X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f From: pischke DOT karl-heinz AT web DOT de (Karl-Heinz Pischke) Newsgroups: comp.os.msdos.djgpp Subject: Differences in LPT1 base address in protected/real mode? Date: 23 Feb 2005 02:22:30 -0800 Organization: http://groups.google.com Lines: 14 Message-ID: NNTP-Posting-Host: 217.5.150.146 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 1109154150 11834 127.0.0.1 (23 Feb 2005 10:22:30 GMT) X-Complaints-To: groups-abuse AT google DOT com NNTP-Posting-Date: Wed, 23 Feb 2005 10:22:30 +0000 (UTC) To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Hello World, if I try to get the LPT1 base address at 0x408 with inportw I get FFFFh back instead of the expected 7803h ... as I googled around just now I found out that there is a significant difference in the addressing of memory between real and protected mode ... I guess this is the crux of the 'phenomenon' ... unfortunately I didn't found any document so far that could help me with finding the correct address of 0040h:0008h in the protected mode ... is anyone here in the know how to get the LPT1 base adress from bios in protected mode? Greetings from Cologne, KH