Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!watmath!clyde!rutgers!princeton!allegra!ulysses!mhuxt!aluxs!aluxz!revatt From: revatt@aluxz.UUCP Newsgroups: comp.sys.ibm.pc Subject: Re: getting COMMAND.COM to load from C: in DOS2.1? Message-ID: <821@aluxz.UUCP> Date: Wed, 10-Dec-86 10:19:51 EST Article-I.D.: aluxz.821 Posted: Wed Dec 10 10:19:51 1986 Date-Received: Sun, 14-Dec-86 09:48:40 EST References: <817@aluxz.UUCP> Distribution: na Organization: AT&T Bell Laboratories, Murray Hill, NJ Lines: 32 > > Can anyone tell me a workaround to get the transient portion of > COMMAND.COM to reload from something beside the A: drive? > I have tried COMMAND C:\ /P, but this just gets A: spinning and I have > to reboot. > > Other info: > I have a PCjr with 640K, two floppies, Impulse sidecar, and SPC 20M disk. > After a little checking [that I should I done earlier] I have determined that the problem is with the memory/clock add-on that I have. I think it has some routines in ROM that load the clock calendar automatically when the machine is booted. I know there is a bug somewhere that hangs the machine when a secondary command processor is loaded. There are programs floating around BBS's to patch things to allow a secondary COMMAND.COM to be loaded. Adding the /P option [i.e. COMMAND C:\ /P] probably wipes out the memory resident patch programs since it is like an original invocation of COMMAND.COM. Perhaps this means that the only fix is to actually replace the ROM with ones without the bug if they exist. If anyone has the details about the bug in the Impulse ROM, please mail me. ******************************************************************************** * Robert Evatt [ihnp4...]!aluxz!revatt * * AT&T Bell Labs (215)770-3570 * * Allentown, PA 18103 * ******************************************************************************** * usual disclaimers apply * ********************************************************************************