BillWoodger

5 ms·

1.
by BillWoodger 9y ago
JCL is not a language. It is no more than "the language, in the sense of words and symbols, that you use to define resources to a Job Step".
2.
by BillWoodger 9y ago
Moore's runs into the laws of physics: https://www.forbes.com/sites/gregsatell/2016/02/24/how-ibm-p... Mainframe DASD is the same as "X86" disks, at least for those using "storag
3.
by BillWoodger 9y ago
What "virtualization magic" do you mean? You mean taking a program which hasn't been recompiled since 1970 and running it (the 1970 executable) on hardware released in 2014 under an OS from 2015? Of course, it will work. Ther
4.
by BillWoodger 9y ago
Byte by byte? Where does that come into it? I don't think there's much Production work on a Commodore 64 these days. You don't have to "worry" about anything. I/O is asynchronous, but your High-level Language d
5.
by BillWoodger 9y ago
You don't have to know, and many working on Manframes don't. No-one outside the Mainframe should need to know, unless you get the stupid "oh, but they refuse to change the program" for a data-transfer (read, "we s
6.
by BillWoodger 9y ago
As to the interchange of data, unless you run into a bunch of lazy Mainframers (they do exist) there's a lot they can do at almost zero "cost" to make it easy for you. It is not often there is a genuine case that anyone outsi
7.
by BillWoodger 9y ago
Thanks for looking, I hope you didn't feel it lost in a bad way :-)
8.
by BillWoodger 9y ago
Correct about the I/O. You can let the space-bar auto-repeat 1919 times, for instance (nearest equivalent to circling the mouse) and the CPU cost is... zero. When, exactly, do you think that the X86 surpassed the Mainframe processors,
9.
by BillWoodger 9y ago
If you want DB2 in the operating system, you need an "IBM midrange" or iSeries. Much shorter code-path, much faster. If you want the fastest record access, the operating system z/TPF for the IBM Mainframe. Not only just fixed