Lahey Support
08-15-2003, 01:19 AM
Just seen Wen Chiang's e-mail question about old Fortran program.
What is:
DATA S/Z3C100000/ ?
The data element noted in his message is a hexadecimal value
for a floating point number stored aa 3c-10-00-00. The Z was the symbol
them used to indicate hecadecimal notation.
Back then on the IBM7070 we stored the other way ("big end
first"), with the signed exponent in the first memory position. Negative
number constants and even data text was initialized this way with Z.
T.B.Wright
(of IBM 1961-64; remember "Formula Translator 4/1/61" written by John
Backus ?)
What is:
DATA S/Z3C100000/ ?
The data element noted in his message is a hexadecimal value
for a floating point number stored aa 3c-10-00-00. The Z was the symbol
them used to indicate hecadecimal notation.
Back then on the IBM7070 we stored the other way ("big end
first"), with the signed exponent in the first memory position. Negative
number constants and even data text was initialized this way with Z.
T.B.Wright
(of IBM 1961-64; remember "Formula Translator 4/1/61" written by John
Backus ?)