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56 lines
1.6 KiB
C
Executable File
56 lines
1.6 KiB
C
Executable File
//
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// Virtual 65C02 Header file
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//
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// by James L. Hammons
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// (c) 2005 Underground Software
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//
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#ifndef __V65C02_H__
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#define __V65C02_H__
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#include "types.h"
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// Useful defines
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#define FLAG_N 0x80 // Negative
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#define FLAG_V 0x40 // oVerflow
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#define FLAG_UNK 0x20 // ??? (always set when read?)
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#define FLAG_B 0x10 // Break
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#define FLAG_D 0x08 // Decimal
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#define FLAG_I 0x04 // Interrupt
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#define FLAG_Z 0x02 // Zero
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#define FLAG_C 0x01 // Carry
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#define V65C02_ASSERT_LINE_RESET 0x0001 // v65C02 RESET line
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#define V65C02_ASSERT_LINE_IRQ 0x0002 // v65C02 IRQ line
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#define V65C02_ASSERT_LINE_NMI 0x0004 // v65C02 NMI line
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#define V65C02_STATE_ILLEGAL_INST 0x0008 // Illegal instruction executed flag
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//#define V65C02_START_DEBUG_LOG 0x0020 // Debug log go (temporary!)
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// Useful structs
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struct V65C02REGS
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{
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uint16 pc; // 65C02 PC register
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uint8 cc; // 65C02 Condition Code register
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uint8 sp; // 65C02 System stack pointer (bound to $01xx)
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uint8 a; // 65C02 A register
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uint8 x; // 65C02 X index register
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uint8 y; // 65C02 Y register
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uint32 clock; // 65C02 clock
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uint8 (* RdMem)(uint16); // Address of BYTE read routine
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void (* WrMem)(uint16, uint8); // Address of BYTE write routine
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uint16 cpuFlags; // v65C02 IRQ/RESET flags
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};
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// Global variables (exported)
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extern bool dumpDis;
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// Function prototypes
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void Execute65C02(V65C02REGS *, uint32); // Function to execute 65C02 instructions
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uint32 GetCurrentV65C02Clock(void); // Get the clock of the currently executing CPU
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#endif // __V65C02_H__
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