mirror of
https://github.com/retro100/dosbox-wii.git
synced 2024-09-28 17:58:36 +02:00
215 lines
6.9 KiB
C++
215 lines
6.9 KiB
C++
/*
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* Copyright (C) 2002-2019 The DOSBox Team
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "dosbox.h"
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#include "callback.h"
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#include "mem.h"
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#include "regs.h"
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#include "dos_inc.h"
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#include <list>
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static Bitu call_int2f,call_int2a;
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static std::list<MultiplexHandler*> Multiplex;
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typedef std::list<MultiplexHandler*>::iterator Multiplex_it;
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void DOS_AddMultiplexHandler(MultiplexHandler * handler) {
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Multiplex.push_front(handler);
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}
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void DOS_DelMultiplexHandler(MultiplexHandler * handler) {
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for(Multiplex_it it =Multiplex.begin();it != Multiplex.end();it++) {
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if(*it == handler) {
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Multiplex.erase(it);
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return;
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}
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}
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}
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static Bitu INT2F_Handler(void) {
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for(Multiplex_it it = Multiplex.begin();it != Multiplex.end();it++)
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if( (*it)() ) return CBRET_NONE;
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LOG(LOG_DOSMISC,LOG_ERROR)("DOS:Multiplex Unhandled call %4X",reg_ax);
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return CBRET_NONE;
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}
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static Bitu INT2A_Handler(void) {
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return CBRET_NONE;
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}
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static bool DOS_MultiplexFunctions(void) {
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switch (reg_ax) {
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case 0x1216: /* GET ADDRESS OF SYSTEM FILE TABLE ENTRY */
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// reg_bx is a system file table entry, should coincide with
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// the file handle so just use that
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LOG(LOG_DOSMISC,LOG_ERROR)("Some BAD filetable call used bx=%X",reg_bx);
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if(reg_bx <= DOS_FILES) CALLBACK_SCF(false);
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else CALLBACK_SCF(true);
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if (reg_bx<16) {
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RealPt sftrealpt=mem_readd(Real2Phys(dos_infoblock.GetPointer())+4);
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PhysPt sftptr=Real2Phys(sftrealpt);
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Bitu sftofs=0x06+reg_bx*0x3b;
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if (Files[reg_bx]) mem_writeb(sftptr+sftofs,Files[reg_bx]->refCtr);
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else mem_writeb(sftptr+sftofs,0);
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if (!Files[reg_bx]) return true;
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Bit32u handle=RealHandle(reg_bx);
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if (handle>=DOS_FILES) {
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mem_writew(sftptr+sftofs+0x02,0x02); // file open mode
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mem_writeb(sftptr+sftofs+0x04,0x00); // file attribute
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mem_writew(sftptr+sftofs+0x05,Files[reg_bx]->GetInformation()); // device info word
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mem_writed(sftptr+sftofs+0x07,0); // device driver header
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mem_writew(sftptr+sftofs+0x0d,0); // packed time
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mem_writew(sftptr+sftofs+0x0f,0); // packed date
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mem_writew(sftptr+sftofs+0x11,0); // size
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mem_writew(sftptr+sftofs+0x15,0); // current position
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} else {
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Bit8u drive=Files[reg_bx]->GetDrive();
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mem_writew(sftptr+sftofs+0x02,(Bit16u)(Files[reg_bx]->flags&3)); // file open mode
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mem_writeb(sftptr+sftofs+0x04,(Bit8u)(Files[reg_bx]->attr)); // file attribute
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mem_writew(sftptr+sftofs+0x05,0x40|drive); // device info word
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mem_writed(sftptr+sftofs+0x07,RealMake(dos.tables.dpb,drive*9)); // dpb of the drive
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mem_writew(sftptr+sftofs+0x0d,Files[reg_bx]->time); // packed file time
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mem_writew(sftptr+sftofs+0x0f,Files[reg_bx]->date); // packed file date
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Bit32u curpos=0;
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Files[reg_bx]->Seek(&curpos,DOS_SEEK_CUR);
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Bit32u endpos=0;
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Files[reg_bx]->Seek(&endpos,DOS_SEEK_END);
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mem_writed(sftptr+sftofs+0x11,endpos); // size
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mem_writed(sftptr+sftofs+0x15,curpos); // current position
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Files[reg_bx]->Seek(&curpos,DOS_SEEK_SET);
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}
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// fill in filename in fcb style
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// (space-padded name (8 chars)+space-padded extension (3 chars))
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const char* filename=(const char*)Files[reg_bx]->GetName();
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if (strrchr(filename,'\\')) filename=strrchr(filename,'\\')+1;
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if (strrchr(filename,'/')) filename=strrchr(filename,'/')+1;
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if (!filename) return true;
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const char* dotpos=strrchr(filename,'.');
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if (dotpos) {
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dotpos++;
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size_t nlen=strlen(filename);
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size_t extlen=strlen(dotpos);
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Bits nmelen=(Bits)nlen-(Bits)extlen;
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if (nmelen<1) return true;
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nlen-=(extlen+1);
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if (nlen>8) nlen=8;
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size_t i;
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for (i=0; i<nlen; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x20+i),filename[i]);
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for (i=nlen; i<8; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x20+i),' ');
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if (extlen>3) extlen=3;
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for (i=0; i<extlen; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x28+i),dotpos[i]);
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for (i=extlen; i<3; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x28+i),' ');
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} else {
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size_t i;
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size_t nlen=strlen(filename);
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if (nlen>8) nlen=8;
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for (i=0; i<nlen; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x20+i),filename[i]);
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for (i=nlen; i<11; i++)
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mem_writeb((PhysPt)(sftptr+sftofs+0x20+i),' ');
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}
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SegSet16(es,RealSeg(sftrealpt));
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reg_di=RealOff(sftrealpt+sftofs);
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reg_ax=0xc000;
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}
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return true;
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case 0x1607:
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if (reg_bx == 0x15) {
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switch (reg_cx) {
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case 0x0000: // query instance
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reg_cx = 0x0001;
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reg_dx = 0x50; // dos driver segment
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SegSet16(es,0x50); // patch table seg
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reg_bx = 0x60; // patch table ofs
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return true;
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case 0x0001: // set patches
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reg_ax = 0xb97c;
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reg_bx = (reg_dx & 0x16);
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reg_dx = 0xa2ab;
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return true;
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case 0x0003: // get size of data struc
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if (reg_dx==0x0001) {
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// CDS size requested
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reg_ax = 0xb97c;
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reg_dx = 0xa2ab;
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reg_cx = 0x000e; // size
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}
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return true;
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case 0x0004: // instanced data
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reg_dx = 0; // none
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return true;
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case 0x0005: // get device driver size
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reg_ax = 0;
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reg_dx = 0;
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return true;
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default:
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return false;
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}
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}
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else if (reg_bx == 0x18) return true; // idle callout
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else return false;
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case 0x1680: /* RELEASE CURRENT VIRTUAL MACHINE TIME-SLICE */
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//TODO Maybe do some idling but could screw up other systems :)
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return true; //So no warning in the debugger anymore
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case 0x1689: /* Kernel IDLE CALL */
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case 0x168f: /* Close awareness crap */
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/* Removing warning */
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return true;
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case 0x4a01: /* Query free hma space */
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case 0x4a02: /* ALLOCATE HMA SPACE */
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LOG(LOG_DOSMISC,LOG_WARN)("INT 2f:4a HMA. DOSBox reports none available.");
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reg_bx=0; //number of bytes available in HMA or amount successfully allocated
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//ESDI=ffff:ffff Location of HMA/Allocated memory
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SegSet16(es,0xffff);
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reg_di=0xffff;
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return true;
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}
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return false;
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}
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void DOS_SetupMisc(void) {
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/* Setup the dos multiplex interrupt */
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call_int2f=CALLBACK_Allocate();
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CALLBACK_Setup(call_int2f,&INT2F_Handler,CB_IRET,"DOS Int 2f");
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RealSetVec(0x2f,CALLBACK_RealPointer(call_int2f));
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DOS_AddMultiplexHandler(DOS_MultiplexFunctions);
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/* Setup the dos network interrupt */
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call_int2a=CALLBACK_Allocate();
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CALLBACK_Setup(call_int2a,&INT2A_Handler,CB_IRET,"DOS Int 2a");
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RealSetVec(0x2A,CALLBACK_RealPointer(call_int2a));
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}
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