Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > comp.misc > #15133

Re: printing Xmas cards on a vintage IBM 1401 mainframe

Cross-posted to 2 groups.

Show all headers | View raw

It reminds me of The Print Shop and Print Master in Apple 2s and PC DOS. ! ;)


In comp.misc RS Wood <rswood@therandymon.com> wrote:
> http://www.righto.com/2017/12/creating-christmas-card-on-vintage-ibm_7.html

> Next, I needed a program to print out this file. I have some experience
> writing assembly code for the IBM 1401 from my previous projects to
> perform Bitcoin mining on the 1401 and generate Mandelbrot fractals. So
> I wrote a short program to read in lines from punched cards and print
> these lines on the high-speed 1403 line printer. The simple solution
> would be to read a line from a card, print the line, and repeat until
> done. Instead, I read the entire page image into memory first, and then
> print the entire page. The reason is that this allows multiple greeting
> cards to be printed without reloading and rereading the entire card
> deck. The second complication is that the printer is 132 columns wide,
> while the punch cards are 80 columns. Instead of using two punch cards
> per print line, I encoded cards so a "-" in the first column indicates
> that the card image should be shifted to the right hand side of the
> page. (I could compress the data, of course, but I didn't want to go to
> that much effort.)

-- 
Quote of the Week: "I really believe I've been a good person. Not 
perfect - forget about perfect - but just learning by what I was taught 
and living by my own values. I might have stepped on a few ants - and a 
few other things as well - but I've never hurt anybody." --Kiri Te 
Kanawa
Note: A fixed width font (Courier, Monospace, etc.) is required to see this signature correctly.
  /\___/\                     Ant(Dude) @ http://antfarm.home.dhs.org &
 / /\ /\ \                 Ant's Quality Foraged Links: http://aqfl.net
| |o   o| |
   \ _ /    Please nuke ANT if replying by e-mail privately. If credit-
    ( )     ing, then please kindly use Ant nickname and AQFL URL/link.

Back to comp.misc | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread

Thread

printing Xmas cards on a vintage IBM 1401 mainframe RS Wood <rswood@therandymon.com> - 2017-12-10 22:12 -0500
  Re: printing Xmas cards on a vintage IBM 1401 mainframe ANTant@zimage.com (Ant) - 2017-12-11 14:01 -0600
    Re: printing Xmas cards on a vintage IBM 1401 mainframe Oregonian Haruspex <no_email@invalid.invalid> - 2017-12-14 05:55 +0000
      Re: printing Xmas cards on a vintage IBM 1401 mainframe RS Wood <rsw@therandymon.com> - 2017-12-14 14:47 -0500
        Re: printing Xmas cards on a vintage IBM 1401 mainframe Peter Flass <peter_flass@yahoo.com> - 2017-12-14 15:49 -0700
          Re: printing Xmas cards on a vintage IBM 1401 mainframe ANTant@zimage.com (Ant) - 2017-12-16 14:49 -0600
            Re: printing Xmas cards on a vintage IBM 1401 mainframe Peter Flass <peter_flass@yahoo.com> - 2017-12-18 07:38 -0700
        Re: printing Xmas cards on a vintage IBM 1401 mainframe Paul Sture <nospam@sture.ch> - 2017-12-15 00:44 +0100
      Re: printing Xmas cards on a vintage IBM 1401 mainframe Andreas Kohlbach <ank@spamfence.net> - 2017-12-14 16:18 -0500
        Re: printing Xmas cards on a vintage IBM 1401 mainframe ANTant@zimage.com (Ant) - 2017-12-14 16:06 -0600
      Re: printing Xmas cards on a vintage IBM 1401 mainframe ANTant@zimage.com (Ant) - 2017-12-14 16:05 -0600
        Re: printing Xmas cards on a vintage IBM 1401 mainframe Oregonian Haruspex <no_email@invalid.invalid> - 2017-12-23 20:17 +0000

csiph-web