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new configuration system. Runtime changing of settings possible.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@2162
This commit is contained in:
Peter Veenstra 2005-03-25 11:59:24 +00:00
parent da9013442a
commit d2b7bc58a6
3 changed files with 260 additions and 164 deletions
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90
src/ints/xms.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: xms.cpp,v 1.34 2005-02-10 10:21:11 qbix79 Exp $ */
/* $Id: xms.cpp,v 1.35 2005-03-25 11:59:24 qbix79 Exp $ */
#include <stdlib.h>
#include <string.h>
@ -101,7 +101,6 @@ Bitu XMS_GetEnabledA20(void)
return (IO_Read(0x92)&2)>0;
};
static Bit16u call_xms;
static RealPt xms_callback;
static XMS_Block xms_handles[XMS_HANDLES];
@ -341,36 +340,63 @@ Bitu XMS_Handler(void) {
// LOG(LOG_MISC,LOG_ERROR)("XMS: CALL Result: %02X",reg_bl);
return CBRET_NONE;
}
void XMS_Init(Section* sec) {
Section_prop * section=static_cast<Section_prop *>(sec);
if (!section->Get_bool("xms")) return;
Bitu i;
BIOS_ZeroExtendedSize();
DOS_AddMultiplexHandler(multiplex_xms);
call_xms=CALLBACK_Allocate();
CALLBACK_Setup(call_xms,&XMS_Handler,CB_RETF, "XMS Handler");
xms_callback=CALLBACK_RealPointer(call_xms);
/* Overide the callback with one that can be hooked */
phys_writeb(CB_BASE+(call_xms<<4)+0,(Bit8u)0xeb); //jump near
phys_writeb(CB_BASE+(call_xms<<4)+1,(Bit8u)0x03); //offset
phys_writeb(CB_BASE+(call_xms<<4)+2,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+3,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+4,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+5,(Bit8u)0xFE); //GRP 4
phys_writeb(CB_BASE+(call_xms<<4)+6,(Bit8u)0x38); //Extra Callback instruction
phys_writew(CB_BASE+(call_xms<<4)+7,call_xms); //The immediate word
phys_writeb(CB_BASE+(call_xms<<4)+9,(Bit8u)0xCB); //A RETF Instruction
for (i=0;i<XMS_HANDLES;i++) {
xms_handles[i].free=true;
xms_handles[i].mem=-1;
xms_handles[i].size=0;
xms_handles[i].locked=0;
class XMS: public Module_base {
private:
CALLBACK_HandlerObject callbackhandler;
public:
XMS(Section* configuration):Module_base(configuration){
Section_prop * section=static_cast<Section_prop *>(configuration);
if (!section->Get_bool("xms")) return;
Bitu i;
BIOS_ZeroExtendedSize(true);
DOS_AddMultiplexHandler(multiplex_xms);
callbackhandler.Install(&XMS_Handler,CB_RETF, "XMS Handler");
xms_callback=callbackhandler.Get_RealPointer();
Bit16u call_xms=callbackhandler.Get_callback();
/* Override the callback with one that can be hooked */
phys_writeb(CB_BASE+(call_xms<<4)+0,(Bit8u)0xeb); //jump near
phys_writeb(CB_BASE+(call_xms<<4)+1,(Bit8u)0x03); //offset
phys_writeb(CB_BASE+(call_xms<<4)+2,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+3,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+4,(Bit8u)0x90); //NOP
phys_writeb(CB_BASE+(call_xms<<4)+5,(Bit8u)0xFE); //GRP 4
phys_writeb(CB_BASE+(call_xms<<4)+6,(Bit8u)0x38); //Extra Callback instruction
phys_writew(CB_BASE+(call_xms<<4)+7,call_xms); //The immediate word
phys_writeb(CB_BASE+(call_xms<<4)+9,(Bit8u)0xCB); //A RETF Instruction
for (i=0;i<XMS_HANDLES;i++) {
xms_handles[i].free=true;
xms_handles[i].mem=-1;
xms_handles[i].size=0;
xms_handles[i].locked=0;
}
/* Disable the 0 handle */
xms_handles[0].free = false;
}
/* Disable the 0 handle */
xms_handles[0].free = false;
~XMS(){
Section_prop * section = static_cast<Section_prop *>(m_configuration);
if (!section->Get_bool("xms")) return;
/* Undo biosclearing */
BIOS_ZeroExtendedSize(false);
/* Remove Multiplex */
DOS_DelMultiplexHandler(multiplex_xms);
/* Free used memory while skipping the 0 handle */
for (Bitu i = 1;i<XMS_HANDLES;i++)
if(!xms_handles[i].free) XMS_FreeMemory(i);
}
};
static XMS* test;
void XMS_ShutDown(Section* sec) {
delete test;
}
void XMS_Init(Section* sec) {
test = new XMS(sec);
sec->AddDestroyFunction(&XMS_ShutDown,true);
}