Mail Archives: djgpp/1998/10/09/14:16:50
| From: | Seyil Yoon <wings AT interlog DOT com>
|
| Newsgroups: | comp.os.msdos.djgpp
|
| Subject: | Newbie to DJGPP2.01 from BC5.02 struggling with int13h stuff.
|
| Date: | Fri, 09 Oct 1998 14:07:38 -0400
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| Organization: | UUNET Canada News Transport
|
| Lines: | 102
|
| Message-ID: | <361E50EA.42398FCE@interlog.com>
|
| NNTP-Posting-Host: | 209.47.85.27
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| Mime-Version: | 1.0
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| X-Mailer: | Mozilla 4.06 [en] (Win98; U)
|
| To: | djgpp AT delorie DOT com
|
| DJ-Gateway: | from newsgroup comp.os.msdos.djgpp
|
| Reply-To: | djgpp AT delorie DOT com
|
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Having previously worked in BC5.02, there are a bunch of issues
that I never had to deal with that I now do because of DJGPP2.01.
In BC5.02, here is what I would have written:
void
Int13Read( unsigned char ucDrive,
unsigned short usCyl,
unsigned char ucHead,
unsigned char ucSect,
unsigned char ucSectorsToRead,
far char * fpcBuffer)
{
union REGS InRegs;
union REGS OutRegs;
struct SREGS SegRegs;
unsigned char ucSectorMask;
ucSectorMask = (unsigned char) (usCyl >> 2);
ucSectorMask |= ucSect;
InRegs.h.ah = 2;
InRegs.h.al = ucSectorsToRead;
InRegs.h.ch = (unsigned char) usCyl;
InRegs.h.cl = ucSectorMask;
InRegs.h.dh = ucHead;
InRegs.h.dl = ucDrive;
SegRegs.es = FP_SEG(fpcBuffer);
InRegs.x.bx = FP_OFF(fpcBuffer);
int86x(0x13, &InRegs, &OutRegs, &SegRegs);
}
In DJGPP2.01, I realize that int86() will not work in this case
(since int13h/ah=2 is not on the list of "supported" functions).
But after reading the FAQ and the help, I am not sure how exactly
I should be tackling this. I have the feeling it has to do with
__dpmi_regs,
__dpmi_int, and some other stuff which I don't understand completely.
Any help would be greatly appreciated.
Seyil Yoon (wings AT datarec DOT com)
Research Programmer, Data Recovery Labs (http://www.datarec.com)
P.S. Thanks to all who answered my question regarding namespaces.
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Having previously worked in BC5.02, there are a bunch of issues
<BR>that I never had to deal with that I now do because of DJGPP2.01.
<P>In BC5.02, here is what I would have written:<TT></TT>
<P><TT>void</TT>
<BR><TT>Int13Read( unsigned char ucDrive,</TT>
<BR><TT> unsigned
short usCyl,</TT>
<BR><TT> unsigned
char ucHead,</TT>
<BR><TT> unsigned
char ucSect,</TT>
<BR><TT> unsigned
char ucSectorsToRead,</TT>
<BR><TT> far
char * fpcBuffer)</TT>
<BR><TT>{</TT>
<BR><TT> union REGS InRegs;</TT>
<BR><TT> union REGS OutRegs;</TT>
<BR><TT> struct SREGS SegRegs;</TT><TT></TT>
<P><TT> unsigned char ucSectorMask;</TT><TT></TT>
<P><TT> ucSectorMask = (unsigned char) (usCyl >> 2);</TT>
<BR><TT> ucSectorMask |= ucSect;</TT><TT></TT>
<P><TT> InRegs.h.ah = 2;</TT>
<BR><TT> InRegs.h.al = ucSectorsToRead;</TT>
<BR><TT> InRegs.h.ch = (unsigned char) usCyl;</TT>
<BR><TT> InRegs.h.cl = ucSectorMask;</TT>
<BR><TT> InRegs.h.dh = ucHead;</TT>
<BR><TT> InRegs.h.dl = ucDrive;</TT>
<BR><TT> SegRegs.es = FP_SEG(fpcBuffer);</TT>
<BR><TT> InRegs.x.bx = FP_OFF(fpcBuffer);</TT><TT></TT>
<P><TT> int86x(0x13, &InRegs, &OutRegs, &SegRegs);</TT>
<BR><TT>}</TT>
<P>In DJGPP2.01, I realize that int86() will not work in this case
<BR>(since int13h/ah=2 is not on the list of "supported" functions).
<BR>But after reading the FAQ and the help, I am not sure how exactly
<BR>I should be tackling this. I have the feeling it has to do with __dpmi_regs,
<BR>__dpmi_int, and some other stuff which I don't understand completely.
<BR>Any help would be greatly appreciated.
<P>Seyil Yoon (wings AT datarec DOT com)
<BR>Research Programmer, Data Recovery Labs (<A HREF="http://www.datarec.com">http://www.datarec.com</A>)
<P>P.S. Thanks to all who answered my question regarding namespaces.</HTML>
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