83 lines
2.5 KiB
C++
83 lines
2.5 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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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 3 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include "common/endian.h"
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#include "glk/scott/types.h"
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#include "glk/scott/unp64/unp64.h"
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#include "glk/scott/unp64/exo_util.h"
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namespace Glk {
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namespace Scott {
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void scnMegabyte(UnpStr *unp) {
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byte *mem;
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int p;
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if (unp->_idFlag)
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return;
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mem = unp->_mem;
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if (unp->_depAdr == 0) {
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p = 0;
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if (mem[0x816] == 0x4c)
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p = READ_LE_UINT16(&mem[0x817]); // mem[0x817] | mem[0x818] << 8;
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else if (unp->_info->_run == 0x810 && mem[0x814] == 0x4c &&
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u32eqmasked(mem + 0x810, 0xffff00ff, 0x018500A9))
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p = READ_LE_UINT16(&mem[0x815]); // mem[0x815] | mem[0x816] << 8;
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if (p) {
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if (mem[p + 0] == 0x78 && mem[p + 1] == 0xa2 &&
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mem[p + 3] == 0xa0 &&
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u32eq(mem + p + 0x05, 0x15841486) &&
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u32eq(mem + p + 0x1d, 0x03804CF7)) {
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unp->_depAdr = 0x380;
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unp->_endAdr = READ_LE_UINT16(&mem[p + 0x55]); // mem[p + 0x55] | mem[p + 0x56] << 8;
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unp->_endAdr++;
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unp->_strMem = 0x801;
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unp->_retAdr = 0x801; /* usually it just runs */
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unp->_idFlag = 1;
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return;
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}
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}
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}
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if (unp->_depAdr == 0) {
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p = 0;
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if (mem[0x81a] == 0x4c &&
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u32eqmasked(mem + 0x816, 0xffff00ff, 0x018500A9))
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p = READ_LE_UINT16(&mem[0x81b]); // mem[0x81b] | mem[0x81c] << 8;
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if (p) {
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if (mem[p + 0] == 0x78 && mem[p + 1] == 0xa2 &&
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mem[p + 3] == 0xa0 &&
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u32eq(mem + p + 0x05, 0x15841486) &&
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u32eq(mem + p + 0x1d, 0x03844CF7)) {
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unp->_depAdr = 0x384;
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unp->_forced = 0x816;
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unp->_endAdr = READ_LE_UINT16(&mem[p + 0x59]); // mem[p + 0x59] | mem[p + 0x5a] << 8;
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unp->_endAdr++;
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unp->_strMem = 0x801;
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unp->_retAdr = 0x801; /* usually it just runs */
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unp->_idFlag = 1;
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return;
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}
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}
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}
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}
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} // End of namespace Scott
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} // End of namespace Glk
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