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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: #ifndef MIN
17: # define MIN(a,b) ((a)<(b) ? (a) : (b))
18: #endif
19: #ifndef MAX
20: # define MAX(a,b) ((a)>(b) ? (a) : (b))
21: #endif
22:
23: #define PROG_NAME "Frontier: Elite 2" /* Name, version for window title */
24:
25: #define MAX_FILENAME_LENGTH 256
26: #define MAX_STRING_LENGTH 512
27:
28: #include <stdio.h>
29: #include <stdlib.h>
30: #include <string.h>
31: #include <math.h>
32: #include <time.h>
33: #include <assert.h>
34:
35:
36: #ifndef FALSE
37: #define FALSE 0
38: #define TRUE (!0)
39: #endif
40:
41: #define CALL_VAR(func) { ((void(*)(void))func)(); }
42:
43: /* VM Memory size */
44: #define MEMORY_SIZE (2*1024*1024)
45:
46: /* 68000 operand sizes */
47: #define SIZE_BYTE 1
48: #define SIZE_WORD 2
49: #define SIZE_LONG 4
50:
51: /* 68000 Register defines */
52: enum {
53: REG_D0, /* D0.. */
54: REG_D1,
55: REG_D2,
56: REG_D3,
57: REG_D4,
58: REG_D5,
59: REG_D6,
60: REG_D7, /* ..D7 */
61: REG_A0, /* A0.. */
62: REG_A1,
63: REG_A2,
64: REG_A3,
65: REG_A4,
66: REG_A5,
67: REG_A6,
68: REG_A7, /* ..A7(also SP) */
69: };
70:
71: /* PC Condition code's */
72: #define PC_CARRY 0x0001 /* Bit 0 */
73: #define PC_AUX 0x0010 /* Bit 4 */
74: #define PC_ZERO 0x0040 /* Bit 6 */
75: #define PC_NEG 0x0080 /* Bit 7 */
76: #define PC_OVERFLOW 0x0800 /* Bit 11 */
77:
78: /* 68000 Condition code's */
79: #define SR_AUX 0x0010
80: #define SR_NEG 0x0008
81: #define SR_ZERO 0x0004
82: #define SR_OVERFLOW 0x0002
83: #define SR_CARRY 0x0001
84:
85: #define SR_CLEAR_AUX 0xffef
86: #define SR_CLEAR_NEG 0xfff7
87: #define SR_CLEAR_ZERO 0xfffb
88: #define SR_CLEAR_OVERFLOW 0xfffd
89: #define SR_CLEAR_CARRY 0xfffe
90:
91: #define SR_CCODE_MASK (SR_AUX|SR_NEG|SR_ZERO|SR_OVERFLOW|SR_CARRY)
92: #define SR_MASK 0xFFE0
93:
94: #define SR_TRACEMODE 0x8000
95: #define SR_SUPERMODE 0x2000
96: #define SR_IPL 0x0700
97:
98: #define SR_CLEAR_IPL 0xf8ff
99: #define SR_CLEAR_TRACEMODE 0x7fff
100: #define SR_CLEAR_SUPERMODE 0xdfff
101:
102: /* Emuation condition codes, ordered so can do 'xor al,al' to set XNZVC -0000 */
103: #define EMU_X 0x0100
104: #define EMU_N 0x0080
105: #define EMU_Z 0x0040
106: #define EMU_V 0x0020
107: #define EMU_C 0x0010
108:
109: #define EMU_CLEAR_X 0xfeff
110: #define EMU_CLEAR_N 0xff7f
111: #define EMU_CLEAR_Z 0xffbf
112: #define EMU_CLEAR_V 0xffdf
113: #define EMU_CLEAR_C 0xffef
114:
115: /* Exception vectors */
116: #define EXCEPTION_BUSERROR 0x00000008
117: #define EXCEPTION_ADDRERROR 0x0000000c
118: #define EXCEPTION_ILLEGALINS 0x00000010
119: #define EXCEPTION_DIVZERO 0x00000014
120: #define EXCEPTION_CHK 0x00000018
121: #define EXCEPTION_TRAPV 0x0000001c
122: #define EXCEPTION_TRACE 0x00000024
123: #define EXCEPTION_LINE_A 0x00000028
124: #define EXCEPTION_LINE_F 0x0000002c
125: #define EXCEPTION_HBLANK 0x00000068
126: #define EXCEPTION_VBLANK 0x00000070
127: #define EXCEPTION_INPUT 0x00000074
128: #define EXCEPTION_TRAP0 0x00000080
129: #define EXCEPTION_TRAP1 0x00000084
130: #define EXCEPTION_TRAP2 0x00000088
131: #define EXCEPTION_TRAP13 0x000000B4
132: #define EXCEPTION_TRAP14 0x000000B8
133:
134: /* Find IPL - don't forget to call MakeSR() before you use it! */
135: #define FIND_IPL ((SR>>8)&0x7)
136:
137: /* Size of 68000 instructions */
138: #define MAX_68000_INSTRUCTION_SIZE 10 /* Longest 68000 instruction is 10 bytes(6+4) */
139: #define MIN_68000_INSTRUCTION_SIZE 2 /* Smallest 68000 instruction is 2 bytes(ie NOP) */
140:
141: /*
142: All the following processor timings are based on a bog standard 8MHz 68000 as found in all standard ST's
143:
144: Clock cycles per line (50Hz) : 512
145: NOPs per scan line (50Hz) : 128
146: Scan lines per VBL (50Hz) : 313 (64 at top,200 screen,49 bottom)
147:
148: Clock cycles per line (60Hz) : 508
149: NOPs per scan line (60Hz) : 127
150: Scan lines per VBL (60Hz) : 263
151:
152: Clock cycles per VBL (50Hz) : 160256
153: NOPs per VBL (50Hz) : 40064
154:
155: Pixels per clock cycle (low res) : 1
156: Pixels per clock cycle (med res) : 2
157: Pixels per clock cycle (high res) : 4
158: Pixels per NOP (low res) : 4
159: Pixels per NOP (med res) : 8
160: Pixels per NOP (high res) : 16
161: */
162: #define SCREEN_HEIGHT_HBL 200 /* This is usually the height of the screen */
163:
164: #define SCREENBYTES_LINE 320
165:
166: #define SCREEN_START_CYCLE 96 /* Cycle first normal pixel appears on */
167: #define SCANLINES_PER_FRAME 313 /* Number of scan lines per frame */
168: #define CYCLES_PER_LINE 512 /* Cycles per horiztonal line scan */
169: #define CYCLES_PER_FRAME (SCANLINES_PER_FRAME*CYCLES_PER_LINE) /* Cycles per VBL @ 50fps = 160256 */
170: #define CYCLES_PER_SEC (CYCLES_PER_FRAME*50) /* Cycles per second */
171: #define CYCLES_ENDLINE (64+320+88+40) /* DE(Display Enable) */
172: #define CYCLES_HBL (CYCLES_PER_LINE+96) /* Cycles for first HBL - very inaccurate on ST */
173: #define CYCLES_DEBUGGER 3000 /* Check debugger every 'x' cycles */
174:
175: /* Illegal Opcode used to call C code from 68k emu */
176: #define HOSTCALL_OPCODE 10 /* Free op-code to initialize system (connected drives etc.) */
177: #define HCALL_OPCODE 11
178:
179: #define PRG_HEADER_SIZE 0x1c /* Size of header at start of ST .prg files */
180:
181:
182: extern BOOL bQuitProgram;
183: extern BOOL bEmulationActive;
184: extern char szName[];
185: extern char szBootDiscImage[MAX_FILENAME_LENGTH];
186: extern char szWorkingDir[MAX_FILENAME_LENGTH];
187: extern char szCurrentDir[MAX_FILENAME_LENGTH];
188:
189: extern void Main_SysError(char *Error,char *Title);
190: extern int Main_Message(char *lpText, char *lpCaption /*, unsigned int uType*/);
191: extern void Main_PauseEmulation(void);
192: extern void Main_UnPauseEmulation(void);
193: extern void Main_EventHandler();
194:
195: #endif /* ifndef HATARI_MAIN_H */
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