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eat up some cycles for cdrom sector transfers (gets some cdrom speed checks to work better)

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3106
This commit is contained in:
Sebastian Strohhäcker 2008-02-19 17:45:33 +00:00
parent e8aac54d80
commit 615dab6a1f
1 changed files with 7 additions and 8 deletions
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15
src/dos/dos_mscdex.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: dos_mscdex.cpp,v 1.52 2008-02-06 21:56:32 c2woody Exp $ */
/* $Id: dos_mscdex.cpp,v 1.53 2008-02-19 17:45:33 c2woody Exp $ */
#include <string.h>
#include <ctype.h>
@ -27,6 +27,7 @@
#include "setup.h"
#include "support.h"
#include "bios.h"
#include "cpu.h"
#include "cdrom.h"
@ -628,27 +629,25 @@ bool CMscdex::GetUPC(Bit8u subUnit, Bit8u& attr, char* upc)
return dinfo[subUnit].lastResult = cdrom[subUnit]->GetUPC(attr,&upc[0]);
};
bool CMscdex::ReadSectors(Bit8u subUnit, bool raw, Bit32u sector, Bit16u num, PhysPt data)
{
bool CMscdex::ReadSectors(Bit8u subUnit, bool raw, Bit32u sector, Bit16u num, PhysPt data) {
if (subUnit>=numDrives) return false;
if ((4*num*2048+5) < CPU_Cycles) CPU_Cycles -= 4*num*2048;
else CPU_Cycles = 5;
dinfo[subUnit].lastResult = cdrom[subUnit]->ReadSectors(data,raw,sector,num);
return dinfo[subUnit].lastResult;
};
bool CMscdex::ReadSectorsMSF(Bit8u subUnit, bool raw, Bit32u start, Bit16u num, PhysPt data)
{
bool CMscdex::ReadSectorsMSF(Bit8u subUnit, bool raw, Bit32u start, Bit16u num, PhysPt data) {
if (subUnit>=numDrives) return false;
Bit8u min = (Bit8u)(start>>16) & 0xFF;
Bit8u sec = (Bit8u)(start>> 8) & 0xFF;
Bit8u fr = (Bit8u)(start>> 0) & 0xFF;
Bit32u sector = min*60*75+sec*75+fr - 150;
// TODO: Check, if num has to be converted too ?!
return ReadSectors(subUnit,raw,sector,num,data);
};
bool CMscdex::ReadSectors(Bit16u drive, Bit32u sector, Bit16u num, PhysPt data)
// Called from INT 2F
{
bool CMscdex::ReadSectors(Bit16u drive, Bit32u sector, Bit16u num, PhysPt data) {
return ReadSectors(GetSubUnit(drive),false,sector,num,data);
};