jeff.ho...@fiserv.com (Jeff Holst) writes: > Some, if not all, punches had multiple stackers, which might be > thought of as buckets for receiving the punched cards. At my first > job, we had a combination reader/punch, and it was possible to direct > both the read cards and the punched cards to a common stacker. Not > using a spooler for either the card input or output, it was possible > to examine the input data and punch a card to flag an error on the > previously read card. We would have the tabs on the cards (the cut > corner) of the punched cards such that their location was opposite of > the read cards, making it easy to spot the punched cards in the > stack. That was the way it worked years before I got there. Since that > time, the job in question had gone from card input to tape (produced > by key to disk operators) and the errors were now identified by a > printed report. However, the original code to open and close the punch > was still present and as a result header and trailer cards were still > punched. My first programming task was to get rid of this, which > proved to be harder than it sounds.
univ. still did registration with sense-marked cards (no. 2 pencil). field house with lots of tables for each class, get in line for a card. sense mark were converted to punch holes. 360 with 2540 reader/punch ... five stackers, two dedicated for reader, two dedicated for punch, one in the middle shared between reader&punch (stacker "3" for both reader & punch). large number of card trays (3000 cards/tray) ... fed in 2540 reader and selected to middle stacker. there would be validation done and if there was some problem, a blank card was punched behind it. all the registration cards were plain manila, the cards loaded in the punch had colored stripe across the top. when everything was done and all cards back in the trays ... "problems" could be spotted with the colored stripe card behind it. I wrote the stacker select code. 2540 reader/punch ... punch on the left, reader on the right http://www.columbia.edu/cu/computinghistory/2540.html 2540 decription http://www.bitsavers.org/pdf/ibm/25xx/A21-9033-1_2540_Card_Punch_Component_Description_1965.pdf my q&d conversion of gcard ios3270 to html: http://www.garlic.com/~lynn/gcard.html card reader/punch command codes http://www.garlic.com/~lynn/gcard.html#23 ANSI control characters http://www.garlic.com/~lynn/gcard.html#9 .... other trivia univ. admin had daily job that had started out on 407, it was then coverted to 1401 program that simulated 407 plug-board, which then coverted by some automatic process to 709 cobol, which then got converted to 360 cobol. the 360 cobol program still printed the 407 sense switches at the end of the run. one day, the program printed out some sense switch value that the operator wasn't familiar with. whole production operation was stopped for nearly two hrs while they tried to figure it out. eventually they decided to rerun to see if the same values came out. -- virtualization experience starting Jan1968, online at home since Mar1970 ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
