It's backwards compatible to really old versions. It wouldn't surprise me if 70%... | Hacker News

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devdas on Oct 8, 2020 | parent | context | favorite | on: IBM is splitting itself into two public companies

It's backwards compatible to really old versions. It wouldn't surprise me if 70% of that code was emulators for previous versions of the OS.

trasz on Oct 8, 2020 | [–]

There’s not much compatibility for old versions of the OS - IIRC anything older than the hardware itself is not supported at all. Backwards compatibility is for user code.

segfaultbuserr on Oct 8, 2020 | [–]

Even IBM S/360 is still being emulated.

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