28 Jun
2020
28 Jun
'20
5:11 p.m.
On 6/28/2020 5:18 PM, Jon Elson wrote:
On 06/28/2020 05:28 PM, ben via cctalk wrote:
Bad choice of words. I looked at a IBM 1130 only for a short time and
all mostly remember you needed to convert data for every I/O device.
Since punchcards I think had a 16 bit encoding, lack of byte data
was not big problem. Who used paper tape on a 360?
IBM punch cards had 12 rows of
holes.? For alpha encoding, logic in the
controller
converted that to EBCDIC or your machine's favorite internal character
interpretation.
On the IBM 360, there was a straight binary encoding using only 8 bits
for the data (80 bytes/card) or using all 12 bits of two character
positions to encode 3 bytes.? that way, you got 120 bytes/card.
I don't know any way to get 16-bit encoding on punch cards of that
format.? Maybe some other manufacturer's punch card format. We had paper tape read and punch on a 360/50 at
University or Missouri
at Rolla.? It was used for compatibility with the Data General
minicomputers there.? Only place I've ever seen paper tape on a 360.
Jon
Ben.