/* Hey EMACS -*- linux-c -*- */ /* $Id: mem89tm.c 2268 2006-11-06 17:18:51Z roms $ */ /* TiEmu - Tiemu Is an EMUlator * * Copyright (c) 2000-2001, Thomas Corvazier, Romain Liévin * Copyright (c) 2001-2003, Romain Liévin * Copyright (c) 2003, Julien Blache * Copyright (c) 2004, Romain Liévin * Copyright (c) 2005, Romain Liévin, Kevin Kofler * Copyright (c) 2007, Kevin Kofler * * 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. */ /* Memory management: TI89 Titanium without any HW protection Some values may be hard-coded for performance reasons ! */ #include #include #include #include "mem.h" #include "mem89tm.h" #include "ti68k_def.h" #include "mem_size.h" #include "main.h" // 000000-03ffff : RAM (256 KB), not mirrored // 100000-1fffff : unused // 200000-2fffff : image of 0x000000 (ghost, not mirrored) // 300000-3fffff : unused // 400000-4fffff : image of 0x000000 (ghost, not mirrored) // 500000-5fffff : unused // 600000-6fffff : memory mapped I/O (all HW) // 700000-7fffff : memory mapped I/O (HW2, HW3), non ghost'ed // 800000-8fffff : ROM (TI89 Titanium) // 900000-9fffff : idem // a00000-afffff : idem // b00000-bfffff : idem // c00000-cfffff : unused // d00000-dfffff : ... // e00000-efffff : ... // d00000-ffffff : unused int ti89t_mem_init(void) { // set mappers mem_get_byte_ptr = ti89t_get_byte; mem_get_word_ptr = ti89t_get_word; mem_get_long_ptr = ti89t_get_long; mem_get_real_addr_ptr = ti89t_get_real_addr; return 0; } uint8_t* ti89t_get_real_addr(uint32_t adr) { // RAM access if(IN_BOUNDS(0x000000, adr, 0x03ffff) || IN_BOUNDS(0x200000, adr, 0x23ffff) || IN_BOUNDS(0x400000, adr, 0x43ffff)) { return get_p(ram, adr, 0x03ffff); } // FLASH access else if(IN_BOUNDS(0x800000, adr, 0xbfffff)) { return get_p(rom, adr, ROM_SIZE_TI89T - 1); } return unused; } uint32_t ti89t_get_long(uint32_t adr) { // RAM access if(IN_BOUNDS(0x000000, adr, 0x03ffff) || IN_BOUNDS(0x200000, adr, 0x23ffff) || IN_BOUNDS(0x400000, adr, 0x43ffff)) { return get_l(ram, adr, 0x03ffff); } // FLASH access else if(IN_BOUNDS(0x800000, adr, 0xbfffff)) { return get_l(rom, adr, ROM_SIZE_TI89T - 1); } return 0x14141414; } uint16_t ti89t_get_word(uint32_t adr) { // RAM access if(IN_BOUNDS(0x000000, adr, 0x03ffff) || IN_BOUNDS(0x200000, adr, 0x23ffff) || IN_BOUNDS(0x400000, adr, 0x43ffff)) { return get_w(ram, adr, 0x03ffff); } // FLASH access else if(IN_BOUNDS(0x800000, adr, 0xbfffff)) { return get_w(rom, adr, ROM_SIZE_TI89T - 1); } return 0x1414; } uint8_t ti89t_get_byte(uint32_t adr) { // RAM access if(IN_BOUNDS(0x000000, adr, 0x03ffff) || IN_BOUNDS(0x200000, adr, 0x23ffff) || IN_BOUNDS(0x400000, adr, 0x43ffff)) { return get_b(ram, adr, 0x03ffff); } // FLASH access else if(IN_BOUNDS(0x800000, adr, 0xbfffff)) { return get_b(rom, adr, ROM_SIZE_TI89T - 1); } return 0x14; }