Hi,
----- Mensaje Original ----- Remitente: Michael Devore [EMAIL PROTECTED] Destinatario: [email protected] Fecha: Jueves, Enero 13, 2005 1:21am Asunto: Re: [Freedos-devel] Questions on EMM386 (part2 and last) >At 03:57 PM 1/12/2005 +0300, Arkady V.Belousov wrote: >>MD> Nothing on an application level should need to disable A20 and >if it did, >>MD> it would crash things loaded in a UMB due to loss of memory >access, not to >>--------------------------------------^^^ HMA ? >>MD> mention DOS image loaded high going away. Most interrupts would >>MD> immediately fail. >> >> Why? They should fail only if they point into HMA and >performed when >>A20 is off. >If you disable A20, then it's off, right? Important interrupts can >go into >DOS territory No HMA when an interrupt that goes there is triggered >== bad Well, just to clarify: I didn't mean that you actually disable A20 line really, but that you would map the HMA pages into the pages at the begining of the memory. Aitor ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Freedos-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/freedos-devel
