[TUHS] Re: History of non-Bell C compilers?

On Wed, Mar 13, 2024, 9:28 AM Marc Rochkind <mrochkind(a)gmail.com> wrote: o 386 technology was involved. Venix could also run DOS. There is a kernel module (well .o) that handles it... Warner Marc > On Wed, Mar 13, 2024 at 8:38 AM Clem Cole <clemc(a)ccc.com> wrote: >> @Marc >>> On Tue, Mar 12, 2024 at 1:18 PM Marc Rochkind <mrochkind(a)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(a)gmail.com <mrochkind(a)gmail.com>*