drudetb@infonode.ingr.com (Ted B. Drude) (08/29/90)
I am looking for a good reference guide on upgrading older machines from DOS 2.x to 3/4.x. I'm primarily interested in something that explains the upgrade process in detail (backup hard disk, reformat under new DOS, replace system files using SUBST, etc.) Also a quick look at the most important compatibility issues (Free RAM available, FCB problems, etc.). A book on the subject or a series of articles would be what I'm looking for, but any information is appreciated. - Ted Drude drudetb@ingr or !ingr!infonode!drudetb
rickert@mp.cs.niu.edu (Neil Rickert) (08/30/90)
In article <1990Aug29.141540.2806@infonode.ingr.com> drudetb@infonode.ingr.com (Ted B. Drude) writes: >I am looking for a good reference guide on upgrading older machines from >DOS 2.x to 3/4.x. I'm primarily interested in something that explains >the upgrade process in detail (backup hard disk, reformat under new Backing up is always a good idea. But forget about reformatting under the new DOS. Initially you don't want to do that. DOS 3./4. can handle hard disks formatted under DOS 2.x quite nicely. The converse is not true. Don't reformat until you are sure you don't wan't to ever run DOS 2.x again. All you should need to do is boot from the DOS 3.x/4.x floppy, then run the SYS command that came with your new DOS version. >DOS, replace system files using SUBST, etc.) Also a quick look at the Please use COPY or REPLACE to replace the system commands. SUBST does something quite different. >most important compatibility issues (Free RAM available, FCB problems, You should not have too many problems with DOS 3.x for compatibility. It will occupy more RAM, however. I can't vouch for DOS 4.x - I tried it and didn't like it. DOS 3.3 seems pretty reliable, and will have much the same look and feel as DOS 2.x. -- =*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*=*= Neil W. Rickert, Computer Science <rickert@cs.niu.edu> Northern Illinois Univ. DeKalb, IL 60115. +1-815-753-6940