The PS/2 model 50 was originally built with just a 286. But it was
notable as a brilliant piece of mechanical engineering done by one
fairly young engineer (mid 20's) whose name I can't recall. It could be
totally disassembled without any tools save for a small plastic tool
about 2" long that was attached inside the case. Funny, I can't
remember exactly what it was used for. It wasn't truly necessary but
did make the one job that it was designed for easier without risking a
broken finger nail. Since you have one you probably know what it is.
Similar designs I'm sure have been done by many since but, AFAIK, it was
the first PC that didn't need at least a screwdriver to get it apart. I
believe the model 70 was the first PS/2 that sported a 386 and I think
it shared the same case or at least the same case design.
Chuck Norcutt
Ian Manners wrote:
> Hi Chuck,
>
>> OS/2 v2.0 was the first version of OS/2 to implement the 386's 32-bit
>> flat memory model. There was still some 16 bit code around and
>> especially in device drivers but the OS can't run on a 286 with its
>> segmented memory architecture. The 386 will run 286 code but not
>> vice-versa.
>
> After that last email you sent, I realise now that the IBM PS/2 Model 50
> I had (still on it actually, just havent run it for many years) OS/2 v2.11 on
> has a 386 upgrade in it (Hyperace). That is where my confusion is setting
> in. Or maybe I'm just getting to old with to much junk upstairs (the brain,
> not the roof ;-))
>
> Cheers
> Ian Manners
> http://www.comkal.net/
>
>
> A closed mouth gathers no foot.
>
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