Ah but that's a non-IBM 5081 card which I am not sure is compatible with the IBM 1401 as it used the 1402 card reader which was typically used in Column Binary mode.
I have a refurbished IBM 1401 out in the shed (it's a big shed)...
"Over 12,000 units were produced and many were leased or resold in less developed countries after they were replaced with newer technology."
I'll get my coat...
âIf this is the way Queen Victoria treats her prisoners, she doesn't deserve to have any.â
gEd Wrote:Ah but that's a non-IBM 5081 card which I am not sure is compatible with the IBM 1401 as it used the 1402 card reader which was typically used in Column Binary mode.
The McCORQUODALE branded cards were fine - that's what we used... by the hundreds of thousands - significantly cheaper than the IBM branded ones..
At one time, I could read these cards and I had the feeling that your card said "V" but my curiosity got the better of me so I dug out my 40 year old IBM System/360 Reference Data card (PN: GX20-1703-9) and sure enough... 0-5 is upper case V in EBCDIC...
2015-04-08, 10:49 PM (This post was last modified: 2015-04-08, 11:30 PM by gEd.)
Last week, I was connected to the RETAIN mainframe as normal and decided to tell my son why the display was only 80 characters wide and how this relates back to the IBM card introduced in 1928.....
Crazy to think that in the mid-1950s, sales of punched card accounted for 30% of IBMs profit. How could they possibly fail...
âIf this is the way Queen Victoria treats her prisoners, she doesn't deserve to have any.â