Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!i2unix!inria!chorus!opera!mir From: mir@opera.chorus.fr (Adam Mirowski) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: New Modems, Telebit Fails under impairments in PC Magazine tests Message-ID: <7368@chorus.fr> Date: 27 Dec 90 11:32:40 GMT References: <7366@chorus.fr> <1990Dec26.175746.24208@panix.uucp> Sender: mir@chorus.fr Reply-To: mir@opera.chorus.fr (Adam Mirowski) Organization: Chorus systemes, Saint Quentin en Yvelines, France Lines: 27 In article <1990Dec26.175746.24208@panix.uucp>, schuster@panix.uucp (Michael Schuster) writes: %% In article <7366@chorus.fr> mir@opera.chorus.fr (Adam Mirowski) writes: %% >Wrong! :-) MS-DOS has IO.SYS, MSDOS.SYS and COMMAND.COM. %% >IBMBIO.COM and IBMDOS.COM are for PC-DOS. %% %% Wrong again. The names of the MS-DOS hidden files seem to vary among OEM's. %% Some use IO.SYS and MSDOS>SYS; others, perhaps for aping IBM more completely, %% use IBMBIO.COM and IBMDOS.COM. Take a look, for instance, at EPSON MS-DOS; %% they use the IBM conventions for hidden files. I know this. That's why I've put the smiley. In fact, on most DOS I have used there were IBM*.COM files, although only MicroSoft was mentionned in the copyrights besides the OEM. I have once found a program, named PCLAN.COM (on a Toshiba) which only purpose (after a disassembly) was to create those IBM*.COM files in the root directory of the A disk. But IBM PC-LAN program doesn't need to see those files to run, as I have check later. Could some programs be allergical to non IBM*.COM hidden files? The general question is how is an OEM DOS version eleborated. Which part is doing this? Who is choosing the names and the code repartition between IBMBIO/IO and IBMDOS.COM/MSDOS.SYS (IO.SYS is much smaller than IBMBIO, MSDOS.SYS much bigger than IBMDOS.COM)? And the last but not the least, how much does it cost for an OEM to have "it's own" DOS? -- Adam Mirowski, mir@chorus.fr (FRANCE), tel. +33 (1) 30-64-82-00 or 74 Chorus systemes, 6, av.Gustave Eiffel, 78182 Saint-Quentin-en-Yvelines CEDEX