mirror of
https://github.com/libretro/smsplus-gx.git
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169 lines
4.0 KiB
C
169 lines
4.0 KiB
C
/******************************************************************************
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* Sega Master System / GameGear Emulator
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* Copyright (C) 1998-2007 Charles MacDonald
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*
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* additionnal code by Eke-Eke (SMS Plus GX)
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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
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Sega Master System console emulation
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*
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******************************************************************************/
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#ifndef SMS_H_
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#define SMS_H_
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#define CYCLES_PER_LINE 228
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enum {
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SLOT_BIOS = 0,
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SLOT_CARD = 1,
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SLOT_CART = 2,
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SLOT_EXP = 3
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};
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enum {
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MAPPER_NONE = 0,
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MAPPER_SEGA = 1,
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MAPPER_CODIES = 2,
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MAPPER_KOREA = 3,
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MAPPER_KOREA_MSX = 4,
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MAPPER_4PAK = 5
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};
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enum {
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DISPLAY_NTSC = 0,
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DISPLAY_PAL = 1
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};
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enum {
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FPS_NTSC = 60,
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FPS_PAL = 50
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};
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enum {
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CLOCK_NTSC = 3579545,
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CLOCK_PAL = 3546895,
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CLOCK_NTSC_SMS1 = 3579527
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};
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enum {
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CONSOLE_COLECO = 0x10,
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CONSOLE_SG1000 = 0x11,
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CONSOLE_SC3000 = 0x12,
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CONSOLE_SF7000 = 0x13,
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CONSOLE_SORDM5 = 0x14,
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CONSOLE_SMS = 0x20,
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CONSOLE_SMS2 = 0x21,
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CONSOLE_GG = 0x40,
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CONSOLE_GGMS = 0x41,
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CONSOLE_MD = 0x80,
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CONSOLE_MDPBC = 0x81,
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CONSOLE_GEN = 0x82,
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CONSOLE_GENPBC = 0x83
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};
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#define HWTYPE_TMS CONSOLE_COLECO
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#define HWTYPE_SMS CONSOLE_SMS
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#define HWTYPE_GG CONSOLE_GG
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#define HWTYPE_MD CONSOLE_MD
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#define IS_TMS (sms.console & HWTYPE_TMS)
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#define IS_SMS (sms.console & HWTYPE_SMS)
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#define IS_GG (sms.console & HWTYPE_GG)
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#define IS_MD (sms.console & HWTYPE_MD)
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enum {
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TERRITORY_DOMESTIC = 0,
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TERRITORY_EXPORT = 1
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};
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/* SMS context */
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typedef struct
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{
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struct
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{
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uint8_t pdr; /* Parallel data register */
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uint8_t ddr; /* Data direction register */
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uint8_t txdata; /* Transmit data buffer */
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uint8_t rxdata; /* Receive data buffer */
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uint8_t sctrl; /* Serial mode control and status */
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} sio;
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uint8_t wram[0x2000];
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uint8_t paused;
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uint8_t save;
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uint8_t territory;
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uint8_t console;
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uint8_t display;
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uint8_t glasses_3d;
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uint8_t hlatch;
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uint8_t memctrl;
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uint8_t ioctrl;
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uint8_t irq;
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uint8_t gun_offset;
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uint32_t fm_detect;
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int32_t use_fm;
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uint8_t device[2];
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} sms_t;
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/* BIOS ROM */
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typedef struct
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{
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uint8_t *rom;
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uint8_t enabled;
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/* We need to use an unsigned short for pages, as Bad Apple SMS requires it !*/
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uint16_t pages;
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uint8_t fcr[4];
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} bios_t;
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typedef struct
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{
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uint8_t *rom;
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/* We need to use an unsigned short for pages, as Bad Apple SMS requires it !*/
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uint16_t pages;
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uint8_t *fcr;
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uint8_t mapper;
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} slot_t;
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typedef struct
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{
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uint8_t rom[0x2000]; /* BIOS ROM */
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uint8_t pio_mode; /* PIO mode */
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uint8_t keypad[2]; /* Keypad inputs */
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} t_coleco;
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/* Global data */
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extern sms_t sms;
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extern bios_t bios;
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extern slot_t slot;
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extern t_coleco coleco;
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extern uint8_t dummy_write[0x400];
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extern uint8_t dummy_read[0x400];
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/* Function prototypes */
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extern void sms_init(void);
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extern void sms_reset(void);
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extern void sms_shutdown(void);
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extern void mapper_reset(void);
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extern void mapper_8k_w(uint16_t address, uint8_t data);
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extern void mapper_16k_w(uint16_t address, uint8_t data);
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extern int32_t sms_irq_callback(int32_t param);
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#endif /* _SMS_H_ */
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