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> this ancient stuff is still supported and actively used. It sort of warms my heart that code for the IBM 360 (now IBM Z) and the IBM PC (now x86 PC) can stil
by musicale 1y ago
> this ancient stuff is still supported and actively used.
It sort of warms my heart that code for the IBM 360 (now IBM Z) and the IBM PC (now x86 PC) can still run on modern hardware decades later.
On one hand, we're stuck with the legacy of the past. But on the other hand, we can build on things and don't need to reinvent them unnecessarily.
- msla 1y agoHow much emulation is required to get System/360 code running on a modern IBM mainframe? Can the CPUs still run the original 32-bit code? Do CCWs and whatever other peripheral code still work?
- deleted 1y ago[deleted]
- zokier 1y agoIntels X86S proposal[1] gives perspective on this. Both in how there would be reasons to get rid of legacy, and how yet it still got shot down pretty quickly[2]. It's unfortunate that I don't think we ever got more explanation on it's termination, where did the opposition come from [1] https://news.ycombinator.com/item?id=36013257 https://news.ycombinator.com/item?id=36013257 [2] https://news.ycombinator.com/item?id=42468664 https://news.ycombinator.com/item?id=42468664
- msla 1y agoDid you reply to the wrong person?
- musicale 1y agoApparently user code can still run: "z/Architecture retains backward compatibility with previous 32-bit-data/31-bit-addressing architecture ESA/390 and its predecessors back to the 32-bit-data/24-bit-addressing System/360." https://en.wikipedia.org/wiki/Z/Architecture https://en.wikipedia.org/wiki/Z/Architecture