X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f From: Thomas8675309 AT yahoo DOT com (Tom) Newsgroups: comp.os.msdos.djgpp Subject: Re: Improved dos bos for bash with scollable window ??? Date: 25 Nov 2003 13:56:05 -0800 Organization: http://groups.google.com Lines: 20 Message-ID: <7b68d58f.0311251356.3a66c7ee@posting.google.com> References: <25a1dc7c DOT 0311240930 DOT 79217c02 AT posting DOT google DOT com> <7b68d58f DOT 0311250740 DOT 5a38c106 AT posting DOT google DOT com> NNTP-Posting-Host: 63.72.148.162 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Trace: posting.google.com 1069797366 21457 127.0.0.1 (25 Nov 2003 21:56:06 GMT) X-Complaints-To: groups-abuse AT google DOT com NNTP-Posting-Date: Tue, 25 Nov 2003 21:56:06 +0000 (UTC) To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Hans-Bernhard Broeker wrote: > Your typical DOS program facing the need to e.g. control the cursor or > display colours will typically do so by bypassing DOS completely and > instead write directly into the videocard's memory, or at least resort > to BIOS calls. That kind of activity doesn't leave a trace that the > XP console window or any other hypothetical xterm-alike could > reasonably record and replay once you start scrolling around. To even > allow the program to hack the screen this way in spite of XP being a > protected OS, the console window has to switch itself into a legacy > compability mode, in which it acts as a virtual VGA card, with > simulated frame buffers for the app to poke around in, and a simulated > BIOS it can call. This mode of operation is fundamentally > incompatible with the concept of a scrollable terminal window. Thanks for the additional explanation. I get it now. Best regards, Tom