5 ms·

My favorite is how MS started development of OS/2 2.0 and NT OS/2 around that time, and there was x86 segmentation back then but they decided not to use it for

by yuhong 9y ago

My favorite is how MS started development of OS/2 2.0 and NT OS/2 around that time, and there was x86 segmentation back then but they decided not to use it for 32-bit.

pjmlp 9y ago
Thanfully, segmentation was a royal pain with near and far pointers. Flat adressing was surely the feature I mostly envied from the Motorola 68000.
- yuhong 9y ago
  But with 32-bit segments you can just have one code and one data segment and maybe one stack segment.
  - pjmlp 9y ago
    Ah, from that point of view yes. However it doesn't bring much over MMU configuration regarding read and write accesses, right?
    - yuhong 9y ago
      You can't even create a single segment selector that is both writable and executable at all in x86.
      - pjmlp 9y ago
        Wasn't it possible on 16 bit protected mode segments? My Windows 3.x days have long faded away.
        yuhong 9y ago
        Using separate selectors.