X-Authentication-Warning: delorie.com: mail set sender to djgpp-bounces using -f From: dirw Newsgroups: comp.os.msdos.djgpp Subject: Re: How to access 0xFF800000 data ? Date: Wed, 2 Sep 2009 08:07:09 -0700 (PDT) Organization: http://groups.google.com Lines: 16 Message-ID: <77a18d6a-f649-47e2-a8da-7b6ba918d055@f18g2000prf.googlegroups.com> References: <850b568b-640c-435e-b6ca-deb8953ef1d5 AT y10g2000prf DOT googlegroups DOT com> <200909021448 DOT n82EmwgV030959 AT envy DOT delorie DOT com> NNTP-Posting-Host: 119.77.142.113 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 X-Trace: posting.google.com 1251904029 1020 127.0.0.1 (2 Sep 2009 15:07:09 GMT) X-Complaints-To: groups-abuse AT google DOT com NNTP-Posting-Date: Wed, 2 Sep 2009 15:07:09 +0000 (UTC) Complaints-To: groups-abuse AT google DOT com Injection-Info: f18g2000prf.googlegroups.com; posting-host=119.77.142.113; posting-account=EGBlIwoAAAAWTa2O3th8t-XpBeiiJ5gV User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; GTB6; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729),gzip(gfe),gzip(gfe) To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Dear Sir, Thanks for your reply. I try to access linear address 0xFF800000 (under big real mode). I already use _farpeekb (_dos_ds, 0xFFFC0) [real mode => segment : offset => F000:FFC0] to get data successfully!! But I still do NOT know how to access all of 4G memory data. Should I use DPMI function to read/write 0xFF800000 data ? If yes, could you please show me more information? Becasue I already study the DPMI specification, but I still do NOT know which function can meet my request. Thanks for your great help. BR, dirw