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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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110
src/ints/ems.cpp
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@ -16,7 +16,7 @@
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* $Id: ems.cpp,v 1.38 2005-02-10 10:21:11 qbix79 Exp $ */
/* $Id: ems.cpp,v 1.39 2005-03-25 11:59:24 qbix79 Exp $ */
#include <string.h>
#include <stdlib.h>
@ -93,7 +93,7 @@ struct EMM_Handle {
static EMM_Handle emm_handles[EMM_MAX_HANDLES];
static EMM_Mapping emm_mappings[EMM_MAX_PHYS];
static Bitu call_int67,call_vdma;
struct MoveRegion {
Bit32u bytes;
@ -609,40 +609,84 @@ static Bitu INT4B_Handler() {
return CBRET_NONE;
}
void EMS_Init(Section* sec) {
class EMS: public Module_base {
private:
/* location in protected unfreeable memory where the ems name and callback are
* stored 32 bytes.*/
static Bit16u emsnameseg;
RealPt old4b_pointer,old67_pointer;
CALLBACK_HandlerObject call_vdma,int67;
public:
EMS(Section* configuration):Module_base(configuration){
/* Virtual DMA interrupt callback */
call_vdma=CALLBACK_Allocate();
CALLBACK_Setup(call_vdma,&INT4B_Handler,CB_IRET,"Int 4b vdma");
RealSetVec(0x4b,CALLBACK_RealPointer(call_vdma));
call_vdma.Install(&INT4B_Handler,CB_IRET,"Int 4b vdma");
call_vdma.Set_RealVec(0x4b);
Section_prop * section=static_cast<Section_prop *>(configuration);
if (!section->Get_bool("ems")) return;
BIOS_ZeroExtendedSize(true);
int67.Install(&INT67_Handler,CB_IRET,"Int 67 ems");
Bit16u call_int67=int67.Get_callback();
Section_prop * section=static_cast<Section_prop *>(sec);
if (!section->Get_bool("ems")) return;
BIOS_ZeroExtendedSize();
call_int67=CALLBACK_Allocate();
CALLBACK_Setup(call_int67,&INT67_Handler,CB_IRET,"Int 67 ems");
/* Register the ems device */
DOS_Device * newdev = new device_EMM();
DOS_AddDevice(newdev);
/* Register the ems device */
//TODO MAYBE put it in the class.
DOS_Device * newdev = new device_EMM();
DOS_AddDevice(newdev);
/* Add a little hack so it appears that there is an actual ems device installed */
char * emsname="EMMXXXX0";
if(!emsnameseg) emsnameseg=DOS_GetMemory(2); //We have 32 bytes
MEM_BlockWrite(PhysMake(emsnameseg,0xa),emsname,strlen(emsname)+1);
/* Copy the callback piece into the beginning, and set the interrupt vector to it*/
char buf[16];
MEM_BlockRead(PhysMake(CB_SEG,call_int67<<4),buf,0xa);
MEM_BlockWrite(PhysMake(emsnameseg,0),buf,0xa);
RealSetVec(0x67,RealMake(emsnameseg,0),old67_pointer);
/* Clear handle and page tables */
Bitu i;
for (i=0;i<EMM_MAX_HANDLES;i++) {
emm_handles[i].mem=0;
emm_handles[i].pages=NULL_HANDLE;
memset(&emm_handles[i].name,0,8);
}
for (i=0;i<EMM_MAX_PHYS;i++) {
emm_mappings[i].page=NULL_PAGE;
emm_mappings[i].handle=NULL_HANDLE;
}
}
~EMS() {
Section_prop * section=static_cast<Section_prop *>(m_configuration);
if (!section->Get_bool("ems")) return;
/* Undo Biosclearing */
BIOS_ZeroExtendedSize(false);
/* Remove ems device */
device_EMM newdev;
DOS_DelDevice(&newdev);
/* Add a little hack so it appears that there is an actual ems device installed */
char * emsname="EMMXXXX0";
Bit16u seg=DOS_GetMemory(2); //We have 32 bytes
MEM_BlockWrite(PhysMake(seg,0xa),emsname,strlen(emsname)+1);
/* Copy the callback piece into the beginning, and set the interrupt vector to it*/
char buf[16];
MEM_BlockRead(PhysMake(CB_SEG,call_int67<<4),buf,0xa);
MEM_BlockWrite(PhysMake(seg,0),buf,0xa);
RealSetVec(0x67,RealMake(seg,0));
/* Clear handle and page tables */
Bitu i;
for (i=0;i<EMM_MAX_HANDLES;i++) {
emm_handles[i].mem=0;
emm_handles[i].pages=NULL_HANDLE;
memset(&emm_handles[i].name,0,8);
}
for (i=0;i<EMM_MAX_PHYS;i++) {
emm_mappings[i].page=NULL_PAGE;
emm_mappings[i].handle=NULL_HANDLE;
/* Remove the emsname and callback hack */
char buf[32]= { 0 };
MEM_BlockWrite(PhysMake(emsnameseg,0),buf,32);
RealSetVec(0x67,old67_pointer);
/* Clear handle and page tables */
//TODO
}
};
static EMS* test;
void EMS_ShutDown(Section* sec) {
delete test;
}
void EMS_Init(Section* sec) {
test = new EMS(sec);
sec->AddDestroyFunction(&EMS_ShutDown,true);
}
//Initialize static members
Bit16u EMS::emsnameseg = 0;