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>IIRC, some extremely core IRS systems are actually written in IBM 360 Assembly. Yeah, this language is called PL/X and its specifically not for use outside th
by filereaper 5y ago
>IIRC, some extremely core IRS systems are actually written in IBM 360 Assembly.
Yeah, this language is called PL/X
and its specifically not for use outside the company. Its a language between Assembly and C and gives the programmer a huge amount of control over the hardware.
Going from PL/X to Java won't work as well as the JVM runtime has overheads that might not be acceptable for 31bit zSeries with its 2gb address space. Also compared to PL/X you're giving up a huge amount of control.
- skissane 5y agoAre you confusing IBM and IRS here? PL/X is an internal language used by IBM. To the best of my knowledge, the IRS don't directly use it. (There was a brief period, I think early 2000s, IBM let members of its partner program order IBM's PL/X compiler for a small fee. They withdrew that later but some ISVs did get their hands on it while that policy was in place. I think it is actually still sometimes available to ISVs if they pay $$$ and sign an NDA.)