Questions tagged [cdc]

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How many transistors in the CDC 1604?

The CDC 1604, released in 1960, was Seymour Cray's first supercomputer, and also one of the first computers made of transistors. (The IBM 7090 was released only the previous year.) How many ...
2
votes
2answers
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CDC 6600 system console

The CDC 6600 system console was a vector drawing system with a single font that also provided a way of drawing simple graphics (Wikipedia). In simple terms how does this vector drawing system work? ...
5
votes
3answers
350 views

Was this FORTRAN “extension” originated by IBM?

This question has been prompted by a recent question about the assigned GOTO operator. It appears that some early FORTRAN implementations supported a non-obvious construct: using an indexed variable ...
6
votes
2answers
405 views

Why did the CDC 6600 expand the word size to 60 bits?

According to http://www.quadibloc.com/comp/cp0201.htm The CDC 1604 used 48-bit floating point with 11 bits exponent and 36 bits mantissa. There was also a double precision format (which I believe was ...