On 05/26/2016 12:29 PM, Rich Alderson wrote:
A card is 80 columns wide.[1] (OK, there were special purpose 51-, 60-, and 66-column cards, but the data on them would fit into 80 columns.) There is no way to put more than 80 columns of data onto a Hollerith card.... Rich [1] OK, there are the Univac "90-column" cards, which are the same dimensions as the IBM Hollerith card. They record 90 6-bit characters across 45 columns, upper and lower halves of the card. The holes are circular and larger than the rectangular IBM holes. They would have to be special-cased in SimH.
You are forgetting the late-in-the-game (1969) IBM 96-column cards that used the little tiny holes in an almost square card. They were used on the IBM System/3 and perhaps others, but only had six bits per character (upper case only). Alan Frisbie _______________________________________________ Simh mailing list Simh@trailing-edge.com http://mailman.trailing-edge.com/mailman/listinfo/simh
