Bit8u VESA_GetSVGAInformation(Bit16u seg,Bit16u off) {
/* Fill 256 byte buffer with VESA information */
PhysPt buffer=PhysMake(seg,off);
Bitu i;
bool vbe2=false;Bit16u vbe2_pos;
Bitu id=mem_readd(buffer);
if (((id==0x56424532)||(id==0x32454256)) && (!int10.vesa_oldvbe)) vbe2=true;
if (vbe2) {
for (i=0;i<0x200;i++) mem_writeb(buffer+i,0);
} else {
for (i=0;i<0x100;i++) mem_writeb(buffer+i,0);
}
/* Fill common data */
MEM_BlockWrite(buffer,(void *)"VESA",4); //Identification
if (!int10.vesa_oldvbe) mem_writew(buffer+0x04,0x200); //Vesa version 2.0
else mem_writew(buffer+0x04,0x102); //Vesa version 1.2
if (vbe2) {
vbe2_pos=256+off;
mem_writed(buffer+0x06,RealMake(seg,vbe2_pos));
for (i=0;i<sizeof(string_oem);i++) real_writeb(seg,vbe2_pos++,(Bit8u)string_oem[i]);
mem_writew(buffer+0x14,0x200); //VBE 2 software revision
mem_writed(buffer+0x16,RealMake(seg,vbe2_pos));
for (i=0;i<sizeof(string_vendorname);i++) real_writeb(seg,vbe2_pos++,(Bit8u)string_vendorname[i]);
mem_writed(buffer+0x1a,RealMake(seg,vbe2_pos));
for (i=0;i<sizeof(string_productname);i++) real_writeb(seg,vbe2_pos++,(Bit8u)string_productname[i]);
mem_writed(buffer+0x1e,RealMake(seg,vbe2_pos));
for (i=0;i<sizeof(string_productrev);i++) real_writeb(seg,vbe2_pos++,(Bit8u)string_productrev[i]);
} else {
vbe2_pos=0x20+off;
mem_writed(buffer+0x06,int10.rom.oemstring); //Oemstring
}
if (vesa_bios_modelist_in_info) {
/* put the modelist into the VBE struct itself, as modern BIOSes like to do.
* NOTICE: This limits the modelist to what is able to fit! Extended modes may not fit, which is why the option is OFF by default. */
uint16_t modesg = int10.rom.vesa_modes >> 16;
uint16_t modoff = int10.rom.vesa_modes & 0xFFFF;
uint16_t m;
mem_writed(buffer+0x0e,RealMake(seg,vbe2_pos)); //VESA Mode list
do {
if (vbe2) {
if (vbe2_pos >= (509+off)) break;
}
else {
if (vbe2_pos >= (253+off)) break;
}
m = real_readw(modesg,modoff);
if (m == 0xFFFF) break;
real_writew(seg,vbe2_pos,m);
vbe2_pos += 2;
modoff += 2;
} while (1);
real_writew(seg,vbe2_pos,0xFFFF);
}
else {
static Bitu MOUSE_BD_Handler(void) {
// the stack contains offsets to register values
Bit16u raxpt=real_readw(SegValue(ss),reg_sp+0x0a);
Bit16u rbxpt=real_readw(SegValue(ss),reg_sp+0x08);
Bit16u rcxpt=real_readw(SegValue(ss),reg_sp+0x06);
Bit16u rdxpt=real_readw(SegValue(ss),reg_sp+0x04);
// read out the actual values, registers ARE overwritten
Bit16u rax=real_readw(SegValue(ds),raxpt);
reg_ax=rax;
reg_bx=real_readw(SegValue(ds),rbxpt);
reg_cx=real_readw(SegValue(ds),rcxpt);
reg_dx=real_readw(SegValue(ds),rdxpt);
// LOG_MSG("MOUSE BD: %04X %X %X %X %d %d",reg_ax,reg_bx,reg_cx,reg_dx,POS_X,POS_Y);
// some functions are treated in a special way (additional registers)
switch (rax) {
case 0x09: /* Define GFX Cursor */
case 0x16: /* Save driver state */
case 0x17: /* load driver state */
SegSet16(es,SegValue(ds));
break;
case 0x0c: /* Define interrupt subroutine parameters */
case 0x14: /* Exchange event-handler */
if (reg_bx!=0) SegSet16(es,reg_bx);
else SegSet16(es,SegValue(ds));
break;
case 0x10: /* Define screen region for updating */
reg_cx=real_readw(SegValue(ds),rdxpt);
reg_dx=real_readw(SegValue(ds),rdxpt+2);
reg_si=real_readw(SegValue(ds),rdxpt+4);
reg_di=real_readw(SegValue(ds),rdxpt+6);
break;
default:
break;
}
INT33_Handler();
// save back the registers, too
real_writew(SegValue(ds),raxpt,reg_ax);
real_writew(SegValue(ds),rbxpt,reg_bx);
real_writew(SegValue(ds),rcxpt,reg_cx);
real_writew(SegValue(ds),rdxpt,reg_dx);
switch (rax) {
case 0x1f: /* Disable Mousedriver */
real_writew(SegValue(ds),rbxpt,SegValue(es));
break;
case 0x14: /* Exchange event-handler */
real_writew(SegValue(ds),rcxpt,SegValue(es));
break;
default:
break;
}
reg_ax=rax;
return CBRET_NONE;
}
static void Tandy_SetupTransfer(PhysPt bufpt,bool isplayback) {
Bitu length=real_readw(0x40,0xd0);
if (length==0) return; /* nothing to do... */
if ((tandy_sb.port==0) && (tandy_dac.port==0)) return;
Bit8u tandy_irq = 7;
if (tandy_sb.port) tandy_irq = tandy_sb.irq;
else if (tandy_dac.port) tandy_irq = tandy_dac.irq;
Bit8u tandy_irq_vector = tandy_irq;
if (tandy_irq_vector<8) tandy_irq_vector += 8;
else tandy_irq_vector += (0x70-8);
/* revector IRQ-handler if necessary */
RealPt current_irq=RealGetVec(tandy_irq_vector);
if (current_irq!=tandy_DAC_callback[0]->Get_RealPointer()) {
real_writed(0x40,0xd6,current_irq);
RealSetVec(tandy_irq_vector,tandy_DAC_callback[0]->Get_RealPointer());
}
Bit8u tandy_dma = 1;
if (tandy_sb.port) tandy_dma = tandy_sb.dma;
else if (tandy_dac.port) tandy_dma = tandy_dac.dma;
if (tandy_sb.port) {
IO_Write(tandy_sb.port+0xc,0xd0); /* stop DMA transfer */
IO_Write(0x21,IO_Read(0x21)&(~(1<<tandy_irq))); /* unmask IRQ */
IO_Write(tandy_sb.port+0xc,0xd1); /* turn speaker on */
} else {
IO_Write(tandy_dac.port,IO_Read(tandy_dac.port)&0x60); /* disable DAC */
IO_Write(0x21,IO_Read(0x21)&(~(1<<tandy_irq))); /* unmask IRQ */
}
IO_Write(0x0a,0x04|tandy_dma); /* mask DMA channel */
IO_Write(0x0c,0x00); /* clear DMA flipflop */
if (isplayback) IO_Write(0x0b,0x48|tandy_dma);
else IO_Write(0x0b,0x44|tandy_dma);
/* set physical address of buffer */
Bit8u bufpage=(Bit8u)((bufpt>>16)&0xff);
IO_Write(tandy_dma*2,(Bit8u)(bufpt&0xff));
IO_Write(tandy_dma*2,(Bit8u)((bufpt>>8)&0xff));
switch (tandy_dma) {
case 0: IO_Write(0x87,bufpage); break;
case 1: IO_Write(0x83,bufpage); break;
case 2: IO_Write(0x81,bufpage); break;
case 3: IO_Write(0x82,bufpage); break;
}
real_writeb(0x40,0xd4,bufpage);
/* calculate transfer size (respects segment boundaries) */
Bit32u tlength=length;
if (tlength+(bufpt&0xffff)>0x10000) tlength=0x10000-(bufpt&0xffff);
real_writew(0x40,0xd0,(Bit16u)(length-tlength)); /* remaining buffer length */
tlength--;
/* set transfer size */
IO_Write(tandy_dma*2+1,(Bit8u)(tlength&0xff));
IO_Write(tandy_dma*2+1,(Bit8u)((tlength>>8)&0xff));
Bit16u delay=(Bit16u)(real_readw(0x40,0xd2)&0xfff);
Bit8u amplitude=(Bit8u)((real_readw(0x40,0xd2)>>13)&0x7);
if (tandy_sb.port) {
IO_Write(0x0a,tandy_dma); /* enable DMA channel */
/* set frequency */
IO_Write(tandy_sb.port+0xc,0x40);
IO_Write(tandy_sb.port+0xc,256-delay*100/358);
/* set playback type to 8bit */
if (isplayback) IO_Write(tandy_sb.port+0xc,0x14);
else IO_Write(tandy_sb.port+0xc,0x24);
/* set transfer size */
IO_Write(tandy_sb.port+0xc,(Bit8u)(tlength&0xff));
IO_Write(tandy_sb.port+0xc,(Bit8u)((tlength>>8)&0xff));
} else {
void DOS_SetupMemory(void) {
/* Let dos claim a few bios interrupts. Makes DOSBox more compatible with
* buggy games, which compare against the interrupt table. (probably a
* broken linked list implementation) */
callbackhandler.Allocate(&DOS_default_handler,"DOS default int");
real_writeb(0x70,4,(Bit8u)0xFE); //GRP 4
real_writeb(0x70,5,(Bit8u)0x38); //Extra Callback instruction
real_writew(0x70,6,callbackhandler.Get_callback()); //The immediate word
real_writeb(0x70,8,(Bit8u)0xCF); //An IRET Instruction
real_writed(0,0x01*4,0x700004);
real_writed(0,0x02*4,0x700004); //BioMenace (segment<0x8000)
real_writed(0,0x03*4,0x700004); //Alien Incident (offset!=0)
real_writed(0,0x04*4,0x700004); //Shadow President (lower byte of segment!=0)
// real_writed(0,0x0f*4,0x700004); //Always a tricky one (soundblaster irq)
// Create a dummy device MCB with PSPSeg=0x0008
DOS_MCB mcb_devicedummy((Bit16u)DOS_MEM_START);
mcb_devicedummy.SetPSPSeg(MCB_DOS); // Devices
mcb_devicedummy.SetSize(1);
mcb_devicedummy.SetType(0x4d); // More blocks will follow
// mcb_devicedummy.SetFileName("SD ");
Bit16u mcb_sizes=2;
// Create a small empty MCB (result from a growing environment block)
DOS_MCB tempmcb((Bit16u)DOS_MEM_START+mcb_sizes);
tempmcb.SetPSPSeg(MCB_FREE);
tempmcb.SetSize(4);
mcb_sizes+=5;
tempmcb.SetType(0x4d);
// Lock the previous empty MCB
DOS_MCB tempmcb2((Bit16u)DOS_MEM_START+mcb_sizes);
tempmcb2.SetPSPSeg(0x40); // can be removed by loadfix
tempmcb2.SetSize(16);
mcb_sizes+=17;
tempmcb2.SetType(0x4d);
DOS_MCB mcb((Bit16u)DOS_MEM_START+mcb_sizes);
mcb.SetPSPSeg(MCB_FREE); //Free
mcb.SetType(0x5a); //Last Block
if (machine==MCH_TANDY) {
/* memory up to 608k available, the rest (to 640k) is used by
the tandy graphics system's variable mapping of 0xb800 */
mcb.SetSize(0x97FE - DOS_MEM_START - mcb_sizes);
} else if (machine==MCH_PCJR) {
/* memory from 128k to 640k is available */
mcb_devicedummy.SetPt((Bit16u)0x2000);
mcb_devicedummy.SetPSPSeg(MCB_FREE);
mcb_devicedummy.SetSize(0x9FFE - 0x2000);
mcb_devicedummy.SetType(0x5a);
/* exclude PCJr graphics region */
mcb_devicedummy.SetPt((Bit16u)0x17ff);
mcb_devicedummy.SetPSPSeg(MCB_DOS);
mcb_devicedummy.SetSize(0x800);
mcb_devicedummy.SetType(0x4d);
/* memory below 96k */
mcb.SetSize(0x1800 - DOS_MEM_START - (2+mcb_sizes));
mcb.SetType(0x4d);
} else {
/* complete memory up to 640k available */
mcb.SetSize(0x9FFE - DOS_MEM_START - mcb_sizes);
}
dos.firstMCB=DOS_MEM_START;
dos_infoblock.SetFirstMCB(DOS_MEM_START);
}
void DOS_SetupTables(void) {
dos_memseg=0xd000;
Bit16u seg,seg2;Bitu i;
dos.tables.mediaid=RealMake(DOS_GetMemory(4),0);
dos.tables.tempdta=RealMake(DOS_GetMemory(4),0);
dos.tables.tempdta_fcbdelete=RealMake(DOS_GetMemory(4),0);
for (i=0;i<DOS_DRIVES;i++) mem_writew(Real2Phys(dos.tables.mediaid)+i*2,0);
/* Create the DOS Info Block */
dos_infoblock.SetLocation(DOS_INFOBLOCK_SEG); //c2woody
/* create SDA */
DOS_SDA(DOS_SDA_SEG,0).Init();
/* Some weird files >20 detection routine */
/* Possibly obselete when SFT is properly handled */
real_writed(DOS_CONSTRING_SEG,0x0a,0x204e4f43);
real_writed(DOS_CONSTRING_SEG,0x1a,0x204e4f43);
real_writed(DOS_CONSTRING_SEG,0x2a,0x204e4f43);
/* create a CON device driver */
seg=DOS_CONDRV_SEG;
real_writed(seg,0x00,0xffffffff); // next ptr
real_writew(seg,0x04,0x8013); // attributes
real_writed(seg,0x06,0xffffffff); // strategy routine
real_writed(seg,0x0a,0x204e4f43); // driver name
real_writed(seg,0x0e,0x20202020); // driver name
dos_infoblock.SetDeviceChainStart(RealMake(seg,0));
/* Create a fake Current Directory Structure */
seg=DOS_CDS_SEG;
real_writed(seg,0x00,0x005c3a43);
dos_infoblock.SetCurDirStruct(RealMake(seg,0));
/* Allocate DCBS DOUBLE BYTE CHARACTER SET LEAD-BYTE TABLE */
dos.tables.dcbs=RealMake(DOS_GetMemory(12),0);
mem_writed(Real2Phys(dos.tables.dcbs),0); //empty table
/* Create a fake FCB SFT */
seg=DOS_GetMemory(4);
real_writed(seg,0,0xffffffff); //Last File Table
real_writew(seg,4,100); //File Table supports 100 files
dos_infoblock.SetFCBTable(RealMake(seg,0));
/* Create a fake disk buffer head */
seg=DOS_GetMemory(6);
for (Bitu ct=0; ct<0x20; ct++) real_writeb(seg,ct,0);
real_writew(seg,0x00,0xffff); // forward ptr
real_writew(seg,0x02,0xffff); // backward ptr
real_writeb(seg,0x04,0xff); // not in use
real_writeb(seg,0x0a,0x01); // number of FATs
real_writed(seg,0x0d,0xffffffff); // pointer to DPB
dos_infoblock.SetDiskBufferHeadPt(RealMake(seg,0));
/* Set buffers to a nice value */
dos_infoblock.SetBuffers(50,50);
/* case map routine INT 0x21 0x38 */
call_casemap = CALLBACK_Allocate();
CALLBACK_Setup(call_casemap,DOS_CaseMapFunc,CB_RETF,"DOS CaseMap");
/* Add it to country structure */
host_writed(country_info + 0x12, CALLBACK_RealPointer(call_casemap));
dos.tables.country=country_info;
}
void DOS_InfoBlock::SetLocation(Bit16u segment) {
seg = segment;
pt=PhysMake(seg,0);
/* Clear the initial Block */
for(Bitu i=0;i<sizeof(sDIB);i++) mem_writeb(pt+i,0xff);
for(Bitu i=0;i<14;i++) mem_writeb(pt+i,0);
sSave(sDIB,regCXfrom5e,(Bit16u)0);
sSave(sDIB,countLRUcache,(Bit16u)0);
sSave(sDIB,countLRUopens,(Bit16u)0);
sSave(sDIB,protFCBs,(Bit16u)0);
sSave(sDIB,specialCodeSeg,(Bit16u)0);
sSave(sDIB,joindedDrives,(Bit8u)0);
sSave(sDIB,lastdrive,(Bit8u)0x01);//increase this if you add drives to cds-chain
sSave(sDIB,diskInfoBuffer,RealMake(segment,offsetof(sDIB,diskBufferHeadPt)));
sSave(sDIB,setverPtr,(Bit32u)0);
sSave(sDIB,a20FixOfs,(Bit16u)0);
sSave(sDIB,pspLastIfHMA,(Bit16u)0);
sSave(sDIB,blockDevices,(Bit8u)0);
sSave(sDIB,bootDrive,(Bit8u)0);
sSave(sDIB,useDwordMov,(Bit8u)1);
sSave(sDIB,extendedSize,(Bit16u)(MEM_TotalPages()*4-1024));
sSave(sDIB,magicWord,(Bit16u)0x0001); // dos5+
sSave(sDIB,sharingCount,(Bit16u)0);
sSave(sDIB,sharingDelay,(Bit16u)0);
sSave(sDIB,ptrCONinput,(Bit16u)0); // no unread input available
sSave(sDIB,maxSectorLength,(Bit16u)0x200);
sSave(sDIB,dirtyDiskBuffers,(Bit16u)0);
sSave(sDIB,lookaheadBufPt,(Bit32u)0);
sSave(sDIB,lookaheadBufNumber,(Bit16u)0);
sSave(sDIB,bufferLocation,(Bit8u)0); // buffer in base memory, no workspace
sSave(sDIB,workspaceBuffer,(Bit32u)0);
sSave(sDIB,minMemForExec,(Bit16u)0);
sSave(sDIB,memAllocScanStart,(Bit16u)DOS_MEM_START);
sSave(sDIB,startOfUMBChain,(Bit16u)0xffff);
sSave(sDIB,chainingUMB,(Bit8u)0);
sSave(sDIB,nulNextDriver,(Bit32u)0xffffffff);
sSave(sDIB,nulAttributes,(Bit16u)0x8004);
sSave(sDIB,nulStrategy,(Bit32u)0x00000000);
sSave(sDIB,nulString[0],(Bit8u)0x4e);
sSave(sDIB,nulString[1],(Bit8u)0x55);
sSave(sDIB,nulString[2],(Bit8u)0x4c);
sSave(sDIB,nulString[3],(Bit8u)0x20);
sSave(sDIB,nulString[4],(Bit8u)0x20);
sSave(sDIB,nulString[5],(Bit8u)0x20);
sSave(sDIB,nulString[6],(Bit8u)0x20);
sSave(sDIB,nulString[7],(Bit8u)0x20);
/* Create a fake SFT, so programs think there are 100 file handles */
Bit16u sftOffset=offsetof(sDIB,firstFileTable)+0xa2;
sSave(sDIB,firstFileTable,RealMake(segment,sftOffset));
real_writed(segment,sftOffset+0x00,RealMake(segment+0x26,0)); //Next File Table
real_writew(segment,sftOffset+0x04,100); //File Table supports 100 files
real_writed(segment+0x26,0x00,0xffffffff); //Last File Table
real_writew(segment+0x26,0x04,100); //File Table supports 100 files
}
void DOS_SetupTables(void) {
Bit16u seg;Bitu i;
dos.tables.mediaid=RealMake(DOS_GetMemory(4),0);
dos.tables.tempdta=RealMake(DOS_GetMemory(4),0);
dos.tables.tempdta_fcbdelete=RealMake(DOS_GetMemory(4),0);
for (i=0;i<DOS_DRIVES;i++) mem_writew(Real2Phys(dos.tables.mediaid)+i*2,0);
/* Create the DOS Info Block */
dos_infoblock.SetLocation(DOS_INFOBLOCK_SEG); //c2woody
/* create SDA */
DOS_SDA(DOS_SDA_SEG,0).Init();
/* Some weird files >20 detection routine */
/* Possibly obselete when SFT is properly handled */
real_writed(DOS_CONSTRING_SEG,0x0a,0x204e4f43);
real_writed(DOS_CONSTRING_SEG,0x1a,0x204e4f43);
real_writed(DOS_CONSTRING_SEG,0x2a,0x204e4f43);
/* create a CON device driver */
seg=DOS_CONDRV_SEG;
real_writed(seg,0x00,0xffffffff); // next ptr
real_writew(seg,0x04,0x8013); // attributes
real_writed(seg,0x06,0xffffffff); // strategy routine
real_writed(seg,0x0a,0x204e4f43); // driver name
real_writed(seg,0x0e,0x20202020); // driver name
dos_infoblock.SetDeviceChainStart(RealMake(seg,0));
/* Create a fake Current Directory Structure */
seg=DOS_CDS_SEG;
real_writed(seg,0x00,0x005c3a43);
dos_infoblock.SetCurDirStruct(RealMake(seg,0));
/* Allocate DCBS DOUBLE BYTE CHARACTER SET LEAD-BYTE TABLE */
dos.tables.dbcs=RealMake(DOS_GetMemory(12),0);
mem_writed(Real2Phys(dos.tables.dbcs),0); //empty table
/* FILENAME CHARACTER TABLE */
dos.tables.filenamechar=RealMake(DOS_GetMemory(2),0);
mem_writew(Real2Phys(dos.tables.filenamechar)+0x00,0x16);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x02,0x01);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x03,0x00); // allowed chars from
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x04,0xff); // ...to
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x05,0x00);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x06,0x00); // excluded chars from
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x07,0x20); // ...to
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x08,0x02);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x09,0x0e); // number of illegal separators
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0a,0x2e);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0b,0x22);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0c,0x2f);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0d,0x5c);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0e,0x5b);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x0f,0x5d);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x10,0x3a);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x11,0x7c);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x12,0x3c);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x13,0x3e);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x14,0x2b);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x15,0x3d);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x16,0x3b);
mem_writeb(Real2Phys(dos.tables.filenamechar)+0x17,0x2c);
/* COLLATING SEQUENCE TABLE + UPCASE TABLE*/
// 256 bytes for col table, 128 for upcase, 4 for number of entries
dos.tables.collatingseq=RealMake(DOS_GetMemory(25),0);
mem_writew(Real2Phys(dos.tables.collatingseq),0x100);
for (i=0; i<256; i++) mem_writeb(Real2Phys(dos.tables.collatingseq)+i+2,i);
dos.tables.upcase=dos.tables.collatingseq+258;
mem_writew(Real2Phys(dos.tables.upcase),0x80);
for (i=0; i<128; i++) mem_writeb(Real2Phys(dos.tables.upcase)+i+2,0x80+i);
/* Create a fake FCB SFT */
seg=DOS_GetMemory(4);
real_writed(seg,0,0xffffffff); //Last File Table
real_writew(seg,4,100); //File Table supports 100 files
dos_infoblock.SetFCBTable(RealMake(seg,0));
/* Create a fake DPB */
dos.tables.dpb=DOS_GetMemory(2);
for(Bitu d=0;d<26;d++) real_writeb(dos.tables.dpb,d,d);
/* Create a fake disk buffer head */
seg=DOS_GetMemory(6);
for (Bitu ct=0; ct<0x20; ct++) real_writeb(seg,ct,0);
real_writew(seg,0x00,0xffff); // forward ptr
real_writew(seg,0x02,0xffff); // backward ptr
real_writeb(seg,0x04,0xff); // not in use
real_writeb(seg,0x0a,0x01); // number of FATs
real_writed(seg,0x0d,0xffffffff); // pointer to DPB
dos_infoblock.SetDiskBufferHeadPt(RealMake(seg,0));
/* Set buffers to a nice value */
dos_infoblock.SetBuffers(50,50);
/* case map routine INT 0x21 0x38 */
call_casemap = CALLBACK_Allocate();
CALLBACK_Setup(call_casemap,DOS_CaseMapFunc,CB_RETF,"DOS CaseMap");
/* Add it to country structure */
host_writed(country_info + 0x12, CALLBACK_RealPointer(call_casemap));
dos.tables.country=country_info;
}
bool INT10_VideoState_Save(Bitu state,RealPt buffer) {
Bitu ct;
if ((state&7)==0) return false;
Bitu base_seg=RealSeg(buffer);
Bitu base_dest=RealOff(buffer)+0x20;
if (state&1) {
real_writew(base_seg,RealOff(buffer),base_dest);
Bit16u crt_reg=real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
real_writew(base_seg,base_dest+0x40,crt_reg);
real_writeb(base_seg,base_dest+0x00,IO_ReadB(0x3c4));
real_writeb(base_seg,base_dest+0x01,IO_ReadB(0x3d4));
real_writeb(base_seg,base_dest+0x02,IO_ReadB(0x3ce));
IO_ReadB(crt_reg+6);
real_writeb(base_seg,base_dest+0x03,IO_ReadB(0x3c0));
real_writeb(base_seg,base_dest+0x04,IO_ReadB(0x3ca));
// sequencer
for (ct=1; ct<5; ct++) {
IO_WriteB(0x3c4,ct);
real_writeb(base_seg,base_dest+0x04+ct,IO_ReadB(0x3c5));
}
real_writeb(base_seg,base_dest+0x09,IO_ReadB(0x3cc));
// crt controller
for (ct=0; ct<0x19; ct++) {
IO_WriteB(crt_reg,ct);
real_writeb(base_seg,base_dest+0x0a+ct,IO_ReadB(crt_reg+1));
}
// attr registers
for (ct=0; ct<4; ct++) {
IO_ReadB(crt_reg+6);
IO_WriteB(0x3c0,0x10+ct);
real_writeb(base_seg,base_dest+0x33+ct,IO_ReadB(0x3c1));
}
// graphics registers
for (ct=0; ct<9; ct++) {
IO_WriteB(0x3ce,ct);
real_writeb(base_seg,base_dest+0x37+ct,IO_ReadB(0x3cf));
}
// save some registers
IO_WriteB(0x3c4,2);
Bit8u crtc_2=IO_ReadB(0x3c5);
IO_WriteB(0x3c4,4);
Bit8u crtc_4=IO_ReadB(0x3c5);
IO_WriteB(0x3ce,6);
Bit8u gfx_6=IO_ReadB(0x3cf);
IO_WriteB(0x3ce,5);
Bit8u gfx_5=IO_ReadB(0x3cf);
IO_WriteB(0x3ce,4);
Bit8u gfx_4=IO_ReadB(0x3cf);
// reprogram for full access to plane latches
IO_WriteW(0x3c4,0x0f02);
IO_WriteW(0x3c4,0x0704);
IO_WriteW(0x3ce,0x0406);
IO_WriteW(0x3ce,0x0105);
mem_writeb(0xaffff,0);
for (ct=0; ct<4; ct++) {
IO_WriteW(0x3ce,0x0004+ct*0x100);
real_writeb(base_seg,base_dest+0x42+ct,mem_readb(0xaffff));
}
// restore registers
IO_WriteW(0x3ce,0x0004|(gfx_4<<8));
IO_WriteW(0x3ce,0x0005|(gfx_5<<8));
IO_WriteW(0x3ce,0x0006|(gfx_6<<8));
IO_WriteW(0x3c4,0x0004|(crtc_4<<8));
IO_WriteW(0x3c4,0x0002|(crtc_2<<8));
for (ct=0; ct<0x10; ct++) {
IO_ReadB(crt_reg+6);
IO_WriteB(0x3c0,ct);
real_writeb(base_seg,base_dest+0x23+ct,IO_ReadB(0x3c1));
}
IO_WriteB(0x3c0,0x20);
base_dest+=0x46;
}
if (state&2) {
real_writew(base_seg,RealOff(buffer)+2,base_dest);
real_writeb(base_seg,base_dest+0x00,mem_readb(0x410)&0x30);
for (ct=0; ct<0x1e; ct++) {
real_writeb(base_seg,base_dest+0x01+ct,mem_readb(0x449+ct));
}
for (ct=0; ct<0x07; ct++) {
real_writeb(base_seg,base_dest+0x1f+ct,mem_readb(0x484+ct));
}
real_writed(base_seg,base_dest+0x26,mem_readd(0x48a));
real_writed(base_seg,base_dest+0x2a,mem_readd(0x14)); // int 5
real_writed(base_seg,base_dest+0x2e,mem_readd(0x74)); // int 1d
real_writed(base_seg,base_dest+0x32,mem_readd(0x7c)); // int 1f
real_writed(base_seg,base_dest+0x36,mem_readd(0x10c)); // int 43
base_dest+=0x3a;
}
if (state&4) {
real_writew(base_seg,RealOff(buffer)+4,base_dest);
Bit16u crt_reg=real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
IO_ReadB(crt_reg+6);
IO_WriteB(0x3c0,0x14);
real_writeb(base_seg,base_dest+0x303,IO_ReadB(0x3c1));
Bitu dac_state=IO_ReadB(0x3c7)&1;
Bitu dac_windex=IO_ReadB(0x3c8);
if (dac_state!=0) dac_windex--;
real_writeb(base_seg,base_dest+0x000,dac_state);
real_writeb(base_seg,base_dest+0x001,dac_windex);
real_writeb(base_seg,base_dest+0x002,IO_ReadB(0x3c6));
for (ct=0; ct<0x100; ct++) {
IO_WriteB(0x3c7,ct);
real_writeb(base_seg,base_dest+0x003+ct*3+0,IO_ReadB(0x3c9));
real_writeb(base_seg,base_dest+0x003+ct*3+1,IO_ReadB(0x3c9));
real_writeb(base_seg,base_dest+0x003+ct*3+2,IO_ReadB(0x3c9));
}
IO_ReadB(crt_reg+6);
IO_WriteB(0x3c0,0x20);
base_dest+=0x303;
}
if ((svgaCard==SVGA_S3Trio) && (state&8)) {
real_writew(base_seg,RealOff(buffer)+6,base_dest);
Bit16u crt_reg=real_readw(BIOSMEM_SEG,BIOSMEM_CRTC_ADDRESS);
IO_WriteB(0x3c4,0x08);
// Bitu seq_8=IO_ReadB(0x3c5);
IO_ReadB(0x3c5);
// real_writeb(base_seg,base_dest+0x00,IO_ReadB(0x3c5));
IO_WriteB(0x3c5,0x06); // unlock s3-specific registers
// sequencer
for (ct=0; ct<0x13; ct++) {
IO_WriteB(0x3c4,0x09+ct);
real_writeb(base_seg,base_dest+0x00+ct,IO_ReadB(0x3c5));
}
// unlock s3-specific registers
IO_WriteW(crt_reg,0x4838);
IO_WriteW(crt_reg,0xa539);
// crt controller
Bitu ct_dest=0x13;
for (ct=0; ct<0x40; ct++) {
if ((ct==0x4a-0x30) || (ct==0x4b-0x30)) {
IO_WriteB(crt_reg,0x45);
IO_ReadB(crt_reg+1);
IO_WriteB(crt_reg,0x30+ct);
real_writeb(base_seg,base_dest+(ct_dest++),IO_ReadB(crt_reg+1));
real_writeb(base_seg,base_dest+(ct_dest++),IO_ReadB(crt_reg+1));
real_writeb(base_seg,base_dest+(ct_dest++),IO_ReadB(crt_reg+1));
} else {
IO_WriteB(crt_reg,0x30+ct);
real_writeb(base_seg,base_dest+(ct_dest++),IO_ReadB(crt_reg+1));
}
}
}
return true;
}
