the timestamps. Thought that was May 9 2014.

How well do those older front panel machines work? Are they at all worth the premium prices they normally fetch both on ebay and outside of ebay?
Reply With Quote
Audiokarma
  #6  
Old 09-17-2014, 02:50 PM
mpatoray's Avatar
mpatoray mpatoray is offline
VideoKarma Member
 
Join Date: Apr 2010
Location: Near Youngstown Ohio
Posts: 258
The PDP/11 series of computeres are quite different then the Altair 8080 and IMSI 8080 that where offered to the consumer. The PDP/11 is a 16 bit minicomputer series that was very popular with research organizations, Bell Lbas had tons of them and Dennis Ritchie co wrote UNIX for use on the 11.

The IMSI commands a high price because it was "The computer in War Games" The Altair because it was the first packaged kit computer that you could buy, and the first one Bill Gates and crew wrote a BASIC interpreter for. Neither computers where very high power but hey we are talking 1975 and most people had never seen anything like it on a desk in the home.
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 07:36 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ęCopyright 2012 VideoKarma.org, All rights reserved.