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Make the internal program for loading ROM images a bit smarter about what it can/will load. Also provide for BASIC in ROM to support IBM BASIC interpreters.

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Imported-from: https://svn.code.sf.net/p/dosbox/code-0/dosbox/trunk@3984
This commit is contained in:
ripsaw8080 2016-05-23 11:37:39 +00:00
parent 64a04b9985
commit 8fc782f561
1 changed files with 54 additions and 28 deletions
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82
src/dos/dos_programs.cpp
View file

@ -871,60 +871,81 @@ static void BOOT_ProgramStart(Program * * make) {
}
#if C_DEBUG
class LDGFXROM : public Program {
class LOADROM : public Program {
public:
void Run(void) {
if (!(cmd->FindCommand(1, temp_line))) return;
if (!(cmd->FindCommand(1, temp_line))) {
WriteOut(MSG_Get("PROGRAM_LOADROM_SPECIFY_FILE"));
return;
}
Bit8u drive;
char fullname[DOS_PATHLENGTH];
localDrive* ldp=0;
if (!DOS_MakeName((char *)temp_line.c_str(),fullname,&drive)) return;
try {
try {
/* try to read ROM file into buffer */
ldp=dynamic_cast<localDrive*>(Drives[drive]);
if(!ldp) return;
FILE *tmpfile = ldp->GetSystemFilePtr(fullname, "rb");
if(tmpfile == NULL) {
LOG_MSG("BIOS file not accessible.");
WriteOut(MSG_Get("PROGRAM_LOADROM_CANT_OPEN"));
return;
}
fseek(tmpfile, 0L, SEEK_END);
if (ftell(tmpfile)>0x10000) {
LOG_MSG("BIOS file too large.");
if (ftell(tmpfile)>0x8000) {
WriteOut(MSG_Get("PROGRAM_LOADROM_TOO_LARGE"));
fclose(tmpfile);
return;
}
fseek(tmpfile, 0L, SEEK_SET);
PhysPt rom_base=PhysMake(0xc000,0);
Bit8u vga_buffer[0x10000];
Bitu data_written=0;
Bitu data_read=fread(vga_buffer, 1, 0x10000, tmpfile);
for (Bitu ct=0; ct<data_read; ct++) {
phys_writeb(rom_base+(data_written++),vga_buffer[ct]);
}
Bit8u rom_buffer[0x8000];
Bitu data_read = fread(rom_buffer, 1, 0x8000, tmpfile);
fclose(tmpfile);
rom_base=PhysMake(0xf000,0);
phys_writeb(rom_base+0xf065,0xcf);
/* try to identify ROM type */
PhysPt rom_base = 0;
if (data_read >= 0x4000 && rom_buffer[0] == 0x55 && rom_buffer[1] == 0xaa &&
rom_buffer[3] == 0xeb && strncmp((char*)(&rom_buffer[0x1e]), "IBM", 3) == 0) {
if (!IS_EGAVGA_ARCH) {
WriteOut(MSG_Get("PROGRAM_LOADROM_INCOMPATIBLE"));
return;
}
rom_base = PhysMake(0xc000, 0); // video BIOS
}
else if (data_read == 0x8000 && rom_buffer[0] == 0xe9 && rom_buffer[1] == 0x8f &&
rom_buffer[2] == 0x7e && strncmp((char*)(&rom_buffer[0x4cd4]), "IBM", 3) == 0) {
rom_base = PhysMake(0xf600, 0); // BASIC
}
if (rom_base) {
/* write buffer into ROM */
for (Bitu i=0; i<data_read; i++) phys_writeb(rom_base + i, rom_buffer[i]);
if (rom_base == 0xc0000) {
/* initialize video BIOS */
phys_writeb(PhysMake(0xf000, 0xf065), 0xcf);
reg_flags &= ~FLAG_IF;
CALLBACK_RunRealFar(0xc000, 0x0003);
LOG_MSG("Video BIOS ROM loaded and initialized.");
}
else WriteOut(MSG_Get("PROGRAM_LOADROM_BASIC_LOADED"));
}
else WriteOut(MSG_Get("PROGRAM_LOADROM_UNRECOGNIZED"));
}
catch(...) {
return;
}
reg_flags&=~FLAG_IF;
CALLBACK_RunRealFar(0xc000,0x0003);
}
};
static void LDGFXROM_ProgramStart(Program * * make) {
*make=new LDGFXROM;
static void LOADROM_ProgramStart(Program * * make) {
*make=new LOADROM;
}
#endif
// LOADFIX
@ -1649,6 +1670,13 @@ void DOS_SetupPrograms(void) {
MSG_Add("PROGRAM_BOOT_CART_LIST_CMDS","Available PCjr cartridge commandos:%s");
MSG_Add("PROGRAM_BOOT_CART_NO_CMDS","No PCjr cartridge commandos found");
MSG_Add("PROGRAM_LOADROM_SPECIFY_FILE","Must specify ROM file to load.\n");
MSG_Add("PROGRAM_LOADROM_CANT_OPEN","ROM file not accessible.\n");
MSG_Add("PROGRAM_LOADROM_TOO_LARGE","ROM file too large.\n");
MSG_Add("PROGRAM_LOADROM_INCOMPATIBLE","Video BIOS not supported by machine type.\n");
MSG_Add("PROGRAM_LOADROM_UNRECOGNIZED","ROM file not recognized.\n");
MSG_Add("PROGRAM_LOADROM_BASIC_LOADED","BASIC ROM loaded.\n");
MSG_Add("PROGRAM_IMGMOUNT_SPECIFY_DRIVE","Must specify drive letter to mount image at.\n");
MSG_Add("PROGRAM_IMGMOUNT_SPECIFY2","Must specify drive number (0 or 3) to mount image at (0,1=fda,fdb;2,3=hda,hdb).\n");
MSG_Add("PROGRAM_IMGMOUNT_SPECIFY_GEOMETRY",
@ -1694,9 +1722,7 @@ void DOS_SetupPrograms(void) {
PROGRAMS_MakeFile("RESCAN.COM",RESCAN_ProgramStart);
PROGRAMS_MakeFile("INTRO.COM",INTRO_ProgramStart);
PROGRAMS_MakeFile("BOOT.COM",BOOT_ProgramStart);
#if C_DEBUG
PROGRAMS_MakeFile("LDGFXROM.COM", LDGFXROM_ProgramStart);
#endif
PROGRAMS_MakeFile("LOADROM.COM", LOADROM_ProgramStart);
PROGRAMS_MakeFile("IMGMOUNT.COM", IMGMOUNT_ProgramStart);
PROGRAMS_MakeFile("KEYB.COM", KEYB_ProgramStart);
}