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/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* Copyright (C) 2002-2021 The DOSBox Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "program_loadrom.h"
#include "dosbox.h"
#include <stdio.h>
#include "drives.h"
#include "callback.h"
#include "regs.h"
void LOADROM::Run(void) {
if (!(cmd->FindCommand(1, temp_line))) {
WriteOut(MSG_Get("PROGRAM_LOADROM_SPECIFY_FILE"));
return;
}
if (HelpRequested()) {
WriteOut(MSG_Get("PROGRAM_LOADROM_HELP_LONG"));
return;
}
uint8_t drive;
char fullname[DOS_PATHLENGTH];
localDrive* ldp=0;
if (!DOS_MakeName((char *)temp_line.c_str(),fullname,&drive)) return;
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) {
WriteOut(MSG_Get("PROGRAM_LOADROM_CANT_OPEN"));
return;
}
fseek(tmpfile, 0L, SEEK_END);
if (ftell(tmpfile)>0x8000) {
WriteOut(MSG_Get("PROGRAM_LOADROM_TOO_LARGE"));
fclose(tmpfile);
return;
}
fseek(tmpfile, 0L, SEEK_SET);
uint8_t rom_buffer[0x8000];
Bitu data_read = fread(rom_buffer, 1, 0x8000, tmpfile);
fclose(tmpfile);
/* try to identify ROM type */
PhysPt rom_base = 0;
if (data_read >= 0x4000 && rom_buffer[0] == 0x55 && rom_buffer[1] == 0xaa &&
(rom_buffer[3] & 0xfc) == 0xe8 && 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;
}
}
void LOADROM::AddMessages() {
MSG_Add("PROGRAM_LOADROM_HELP_LONG",
"Loads a ROM image of the video BIOS or IBM BASIC.\n"
"\n"
"Usage:\n"
" [color=green]loadrom [color=cyan]IMAGEFILE[reset]\n"
"\n"
"Where:\n"
" [color=cyan]IMAGEFILE[reset] is a video BIOS or IBM BASIC ROM image.\n"
"\n"
"Notes:\n"
" After loading an IBM BASIC ROM image into the emulated ROM with the command,\n"
" you can run the original IBM BASIC interpreter program in DOSBox Staging.\n"
"\n"
"Examples:\n"
" [color=green]loadrom[reset] [color=cyan]bios.rom[reset]\n");
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");
}
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