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On 2024-11-27, The Natural Philosopher <
tnp@invalid.invalid> wrote:
> On 26/11/2024 17:37, Josef M├╢llers wrote:
>
>> On 25.11.24 18:33, mm0fmf wrote:
>>
>>> 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.
Intel put the "backward" in "backward compatible".
--
/~\\ Charlie Gibbs | Growth for the sake of
\\ / <
cgibbs@kltpzyxm.invalid> | growth is the ideology
X I`m really at ac.dekanfrus | of the cancer cell.
/ \\ if you read it the right way. | -- Edward Abbey
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