2 // Virtual 65C02 Header file
5 // (c) 2005 Underground Software
15 #define FLAG_N 0x80 // Negative
16 #define FLAG_V 0x40 // oVerflow
17 #define FLAG_UNK 0x20 // ??? (always set when read?)
18 #define FLAG_B 0x10 // Break
19 #define FLAG_D 0x08 // Decimal
20 #define FLAG_I 0x04 // Interrupt
21 #define FLAG_Z 0x02 // Zero
22 #define FLAG_C 0x01 // Carry
24 #define V65C02_ASSERT_LINE_RESET 0x0001 // v65C02 RESET line
25 #define V65C02_ASSERT_LINE_IRQ 0x0002 // v65C02 IRQ line
26 #define V65C02_ASSERT_LINE_NMI 0x0004 // v65C02 NMI line
27 #define V65C02_STATE_ILLEGAL_INST 0x0008 // Illegal instruction executed flag
28 //#define V65C02_START_DEBUG_LOG 0x0020 // Debug log go (temporary!)
34 uint16 pc; // 65C02 PC register
35 uint8 cc; // 65C02 Condition Code register
36 uint8 sp; // 65C02 System stack pointer (bound to $01xx)
37 uint8 a; // 65C02 A register
38 uint8 x; // 65C02 X index register
39 uint8 y; // 65C02 Y register
40 // uint32 clock; // 65C02 clock (@ 1 MHz, wraps at 71.5 minutes)
41 uint64 clock; // 65C02 clock (@ 1 MHz, wraps at 570842 years)
42 uint8 (* RdMem)(uint16); // Address of BYTE read routine
43 void (* WrMem)(uint16, uint8); // Address of BYTE write routine
44 uint16 cpuFlags; // v65C02 IRQ/RESET flags
47 // Global variables (exported)
51 // Function prototypes
53 void Execute65C02(V65C02REGS *, uint32); // Function to execute 65C02 instructions
54 uint64 GetCurrentV65C02Clock(void); // Get the clock of the currently executing CPU
56 #endif // __V65C02_H__