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|    comp.sys.raspberry-pi    |    Raspberry Pi computers & related hardwar    |    26,127 messages    |
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|    Message 25,187 of 26,127    |
|    The Natural Philosopher to All    |
|    Re: OT: horrible 8086 segmentation    |
|    27 Nov 24 11:40:07    |
      From: tnp@invalid.invalid              On 26/11/2024 17:37, Josef Möllers wrote:       > On 25.11.24 18:33, mm0fmf wrote:       > [...]       >       >> e.g.       >> "       >> // start of barrel       >> EventRec far* searchp = (EventRec far*) work.bufs;       >>       >> "       >>       >>       >> My eyes! My eyes! That was COMPACT model code, so 64k of code and 1MB       >> of data, code addresses were 16bit offsets to the CS reg and data was       >> far so 32 bits of segment and offset of DS or ES. And of course you       >> had to be extra careful of any pointer arithmetic as a far pointer       >> wrapped after 64k. You had to use slower HUGE pointers to get       >> automatic normalisation. God it was shit.       >>       >       > And to consider that, at that time, processors like MC68000 or NS32016       > were readily available.       >       Backwards compatibility.       DOS came from 8080 based CP/M , to run on an 8086, to where 8 bit code       could be easily ported.              And so we were stick with that architecture.              A prime example off 'mass marketing always wins over excellence'              and       'nothing succeeds like success'                            --       Labour - a bunch of rich people convincing poor people to vote for rich       people by telling poor people that "other" rich people are the reason       they are poor.              Peter Thompson              --- SoupGate-DOS v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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