mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
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f2a7b4cb8a
--------------- * added support for CUE files * added CD-DA tracks emulation (needs CUE+BIN or ISO+WAV images) * added CD fader emulation * added CDD "Fast FW" & "Fast RW" commands emulation * improved CDD TOC emulation (random freezes in Sonic CD, Switch/Panic, Final Fight CD and probably many others) * improved PCM chip synchronization with SUB-CPU (missing speeches in Willy Beamish) * fixed PCM chip emulation (random hangs in Snatcher, missing sound effects in Switch/Panic, Final Fight CD, Wonderdog...) * fixed Word-RAM memory mode on soft-reset (missing logo gfx effects) * fixed SUB-CPU access to unused areas when using PC-relative instructions (Final Fight CD first boss random crash) * fixed CPU idle loop detection on memory mode register access (Pugsy CD first boss slowdown) * fixed Mode 1 emulation (cartridge boot mode) [Core/Sound] --------------- * replaced FIR resampler by Blip Buffer for FM resampling * modified SN76489 core for use of Blip Buffer * improved PSG & FM chips synchronization using Blip Buffer * added Game Gear PSG stereo support * fixed SG-1000 specific PSG noise * fixed YM2612 LFO AM waveform (California Games surfing event) * fixed YM2612 phase precision * minor optimizations to YM2612 core [Core/Game Gear] --------------- * added support for CJ Elephant Fugitive (recently released by SMS Power) * added Game Gear extended screen option [Core/Genesis] --------------- * added support for a few recently dumped (but unreleased) games [Core/General] --------------- * improved ROM & CD image file loading * various code cleanup [Gamecube/Wii] --------------- * added automatic disc swap feature * removed automatic frameskipping (no use) * improved general audio/video sync * various code cleanup & bugfixes
105 lines
4.1 KiB
C
105 lines
4.1 KiB
C
/***************************************************************************************
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* Genesis Plus
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* Video Display Processor (68k & Z80 CPU interface)
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*
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* Support for SG-1000, Master System (315-5124 & 315-5246), Game Gear & Mega Drive VDP
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*
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* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
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* Copyright (C) 2007-2012 Eke-Eke (Genesis Plus GX)
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*
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* Redistribution and use of this code or any derivative works are permitted
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* provided that the following conditions are met:
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*
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* - Redistributions may not be sold, nor may they be used in a commercial
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* product or activity.
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*
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* - Redistributions that are modified from the original source must include the
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* complete source code, including the source code for all components used by a
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* binary built from the modified sources. However, as a special exception, the
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* source code distributed need not include anything that is normally distributed
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* (in either source or binary form) with the major components (compiler, kernel,
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* and so on) of the operating system on which the executable runs, unless that
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* component itself accompanies the executable.
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*
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* - Redistributions must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other
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* materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************************/
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#ifndef _VDP_H_
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#define _VDP_H_
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/* VDP context */
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extern uint8 reg[0x20];
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extern uint8 sat[0x400];
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extern uint8 vram[0x10000];
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extern uint8 cram[0x80];
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extern uint8 vsram[0x80];
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extern uint8 hint_pending;
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extern uint8 vint_pending;
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extern uint16 status;
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extern uint32 dma_length;
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/* Global variables */
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extern uint16 ntab;
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extern uint16 ntbb;
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extern uint16 ntwb;
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extern uint16 satb;
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extern uint16 hscb;
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extern uint8 bg_name_dirty[0x800];
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extern uint16 bg_name_list[0x800];
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extern uint16 bg_list_index;
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extern uint8 hscroll_mask;
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extern uint8 playfield_shift;
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extern uint8 playfield_col_mask;
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extern uint16 playfield_row_mask;
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extern uint8 odd_frame;
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extern uint8 im2_flag;
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extern uint8 interlaced;
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extern uint8 vdp_pal;
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extern uint16 v_counter;
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extern uint16 vc_max;
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extern uint16 vscroll;
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extern uint16 lines_per_frame;
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extern int32 fifo_write_cnt;
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extern uint32 fifo_lastwrite;
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extern uint32 hvc_latch;
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extern const uint8 *hctab;
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/* Function pointers */
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extern void (*vdp_68k_data_w)(unsigned int data);
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extern void (*vdp_z80_data_w)(unsigned int data);
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extern unsigned int (*vdp_68k_data_r)(void);
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extern unsigned int (*vdp_z80_data_r)(void);
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/* Function prototypes */
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extern void vdp_init(void);
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extern void vdp_reset(void);
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extern int vdp_context_save(uint8 *state);
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extern int vdp_context_load(uint8 *state);
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extern void vdp_dma_update(unsigned int cycles);
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extern void vdp_68k_ctrl_w(unsigned int data);
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extern void vdp_z80_ctrl_w(unsigned int data);
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extern void vdp_sms_ctrl_w(unsigned int data);
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extern void vdp_tms_ctrl_w(unsigned int data);
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extern unsigned int vdp_68k_ctrl_r(unsigned int cycles);
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extern unsigned int vdp_z80_ctrl_r(unsigned int cycles);
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extern unsigned int vdp_hvc_r(unsigned int cycles);
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extern void vdp_test_w(unsigned int data);
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extern int vdp_68k_irq_ack(int int_level);
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#endif /* _VDP_H_ */
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