Mainframe, MVS and zOS Discussion

Happy 57th Birth Day MAINFRAME! The world's greatest computer system was launched on April 7, 1964.

Happy B'day indeed!

Never knew that, that should be declared as international holiday for companies using mainframes!

Happy Birthday Mainframe - you gave us bread and butter!

giskard reventlov wrote: ↑Mon Apr 12, 2021 4:27 pm 360p1.jpeg

Was the first 360 chip so small? Then why mainframes were so big?

small/big is irrelevant, what counts is the numbers of circuits on it
s/360 still had centrall memory of ferrite,
( 8KB would be the size of a shoe box )
and when one of the little rings stopped working the CE/FE would use
a tool like a knitting needle to thread the three/four wires used to address and read/write

That was a great, actually chip looked so compact for that time. I heard that mainframes were bigger than rooms so size mattered based on this reading I read somewhere.

Do you have more such picture, the description in them is interesting for me. Can you share more pics or can direct me to a link to further exploration.

Thanks again for sharing them.