add 6502 CPU emu

src/6502types.h

@@ -0,0 +1,85 @@
+#ifndef F6502TYPES_H_INCLUDED
+#define F6502TYPES_H_INCLUDED
+
+#if defined(__BEOS__) || defined(__TRU64__)
+    #include <inttypes.h>
+#else
+    #include <stdint.h>
+#endif
+
+typedef unsigned int zusize;
+typedef uint8_t zuint8;
+typedef uint16_t zuint16;
+typedef uint8_t zboolean;
+typedef unsigned int zuint;
+typedef int8_t zsint8;
+
+#ifndef NULL
+#define NULL ((void *)0)
+#endif
+#ifndef FALSE
+#define FALSE 0
+#endif
+#ifndef TRUE
+#define TRUE 1
+#endif
+
+/* MARK: - Addresses */
+
+#define Z_6502_ADDRESS_NMI_POINTER   0xFFFA
+#define Z_6502_ADDRESS_RESET_POINTER 0XFFFC
+#define Z_6502_ADDRESS_IRQ_POINTER   0xFFFE
+#define Z_6502_ADDRESS_BRK_POINTER   0xFFFE
+#define Z_6502_ADDRESS_STACK	     0x0100
+
+/* MARK: - Values after power on */
+
+#define Z_6502_VALUE_AFTER_POWER_ON_PC 0x0000
+#define Z_6502_VALUE_AFTER_POWER_ON_S  0xFD
+#define Z_6502_VALUE_AFTER_POWER_ON_P  0x36
+#define Z_6502_VALUE_AFTER_POWER_ON_A  0x00
+#define Z_6502_VALUE_AFTER_POWER_ON_X  0x00
+#define Z_6502_VALUE_AFTER_POWER_ON_Y  0x00
+
+/* MARK: - State storage type */
+typedef struct {
+	zuint16 pc;
+	zuint8	s, p, a, x, y;
+
+	struct {zuint8 irq :1;
+		zuint8 nmi :1;
+	} internal;
+} Z6502State;
+
+#define Z_6502_STATE_PC( object) (object)->pc
+#define Z_6502_STATE_S(	 object) (object)->s
+#define Z_6502_STATE_P(	 object) (object)->p
+#define Z_6502_STATE_A(	 object) (object)->a
+#define Z_6502_STATE_X(	 object) (object)->x
+#define Z_6502_STATE_Y(	 object) (object)->y
+#define Z_6502_STATE_NMI(object) (object)->internal.nmi
+#define Z_6502_STATE_IRQ(object) (object)->internal.irq
+
+#define Z_6502_STATE_MEMBER_PC	pc
+#define Z_6502_STATE_MEMBER_S	s
+#define Z_6502_STATE_MEMBER_P	p
+#define Z_6502_STATE_MEMBER_A	a
+#define Z_6502_STATE_MEMBER_X	x
+#define Z_6502_STATE_MEMBER_Y	y
+#define Z_6502_STATE_MEMBER_NMI internal.nmi
+#define Z_6502_STATE_MEMBER_IRQ internal.irq
+
+#ifdef __cplusplus
+#	define Z_C_SYMBOLS_BEGIN extern "C" {
+#	define Z_C_SYMBOLS_END	 }
+#else
+#	define Z_C_SYMBOLS_BEGIN
+#	define Z_C_SYMBOLS_END
+#endif
+
+#define Z_INLINE
+
+#define Z_EMPTY_(dummy)
+#define Z_EMPTY Z_EMPTY_(.)
+
+#endif