c62d2810 |
1 | /* FCE Ultra - NES/Famicom Emulator |
2 | * |
3 | * Copyright notice for this file: |
4 | * Copyright (C) 2002 Ben Parnell |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | |
21 | typedef struct { |
22 | int32 count; /* Cycle counter */ |
23 | int32 tcount; /* Temporary cycle counter */ |
24 | uint16 PC; /* I'll change this to uint32 later... */ |
25 | /* I'll need to AND PC after increments to 0xFFFF */ |
26 | /* when I do, though. Perhaps an IPC() macro? */ |
27 | uint8 A,X,Y,S,P,mooPI,PZ; |
28 | uint8 DB; /* Data bus "cache" for reads from certain areas */ |
29 | uint8 IRQlow; /* Simulated IRQ pin held low(or is it high?). */ |
30 | uint8 jammed; |
31 | } X6502; |
32 | |
33 | extern X6502 X; |
34 | |
35 | #define N_FLAG 0x80 |
36 | #define V_FLAG 0x40 |
37 | #define U_FLAG 0x20 |
38 | #define B_FLAG 0x10 |
39 | #define D_FLAG 0x08 |
40 | #define I_FLAG 0x04 |
41 | #define Z_FLAG 0x02 |
42 | #define C_FLAG 0x01 |
43 | |
44 | extern uint32 timestamp; |
45 | extern void FP_FASTAPASS(1) (*MapIRQHook)(int a); |
46 | |
47 | #define NTSC_CPU 1789772.7272727272727272 |
48 | #define PAL_CPU 1662607.125 |
49 | |
50 | #define FCEU_IQEXT 0x01 |
51 | #define FCEU_IQNMI 0x08 |
52 | #define FCEU_IQDPCM 0x10 |
53 | #define FCEU_IQFCOUNT 0x20 |
54 | #define FCEU_IQTEMP 0x80 |
55 | |
56 | void X6502_Reset(void); |
57 | void X6502_Power(void); |
58 | void X6502_Run(int32 cycles); |
59 | |
60 | void TriggerIRQ(void); |
61 | void TriggerNMI(void); |
62 | void TriggerNMINSF(void); |
63 | |
64 | void FASTAPASS(1) X6502_AddCycles(int x); |
65 | void FASTAPASS(1) X6502_IRQBegin(int w); |
66 | void FASTAPASS(1) X6502_IRQEnd(int w); |