Quote: Originally Posted by Barman58
Now That's a REAL programming Language . (IBM BAL - Basic Assembly Language).
(picture From Rob's RPF site -- I've seen that function but I've actually got the "Real ISPF/PDF" running on the emulator. RPF was pretty good for this however.
Amazing to think what you could do on those machines even
though until later on in it's life (ESA and os/Z) you only had 16 bit addressing.
Actually using this emulator with MVS38J etc should be a mandatory course in designing OS'es.
MVS was a classic SECURE OS and it's all STILL in the public domain with a lot source code available as well. The OS design still contains most elements required in a SECURE multi-user Operating Sysytem.
I can just imagine a lot of people used to "Twitter" and having short attention spans generally attempting to do what was then called a "Complete System Generation" on this OS or apply fixes to it using the IBM modification program SMP (System modification program) which WAS a dog to get right.