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1.1 root 1: /*
2: Hatari - main.h
3:
4: This file is distributed under the GNU Public License, version 2 or at
5: your option any later version. Read the file gpl.txt for details.
6: */
7:
8: #ifndef HATARI_MAIN_H
9: #define HATARI_MAIN_H
10:
11: typedef int BOOL;
12: #ifndef bool
13: typedef int bool;
14: #endif /* bool */
15:
16: #define PROG_NAME "Frontier: Elite 2" /* Name, version for window title */
17:
18: #define MAX_FILENAME_LENGTH 256
19: #define MAX_STRING_LENGTH 512
20:
21: #include <stdio.h>
22: #include <stdlib.h>
23: #include <string.h>
24: #include <math.h>
25: #include <time.h>
26: #include <assert.h>
27:
28:
29: #ifndef FALSE
30: #define FALSE 0
31: #define TRUE (!0)
32: #endif
33:
34: #define CALL_VAR(func) { ((void(*)(void))func)(); }
35:
36: /* VM Memory size */
37: #define MEMORY_SIZE (16*1024*1024)
38:
39: /* 68000 operand sizes */
40: #define SIZE_BYTE 1
41: #define SIZE_WORD 2
42: #define SIZE_LONG 4
43:
44: /* 68000 Register defines */
45: enum {
46: REG_D0, /* D0.. */
47: REG_D1,
48: REG_D2,
49: REG_D3,
50: REG_D4,
51: REG_D5,
52: REG_D6,
53: REG_D7, /* ..D7 */
54: REG_A0, /* A0.. */
55: REG_A1,
56: REG_A2,
57: REG_A3,
58: REG_A4,
59: REG_A5,
60: REG_A6,
61: REG_A7, /* ..A7(also SP) */
62: };
63:
64: /* PC Condition code's */
65: #define PC_CARRY 0x0001 /* Bit 0 */
66: #define PC_AUX 0x0010 /* Bit 4 */
67: #define PC_ZERO 0x0040 /* Bit 6 */
68: #define PC_NEG 0x0080 /* Bit 7 */
69: #define PC_OVERFLOW 0x0800 /* Bit 11 */
70:
71: /* 68000 Condition code's */
72: #define SR_AUX 0x0010
73: #define SR_NEG 0x0008
74: #define SR_ZERO 0x0004
75: #define SR_OVERFLOW 0x0002
76: #define SR_CARRY 0x0001
77:
78: #define SR_CLEAR_AUX 0xffef
79: #define SR_CLEAR_NEG 0xfff7
80: #define SR_CLEAR_ZERO 0xfffb
81: #define SR_CLEAR_OVERFLOW 0xfffd
82: #define SR_CLEAR_CARRY 0xfffe
83:
84: #define SR_CCODE_MASK (SR_AUX|SR_NEG|SR_ZERO|SR_OVERFLOW|SR_CARRY)
85: #define SR_MASK 0xFFE0
86:
87: #define SR_TRACEMODE 0x8000
88: #define SR_SUPERMODE 0x2000
89: #define SR_IPL 0x0700
90:
91: #define SR_CLEAR_IPL 0xf8ff
92: #define SR_CLEAR_TRACEMODE 0x7fff
93: #define SR_CLEAR_SUPERMODE 0xdfff
94:
95: /* Emuation condition codes, ordered so can do 'xor al,al' to set XNZVC -0000 */
96: #define EMU_X 0x0100
97: #define EMU_N 0x0080
98: #define EMU_Z 0x0040
99: #define EMU_V 0x0020
100: #define EMU_C 0x0010
101:
102: #define EMU_CLEAR_X 0xfeff
103: #define EMU_CLEAR_N 0xff7f
104: #define EMU_CLEAR_Z 0xffbf
105: #define EMU_CLEAR_V 0xffdf
106: #define EMU_CLEAR_C 0xffef
107:
108: /* Exception vectors */
109: #define EXCEPTION_BUSERROR 0x00000008
110: #define EXCEPTION_ADDRERROR 0x0000000c
111: #define EXCEPTION_ILLEGALINS 0x00000010
112: #define EXCEPTION_DIVZERO 0x00000014
113: #define EXCEPTION_CHK 0x00000018
114: #define EXCEPTION_TRAPV 0x0000001c
115: #define EXCEPTION_TRACE 0x00000024
116: #define EXCEPTION_LINE_A 0x00000028
117: #define EXCEPTION_LINE_F 0x0000002c
118: #define EXCEPTION_HBLANK 0x00000068
119: #define EXCEPTION_VBLANK 0x00000070
120: #define EXCEPTION_INPUT 0x00000074
121: #define EXCEPTION_TRAP0 0x00000080
122: #define EXCEPTION_TRAP1 0x00000084
123: #define EXCEPTION_TRAP2 0x00000088
124: #define EXCEPTION_TRAP13 0x000000B4
125: #define EXCEPTION_TRAP14 0x000000B8
126:
127: /* Find IPL - don't forget to call MakeSR() before you use it! */
128: #define FIND_IPL ((SR>>8)&0x7)
129:
130: /* Size of 68000 instructions */
131: #define MAX_68000_INSTRUCTION_SIZE 10 /* Longest 68000 instruction is 10 bytes(6+4) */
132: #define MIN_68000_INSTRUCTION_SIZE 2 /* Smallest 68000 instruction is 2 bytes(ie NOP) */
133:
134: /*
135: All the following processor timings are based on a bog standard 8MHz 68000 as found in all standard ST's
136:
137: Clock cycles per line (50Hz) : 512
138: NOPs per scan line (50Hz) : 128
139: Scan lines per VBL (50Hz) : 313 (64 at top,200 screen,49 bottom)
140:
141: Clock cycles per line (60Hz) : 508
142: NOPs per scan line (60Hz) : 127
143: Scan lines per VBL (60Hz) : 263
144:
145: Clock cycles per VBL (50Hz) : 160256
146: NOPs per VBL (50Hz) : 40064
147:
148: Pixels per clock cycle (low res) : 1
149: Pixels per clock cycle (med res) : 2
150: Pixels per clock cycle (high res) : 4
151: Pixels per NOP (low res) : 4
152: Pixels per NOP (med res) : 8
153: Pixels per NOP (high res) : 16
154: */
155: #define SCREEN_HEIGHT_HBL 200 /* This is usually the height of the screen */
156:
157: #define SCREENBYTES_LINE 320
158:
159: #define SCREEN_START_CYCLE 96 /* Cycle first normal pixel appears on */
160: #define SCANLINES_PER_FRAME 313 /* Number of scan lines per frame */
161: #define CYCLES_PER_LINE 512 /* Cycles per horiztonal line scan */
162: #define CYCLES_PER_FRAME (SCANLINES_PER_FRAME*CYCLES_PER_LINE) /* Cycles per VBL @ 50fps = 160256 */
163: #define CYCLES_PER_SEC (CYCLES_PER_FRAME*50) /* Cycles per second */
164: #define CYCLES_ENDLINE (64+320+88+40) /* DE(Display Enable) */
165: #define CYCLES_HBL (CYCLES_PER_LINE+96) /* Cycles for first HBL - very inaccurate on ST */
166: #define CYCLES_DEBUGGER 3000 /* Check debugger every 'x' cycles */
167:
168: /* Illegal Opcode used to call C code from 68k emu */
169: #define HOSTCALL_OPCODE 10 /* Free op-code to initialize system (connected drives etc.) */
170: #define HCALL_OPCODE 11
171:
172: #define PRG_HEADER_SIZE 0x1c /* Size of header at start of ST .prg files */
173:
174:
175: extern BOOL bQuitProgram;
176: extern BOOL bEmulationActive;
177: extern char szName[];
178: extern char szBootDiscImage[MAX_FILENAME_LENGTH];
179: extern char szWorkingDir[MAX_FILENAME_LENGTH];
180: extern char szCurrentDir[MAX_FILENAME_LENGTH];
181:
182: extern void Main_SysError(char *Error,char *Title);
183: extern int Main_Message(char *lpText, char *lpCaption /*, unsigned int uType*/);
184: extern void Main_PauseEmulation(void);
185: extern void Main_UnPauseEmulation(void);
186: extern void Main_EventHandler();
187:
188: #endif /* ifndef HATARI_MAIN_H */
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