valter/dosbox-staging
1
0
Fork 0
Code Releases Activity

Set emm-version to 4.0. Added functions 0x50, 0x53, 0x58.

Browse source 
Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@231
This commit is contained in:
Ulf Wohlers 2002-08-27 10:46:37 +00:00
parent 4ef1d210a4
commit 812d7a0bf5
1 changed files with 46 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
src/ints/ems.cpp
View file

@ -35,7 +35,7 @@
#define EMM_MAX_PAGES (C_MEM_EMS_SIZE * 1024 / 16 )
#define EMM_MAX_PHYS 4 /* 4 16kb pages in pageframe */
#define EMM_VERSION 0x32
#define EMM_VERSION 0x40
#define NULL_HANDLE 0xffff
#define NULL_PAGE 0xffff
@ -311,6 +311,51 @@ static Bitu INT67_Handler(void) {
break;
}
break;
case 0x50: // Map/Unmap multiple handle pages
reg_ah = EMM_NO_ERROR;
switch (reg_al) {
case 0x00: // use physical page numbers
{ PhysPt data = SegPhys(ds)+reg_si;
for (int i=0; i<reg_cx; i++) {
Bit16u logPage = mem_readw(data); data+=2;
Bit16u physPage = mem_readw(data); data+=2;
reg_ah = EMM_MapPage(physPage,reg_dx,logPage);
if (reg_ah!=EMM_NO_ERROR) break;
};
} break;
case 0x01: // use segment address
{ PhysPt data = SegPhys(ds)+reg_si;
for (int i=0; i<reg_cx; i++) {
Bit16u logPage = mem_readw(data); data+=2;
Bit16u physPage = (mem_readw(data)-EMM_PAGEFRAME)/(0x1000/EMM_MAX_PHYS); data+=2;
reg_ah = EMM_MapPage(physPage,reg_dx,logPage);
if (reg_ah!=EMM_NO_ERROR) break;
};
}
break;
}
break;
case 0x53: // Set/Get Handlename
if (reg_al==0x00) { // Get Name not supported
LOG_ERROR("EMS:Get handle name not supported",reg_ah);
reg_ah=EMM_FUNC_NOSUP;
} else { // Set name, not supported but faked
reg_ah=EMM_NO_ERROR;
}
break;
case 0x58: // Get mappable physical array address array
if (reg_al==0x00) {
PhysPt data = SegPhys(es)+reg_di;
Bit16u step = 0x1000 / EMM_MAX_PHYS;
for (Bit16u i=0; i<EMM_MAX_PHYS; i++) {
mem_writew(data,EMM_PAGEFRAME+step*i); data+=2;
mem_writew(data,i); data+=2;
};
};
// Set number of pages
reg_cx = EMM_MAX_PHYS;
reg_ah = EMM_NO_ERROR;
break;
case 0xDE: /* VCPI Functions */
LOG_ERROR("VCPI Functions not supported");
reg_ah=EMM_FUNC_NOSUP;