[TUHS] History of non-Bell C compilers?

[Marc Rochkind]

@Clem Cole <clemc at ccc.com>,

I don't remember what it was. But, the XT had an 8088, so certainly no 386
technology was involved.

Marc

On Wed, Mar 13, 2024 at 8:38 AM Clem Cole <clemc at ccc.com> wrote:

> @Marc
>
> On Tue, Mar 12, 2024 at 1:18 PM Marc Rochkind <mrochkind at gmail.com> wrote:
>
>> At a trade show, I bought a utility that allowed me to run PC-DOS under
>> PC/IX. I'm sure it wasn't a virtual machine. Rather, it just swapped back
>> and forth. (Guessing a bit there.)
>>
> Hmm ... you sure it was not either VPIX or DOS/Merge -- ISC built VPIX in
> cooperation with the Phoenix Tech folks for PC/IX. I always bought a copy
> with it, but it may have been an option.   LCC did DOS/Merge originally as
> part of the AIX work for IBM and would become a core part of OS/2 Warp
> IIRC.  Both Merge and VPIX had some rough edges but certainly worked fine
> for DOS 3.3 programs.  The issue tended to be Win and DOS graphics-based
> programs/games that played fast and loose, bypassing the DOS OS interface
> and accessing the HW directly.  For instance, I never got the flight
> simulator (Air War over Germany) for Dad's WWII plane (P-47 Thunderbolt) to
> run under either (i.e., only under DOS directly on the HW. FWIW: In that
> mode, Dad said the simulator flew a lot like how he remembered it).
>
> Both Merge and VPIX used the 386 VM support and a bunch of work in the
> core OS.   Heinz would have to fill us in here.  The version of the 386
> port ISC delivered to AT&T and Intel only had the kernel changes to allow
> the VM support for VPIX to be linked in, but it was not there.   IICR (and
> I'm not sure I am) is that Merge could run on PC/IX also, but you had to
> replace a couple of kernel modules.  It certainly would work on the AT&T
> and Intel versions.
> ᐧ
>


-- 
*My new email address is mrochkind at gmail.com <mrochkind at gmail.com>*
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