mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-09-20 02:50:16 +00:00
aae22fa1c9
Original commit message from CVS: Based on patches by: Johan Dahlin <johan at gnome dot org> Ronald Bultje <rbultje at ronald dot bitfreak dot net> * configure.ac: * gst/nsf/Makefile.am: * gst/nsf/dis6502.h: * gst/nsf/fds_snd.c: * gst/nsf/fds_snd.h: * gst/nsf/fmopl.c: * gst/nsf/fmopl.h: * gst/nsf/gstnsf.c: * gst/nsf/gstnsf.h: * gst/nsf/log.c: * gst/nsf/log.h: * gst/nsf/memguard.c: * gst/nsf/memguard.h: * gst/nsf/mmc5_snd.c: * gst/nsf/mmc5_snd.h: * gst/nsf/nes6502.c: * gst/nsf/nes6502.h: * gst/nsf/nes_apu.c: * gst/nsf/nes_apu.h: * gst/nsf/nsf.c: * gst/nsf/nsf.h: * gst/nsf/osd.h: * gst/nsf/types.h: * gst/nsf/vrc7_snd.c: * gst/nsf/vrc7_snd.h: * gst/nsf/vrcvisnd.c: * gst/nsf/vrcvisnd.h: Added NSF decoder plugin. Fixes 151192.
160 lines
4 KiB
C
160 lines
4 KiB
C
/*
|
|
** Nofrendo (c) 1998-2000 Matthew Conte (matt@conte.com)
|
|
**
|
|
**
|
|
** This program is free software; you can redistribute it and/or
|
|
** modify it under the terms of version 2 of the GNU Library General
|
|
** Public License as published by the Free Software Foundation.
|
|
**
|
|
** 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
|
|
** Library General Public License for more details. To obtain a
|
|
** copy of the GNU Library General Public License, write to the Free
|
|
** Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
**
|
|
** Any permitted reproduction of these routines, in whole or in part,
|
|
** must bear this legend.
|
|
**
|
|
**
|
|
** nes6502.h
|
|
**
|
|
** NES custom 6502 CPU definitions / prototypes
|
|
** $Id$
|
|
*/
|
|
|
|
/* NOTE: 16-bit addresses avoided like the plague: use 32-bit values
|
|
** wherever humanly possible
|
|
*/
|
|
#ifndef _NES6502_H_
|
|
#define _NES6502_H_
|
|
|
|
/* Define this to enable decimal mode in ADC / SBC (not needed in NES) */
|
|
/*#define NES6502_DECIMAL*/
|
|
|
|
/* number of bank pointers the CPU emulation core handles */
|
|
#ifdef NSF_PLAYER
|
|
#define NES6502_4KBANKS
|
|
#endif
|
|
|
|
#ifdef NES6502_4KBANKS
|
|
#define NES6502_NUMBANKS 16
|
|
#define NES6502_BANKSHIFT 12
|
|
#else
|
|
#define NES6502_NUMBANKS 8
|
|
#define NES6502_BANKSHIFT 13
|
|
#endif
|
|
|
|
#define NES6502_BANKMASK ((0x10000 / NES6502_NUMBANKS) - 1)
|
|
|
|
|
|
/* P (flag) register bitmasks */
|
|
#define N_FLAG 0x80
|
|
#define V_FLAG 0x40
|
|
#define R_FLAG 0x20 /* Reserved, always 1 */
|
|
#define B_FLAG 0x10
|
|
#define D_FLAG 0x08
|
|
#define I_FLAG 0x04
|
|
#define Z_FLAG 0x02
|
|
#define C_FLAG 0x01
|
|
|
|
/* Vector addresses */
|
|
#define NMI_VECTOR 0xFFFA
|
|
#define RESET_VECTOR 0xFFFC
|
|
#define IRQ_VECTOR 0xFFFE
|
|
|
|
/* cycle counts for interrupts */
|
|
#define INT_CYCLES 7
|
|
#define RESET_CYCLES 6
|
|
|
|
#define NMI_MASK 0x01
|
|
#define IRQ_MASK 0x02
|
|
|
|
/* Stack is located on 6502 page 1 */
|
|
#define STACK_OFFSET 0x0100
|
|
|
|
typedef struct
|
|
{
|
|
uint32 min_range, max_range;
|
|
uint8 (*read_func)(uint32 address);
|
|
} nes6502_memread;
|
|
|
|
typedef struct
|
|
{
|
|
uint32 min_range, max_range;
|
|
void (*write_func)(uint32 address, uint8 value);
|
|
} nes6502_memwrite;
|
|
|
|
typedef struct
|
|
{
|
|
uint8 *mem_page[NES6502_NUMBANKS]; /* memory page pointers */
|
|
nes6502_memread *read_handler;
|
|
nes6502_memwrite *write_handler;
|
|
int dma_cycles;
|
|
uint32 pc_reg;
|
|
uint8 a_reg, p_reg, x_reg, y_reg, s_reg;
|
|
uint8 int_pending;
|
|
} nes6502_context;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif /* __cplusplus */
|
|
|
|
/* Functions which govern the 6502's execution */
|
|
extern void nes6502_init(void);
|
|
extern void nes6502_reset(void);
|
|
extern int nes6502_execute(int total_cycles);
|
|
extern void nes6502_nmi(void);
|
|
extern void nes6502_irq(void);
|
|
extern uint8 nes6502_getbyte(uint32 address);
|
|
extern uint32 nes6502_getcycles(boolean reset_flag);
|
|
extern void nes6502_setdma(int cycles);
|
|
|
|
/* Context get/set */
|
|
extern void nes6502_setcontext(nes6502_context *cpu);
|
|
extern void nes6502_getcontext(nes6502_context *cpu);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif /* __cplusplus */
|
|
|
|
#endif /* _NES6502_H_ */
|
|
|
|
/*
|
|
** $Log$
|
|
** Revision 1.1 2006/07/13 15:07:28 wtay
|
|
** Based on patches by: Johan Dahlin <johan at gnome dot org>
|
|
** Ronald Bultje <rbultje at ronald dot bitfreak dot net>
|
|
** * configure.ac:
|
|
** * gst/nsf/Makefile.am:
|
|
** * gst/nsf/dis6502.h:
|
|
** * gst/nsf/fds_snd.c:
|
|
** * gst/nsf/fds_snd.h:
|
|
** * gst/nsf/fmopl.c:
|
|
** * gst/nsf/fmopl.h:
|
|
** * gst/nsf/gstnsf.c:
|
|
** * gst/nsf/gstnsf.h:
|
|
** * gst/nsf/log.c:
|
|
** * gst/nsf/log.h:
|
|
** * gst/nsf/memguard.c:
|
|
** * gst/nsf/memguard.h:
|
|
** * gst/nsf/mmc5_snd.c:
|
|
** * gst/nsf/mmc5_snd.h:
|
|
** * gst/nsf/nes6502.c:
|
|
** * gst/nsf/nes6502.h:
|
|
** * gst/nsf/nes_apu.c:
|
|
** * gst/nsf/nes_apu.h:
|
|
** * gst/nsf/nsf.c:
|
|
** * gst/nsf/nsf.h:
|
|
** * gst/nsf/osd.h:
|
|
** * gst/nsf/types.h:
|
|
** * gst/nsf/vrc7_snd.c:
|
|
** * gst/nsf/vrc7_snd.h:
|
|
** * gst/nsf/vrcvisnd.c:
|
|
** * gst/nsf/vrcvisnd.h:
|
|
** Added NSF decoder plugin. Fixes 151192.
|
|
**
|
|
** Revision 1.4 2000/06/09 15:12:25 matt
|
|
** initial revision
|
|
**
|
|
*/
|