On Wed, 2008-04-02 at 13:21 -0500, Mikkel L. Ellertson wrote:
> On my punch cards they did. Every card had a number sequential to the
> sequence. The punch we used inserted them automatically. Well, the
> programming card did. The reference number used for calls may have been
> different, but I don't remember it.
> Our programs were HUGE, multiple trays. Each tray was denoted by the
> color of the diagonal line. We had 8 colors, so I guess we never had
> more than 8 trays, because I don't remember pairs of lines anywhere.
> Les H
Was the number actually punched in the card, or was it only printed
on the top of the card? Printed on the top of the card would not
require any modification of the card reader routine, and would not
eat up columns on the punch card. If I remember correctly, you only
If the number was punched, I could picture a program that would
re-order the program based on the number, if the cards were messed
up, but you would probably have needed a mini-computer to do that,
and feed it to the mainframe.
No you didn't, we used a card sorter, it was a mechanical affair, with
drum that fed the cards past brushes which would touch the drum through
the hole in the card. This would activate a relay which would pick up
the appropriate stack of feeding reeds which routed the card to the
correct one of 10 locations. You selected which column to sort, and
started with the highest order column first (If I remember correctly).
We also had mechanical tape readers, the small hole in the center of
the tape was the drive. Small fingers would sense the holes punched in
the tape. 5 level, caps+numbers+a limited number of punctuation marks.
I also helped clean and adjust the teleltypes. Do any of you know what
the "stunt box" is?