mirror of
https://github.com/ekeeke/Genesis-Plus-GX.git
synced 2024-12-28 12:11:50 +01:00
91 lines
2.9 KiB
C
91 lines
2.9 KiB
C
/***************************************************************************************
|
|
* Genesis Plus
|
|
* Video Display Processor (memory handlers)
|
|
*
|
|
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald (original code)
|
|
* Eke-Eke (2007,2008,2009), additional code & fixes for the GCN/Wii port
|
|
*
|
|
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*
|
|
****************************************************************************************/
|
|
|
|
#ifndef _VDP_H_
|
|
#define _VDP_H_
|
|
|
|
/* VDP context */
|
|
extern uint8 sat[0x400];
|
|
extern uint8 vram[0x10000];
|
|
extern uint8 cram[0x80];
|
|
extern uint8 vsram[0x80];
|
|
extern uint8 reg[0x20];
|
|
extern uint16 addr;
|
|
extern uint16 addr_latch;
|
|
extern uint8 code;
|
|
extern uint8 pending;
|
|
extern uint16 status;
|
|
extern uint8 dmafill;
|
|
extern uint8 hint_pending;
|
|
extern uint8 vint_pending;
|
|
extern uint8 irq_status;
|
|
|
|
/* Global variables */
|
|
extern uint16 ntab;
|
|
extern uint16 ntbb;
|
|
extern uint16 ntwb;
|
|
extern uint16 satb;
|
|
extern uint16 hscb;
|
|
|
|
extern uint8 bg_name_dirty[0x800];
|
|
extern uint16 bg_name_list[0x800];
|
|
extern uint16 bg_list_index;
|
|
extern uint8 bg_pattern_cache[0x80000];
|
|
extern uint8 playfield_shift;
|
|
extern uint8 playfield_col_mask;
|
|
extern uint16 playfield_row_mask;
|
|
extern uint16 v_counter;
|
|
extern uint32 hvc_latch;
|
|
extern uint32 dma_length;
|
|
extern int32 fifo_write_cnt;
|
|
extern uint32 fifo_lastwrite;
|
|
extern uint8 im2_flag;
|
|
extern uint8 interlaced;
|
|
extern uint8 odd_frame;
|
|
extern uint8 vdp_pal;
|
|
extern uint16 lines_per_frame;
|
|
|
|
extern const uint8 vc_ntsc_224[262];
|
|
extern const uint8 vc_pal_224[313];
|
|
extern const uint8 vc_pal_240[313];
|
|
extern const uint8 cycle2hc32[3420];
|
|
extern const uint8 cycle2hc40[3420];
|
|
extern const uint8 *vctab;
|
|
extern const uint8 *hctab;
|
|
|
|
/* Function prototypes */
|
|
extern void vdp_init(void);
|
|
extern void vdp_reset(void);
|
|
extern void vdp_shutdown(void);
|
|
extern void vdp_restore(uint8 *vdp_regs);
|
|
extern void vdp_update_dma();
|
|
extern void vdp_ctrl_w(unsigned int data);
|
|
extern unsigned int vdp_ctrl_r(unsigned int cycles);
|
|
extern void vdp_data_w(unsigned int data);
|
|
extern unsigned int vdp_data_r(void);
|
|
extern unsigned int vdp_hvc_r(unsigned int cycles);
|
|
extern void vdp_test_w(unsigned int data);
|
|
extern int vdp_int_ack_callback(int int_level);
|
|
|
|
#endif /* _VDP_H_ */
|