dhinds@portia.Stanford.EDU (David Hinds) (03/01/90)
In article <29312@amdcad.AMD.COM>, phil@pepsi.amd.com (Phil Ngai) writes: > In principle a 386 PC should be able to run DOS jobs in a > virtual 8086 and any crashes should not affect the other jobs. > In practice I do not know if DV does this. I think DV still > runs in real mode even on a 386. However, OS/2 R 2 is supposed > to use the virtual 8086 mode. > QEMM puts an 80386 PC in virtual 86 mode. It is reasonably good at insulating things, but occasionally gets confused if you use unsupported hardware. So, for example, I can use super VGA software in DV, but if I try to ctrl-alt-del from an extended mode, DV is sometimes unable to restore the video card to a reasonable state. It will always recover when my ethernet drivers hang, though, which is nice because my PC/IP software is less than perfect. The virtual 8086 mode is crucial for all of QEMM's memory mapping functions, because the 80386's memory management can only be played with in protected mode. QEMM is the protected-mode supervisor for DV. - David Hinds dhinds@popserver.stanford.edu
larry@nstar.UUCP (Larry Snyder) (03/11/90)
In article <48f4c22d.20b6d@apollo.HP.COM>, nelson_p@apollo.HP.COM (Peter Nelson) writes: > > Does the UNIX you are using have a DOS compatibility mode? If so, > can you run *ANY* DOS programs in it or only well-behaved ones? > How much support does your sytem require? Is most of the software > you run plug'n'play or do you need to have the sevices of a "guru" > (perhaps yourself) to port programs, resolve problems and so forth? I run 386/ix on a 25 mhz '386 and have VP/ix installed. I have yet to come across a DOS program which could not be made to run on my machine - but then I didn't try *everything* -- The Northern Star Public Access Unix Site, Notre Dame, Indiana USA uucp: iuvax!ndmath!nstar!larry internet: larry@nstar USR HST 219-287-9020 * PEP 219-289-3745 * Hayes V9600 219-289-0286