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apple2ix/src/cpu-supp.c

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/*
* Apple // emulator for *ix
*
* This software package is subject to the GNU General Public License
* version 3 or later (your choice) as published by the Free Software
* Foundation.
*
* Copyright 1994 Alexander Jean-Claude Bottema
* Copyright 1995 Stephen Lee
* Copyright 1997, 1998 Aaron Culliney
* Copyright 1998, 1999, 2000 Michael Deutschmann
* Copyright 2013-2015 Aaron Culliney
*
*/
#if CPU_TRACING
# if VM_TRACING
# define RESET_VM_TRACING 1
# endif
# undef VM_TRACING
#endif
#include "common.h"
uint16_t cpu65_pc;
uint8_t cpu65_a;
uint8_t cpu65_f;
uint8_t cpu65_x;
uint8_t cpu65_y;
uint8_t cpu65_sp;
uint16_t cpu65_ea;
uint8_t cpu65_d;
uint8_t cpu65_rw;
uint8_t cpu65_opcode;
uint8_t cpu65_opcycles;
uint8_t cpu65__signal = 0;
static pthread_mutex_t irq_mutex = PTHREAD_MUTEX_INITIALIZER;
uint8_t cpu65_flags_encode[256] = { 0 };
uint8_t cpu65_flags_decode[256] = { 0 };
void *cpu65_vmem_r[0x10000] = { 0 };
void *cpu65_vmem_w[0x10000] = { 0 };
#if CPU_TRACING
static int8_t opargs[3] = { 0 };
static int8_t nargs = 0;
static uint16_t current_pc = 0x0;
static FILE *cpu_trace_fp = NULL;
#endif
// ----------------------------------------------------------------------------
// 65c02 Opcode Jump Table
extern void op_BRK(), op_ORA_ind_x(), op_UNK_65c02(), op_TSB_zpage(), op_ORA_zpage(), op_ASL_zpage(), op_RMB0_65c02(), op_PHP(), op_ORA_imm(), op_ASL_acc(), op_TSB_abs(), op_ORA_abs(), op_ASL_abs(), op_BBR0_65c02(), op_BPL(), op_ORA_ind_y(), op_ORA_ind_zpage(), op_TRB_zpage(), op_ORA_zpage_x(), op_ASL_zpage_x(), op_RMB1_65c02(), op_CLC(), op_ORA_abs_y(), op_INA(), op_TRB_abs(), op_ORA_abs_x(), op_ASL_abs_x(), op_BBR1_65c02(), op_JSR(), op_AND_ind_x(), op_BIT_zpage(), op_AND_zpage(), op_ROL_zpage(), op_RMB2_65c02(), op_PLP(), op_AND_imm(), op_ROL_acc(), op_BIT_abs(), op_AND_abs(), op_ROL_abs(), op_BBR2_65c02(), op_BMI(), op_AND_ind_y(), op_AND_ind_zpage(), op_BIT_zpage_x(), op_AND_zpage_x(), op_ROL_zpage_x(), op_RMB3_65c02(), op_SEC(), op_AND_abs_y(), op_DEA(), op_BIT_abs_x(), op_AND_abs_x(), op_ROL_abs_x(), op_BBR3_65c02(), op_RTI(), op_EOR_ind_x(), op_EOR_zpage(), op_LSR_zpage(), op_RMB4_65c02(), op_PHA(), op_EOR_imm(), op_LSR_acc(), op_JMP_abs(), op_EOR_abs(), op_LSR_abs(), op_BBR4_65c02(), op_BVC(), op_EOR_ind_y(), op_EOR_ind_zpage(), op_EOR_zpage_x(), op_LSR_zpage_x(), op_RMB5_65c02(), op_CLI(), op_EOR_abs_y(), op_PHY(), op_EOR_abs_x(), op_LSR_abs_x(), op_BBR5_65c02(), op_RTS(), op_ADC_ind_x(), op_STZ_zpage(), op_ADC_zpage(), op_ROR_zpage(), op_RMB6_65c02(), op_PLA(), op_ADC_imm(), op_ROR_acc(), op_JMP_ind(), op_ADC_abs(), op_ROR_abs(), op_BBR6_65c02(), op_BVS(), op_ADC_ind_y(), op_ADC_ind_zpage(), op_STZ_zpage_x(), op_ADC_zpage_x(), op_ROR_zpage_x(), op_RMB7_65c02(), op_SEI(), op_ADC_abs_y(), op_PLY(), op_JMP_abs_ind_x(), op_ADC_abs_x(), op_ROR_abs_x(), op_BBR7_65c02(), op_BRA(), op_STA_ind_x(), op_STY_zpage(), op_STA_zpage(), op_STX_zpage(), op_SMB0_65c02(), op_DEY(), op_BIT_imm(), op_TXA(), op_STY_abs(), op_STA_abs(), op_STX_abs(), op_BBS0_65c02(), op_BCC(), op_STA_ind_y(), op_STA_ind_zpage(), op_STY_zpage_x(), op_STA_zpage_x(), op_STX_zpage_y(), op_SMB1_65c02(), op_TYA(), op_STA_abs_y(), op_TXS(), op_STZ_abs(), op_STA_abs_x(), op_STZ_abs_x(), op_BBS1_65c02(), op_LDY_imm(), op_LDA_ind_x(), op_LDX_imm(), op_LDY_zpage(), op_LDA_zpage(), op_LDX_zpage(), op_SMB2_65c02(), op_TAY(), op_LDA_imm(), op_TAX(), op_LDY_abs(), op_LDA_abs(), op_LDX_abs(), op_BBS2_65c02(), op_BCS(), op_LDA_ind_y(), op_LDA_ind_zpage(), op_LDY_zpage_x(), op_LDA_zpage_x(), op_LDX_zpage_y(), op_SMB3_65c02(), op_CLV(), op_LDA_abs_y(), op_TSX(), op_LDY_abs_x(), op_LDA_abs_x(), op_LDX_abs_y(), op_BBS3_65c02(), op_CPY_imm(), op_CMP_ind_x(), op_CPY_zpage(), op_CMP_zpage(), op_DEC_zpage(), op_SMB4_65c02(), op_INY(), op_CMP_imm(), op_DEX(), op_WAI_65c02(), op_CPY_abs(), op_CMP_abs(), op_DEC_abs(), op_BBS4_65c02(), op_BNE(), op_CMP_ind_y(), op_CMP_ind_zpage(), op_CMP_zpage_x(), op_DEC_zpage_x(), op_SMB5_65c02(), op_CLD(), op_CMP_abs_y(), op_PHX(), op_STP_65c02(), op_CMP_abs_x(), op_DEC_abs_x(), op_BBS5_65c02(), op_CPX_imm(), op_SBC_ind_x(), op_CPX_zpage(), op_SBC_zpage(), op_INC_zpage(), op_SMB6_65c02(), op_INX(), op_SBC_imm(), op_NOP(), op_CPX_abs(), op_SBC_abs(), op_INC_abs(), op_BBS6_65c02(), op_BEQ(), op_SBC_ind_y(), op_SBC_ind_zpage(), op_SBC_zpage_x(), op_INC_zpage_x(), op_SMB7_65c02(), op_SED(), op_SBC_abs_y(), op_PLX(), op_SBC_abs_x(), op_INC_abs_x(), op_BBS7_65c02();
void *const cpu65__opcodes[256] = {
op_BRK, // 00
op_ORA_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_TSB_zpage,
op_ORA_zpage,
op_ASL_zpage,
op_RMB0_65c02,
op_PHP, // 08
op_ORA_imm,
op_ASL_acc,
op_UNK_65c02,
op_TSB_abs,
op_ORA_abs,
op_ASL_abs,
op_BBR0_65c02,
op_BPL, // 10
op_ORA_ind_y,
op_ORA_ind_zpage,
op_UNK_65c02,
op_TRB_zpage,
op_ORA_zpage_x,
op_ASL_zpage_x,
op_RMB1_65c02,
op_CLC, // 18
op_ORA_abs_y,
op_INA,
op_UNK_65c02,
op_TRB_abs,
op_ORA_abs_x,
op_ASL_abs_x,
op_BBR1_65c02,
op_JSR, // 20
op_AND_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_BIT_zpage,
op_AND_zpage,
op_ROL_zpage,
op_RMB2_65c02,
op_PLP, // 28
op_AND_imm,
op_ROL_acc,
op_UNK_65c02,
op_BIT_abs,
op_AND_abs,
op_ROL_abs,
op_BBR2_65c02,
op_BMI, // 30
op_AND_ind_y,
op_AND_ind_zpage,
op_UNK_65c02,
op_BIT_zpage_x,
op_AND_zpage_x,
op_ROL_zpage_x,
op_RMB3_65c02,
op_SEC, // 38
op_AND_abs_y,
op_DEA,
op_UNK_65c02,
op_BIT_abs_x,
op_AND_abs_x,
op_ROL_abs_x,
op_BBR3_65c02,
op_RTI, // 40
op_EOR_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_UNK_65c02,
op_EOR_zpage,
op_LSR_zpage,
op_RMB4_65c02,
op_PHA, // 48
op_EOR_imm,
op_LSR_acc,
op_UNK_65c02,
op_JMP_abs,
op_EOR_abs,
op_LSR_abs,
op_BBR4_65c02,
op_BVC, // 50
op_EOR_ind_y,
op_EOR_ind_zpage,
op_UNK_65c02,
op_UNK_65c02,
op_EOR_zpage_x,
op_LSR_zpage_x,
op_RMB5_65c02,
op_CLI, // 58
op_EOR_abs_y,
op_PHY,
op_UNK_65c02,
op_UNK_65c02,
op_EOR_abs_x,
op_LSR_abs_x,
op_BBR5_65c02,
op_RTS, // 60
op_ADC_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_STZ_zpage,
op_ADC_zpage,
op_ROR_zpage,
op_RMB6_65c02,
op_PLA, // 68
op_ADC_imm,
op_ROR_acc,
op_UNK_65c02,
op_JMP_ind,
op_ADC_abs,
op_ROR_abs,
op_BBR6_65c02,
op_BVS, // 70
op_ADC_ind_y,
op_ADC_ind_zpage,
op_UNK_65c02,
op_STZ_zpage_x,
op_ADC_zpage_x,
op_ROR_zpage_x,
op_RMB7_65c02,
op_SEI, // 78
op_ADC_abs_y,
op_PLY,
op_UNK_65c02,
op_JMP_abs_ind_x,
op_ADC_abs_x,
op_ROR_abs_x,
op_BBR7_65c02,
op_BRA, // 80
op_STA_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_STY_zpage,
op_STA_zpage,
op_STX_zpage,
op_SMB0_65c02,
op_DEY, // 88
op_BIT_imm,
op_TXA,
op_UNK_65c02,
op_STY_abs,
op_STA_abs,
op_STX_abs,
op_BBS0_65c02,
op_BCC, // 90
op_STA_ind_y,
op_STA_ind_zpage,
op_UNK_65c02,
op_STY_zpage_x,
op_STA_zpage_x,
op_STX_zpage_y,
op_SMB1_65c02,
op_TYA, // 98
op_STA_abs_y,
op_TXS,
op_UNK_65c02,
op_STZ_abs,
op_STA_abs_x,
op_STZ_abs_x,
op_BBS1_65c02,
op_LDY_imm, // A0
op_LDA_ind_x,
op_LDX_imm,
op_UNK_65c02,
op_LDY_zpage,
op_LDA_zpage,
op_LDX_zpage,
op_SMB2_65c02,
op_TAY, // A8
op_LDA_imm,
op_TAX,
op_UNK_65c02,
op_LDY_abs,
op_LDA_abs,
op_LDX_abs,
op_BBS2_65c02,
op_BCS, // B0
op_LDA_ind_y,
op_LDA_ind_zpage,
op_UNK_65c02,
op_LDY_zpage_x,
op_LDA_zpage_x,
op_LDX_zpage_y,
op_SMB3_65c02,
op_CLV, // B8
op_LDA_abs_y,
op_TSX,
op_UNK_65c02,
op_LDY_abs_x,
op_LDA_abs_x,
op_LDX_abs_y,
op_BBS3_65c02,
op_CPY_imm, // C0
op_CMP_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_CPY_zpage,
op_CMP_zpage,
op_DEC_zpage,
op_SMB4_65c02,
op_INY, // C8
op_CMP_imm,
op_DEX,
op_WAI_65c02,
op_CPY_abs,
op_CMP_abs,
op_DEC_abs,
op_BBS4_65c02,
op_BNE, // D0
op_CMP_ind_y,
op_CMP_ind_zpage,
op_UNK_65c02,
op_UNK_65c02,
op_CMP_zpage_x,
op_DEC_zpage_x,
op_SMB5_65c02,
op_CLD, // D8
op_CMP_abs_y,
op_PHX,
op_STP_65c02,
op_UNK_65c02,
op_CMP_abs_x,
op_DEC_abs_x,
op_BBS5_65c02,
op_CPX_imm, // E0
op_SBC_ind_x,
op_UNK_65c02,
op_UNK_65c02,
op_CPX_zpage,
op_SBC_zpage,
op_INC_zpage,
op_SMB6_65c02,
op_INX, // E8
op_SBC_imm,
op_NOP,
op_UNK_65c02,
op_CPX_abs,
op_SBC_abs,
op_INC_abs,
op_BBS6_65c02,
op_BEQ, // F0
op_SBC_ind_y,
op_SBC_ind_zpage,
op_UNK_65c02,
op_UNK_65c02,
op_SBC_zpage_x,
op_INC_zpage_x,
op_SMB7_65c02,
op_SED, // F8
op_SBC_abs_y,
op_PLX,
op_UNK_65c02,
op_UNK_65c02,
op_SBC_abs_x,
op_INC_abs_x,
op_BBS7_65c02
};
// ----------------------------------------------------------------------------
// Base values for opcode cycle counts
uint8_t cpu65__opcycles[256] = {
7, // op_BRK 00
6, // op_ORA_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
5, // op_TSB_zpage
3, // op_ORA_zpage
5, // op_ASL_zpage
5, // op_RMB0_65c02
3, // op_PHP 08
2, // op_ORA_imm
2, // op_ASL_acc
7, // op_UNK_65c02
6, // op_TSB_abs
4, // op_ORA_abs
6, // op_ASL_abs
5, // op_BBR0_65c02
2, // op_BPL 10
5, // op_ORA_ind_y
5, // op_ORA_ind_zpage
7, // op_UNK_65c02
5, // op_TRB_zpage
4, // op_ORA_zpage_x
6, // op_ASL_zpage_x
5, // op_RMB1_65c02
2, // op_CLC 18
4, // op_ORA_abs_y
2, // op_INA
7, // op_UNK_65c02
6, // op_TRB_abs
4, // op_ORA_abs_x
6, // op_ASL_abs_x
5, // op_BBR1_65c02
6, // op_JSR 20
6, // op_AND_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_BIT_zpage
3, // op_AND_zpage
5, // op_ROL_zpage
5, // op_RMB2_65c02
4, // op_PLP 28
2, // op_AND_imm
2, // op_ROL_acc
7, // op_UNK_65c02
4, // op_BIT_abs
4, // op_AND_abs
6, // op_ROL_abs
5, // op_BBR2_65c02
2, // op_BMI 30
5, // op_AND_ind_y
5, // op_AND_ind_zpage
7, // op_UNK_65c02
4, // op_BIT_zpage_x
4, // op_AND_zpage_x
6, // op_ROL_zpage_x
5, // op_RMB3_65c02
2, // op_SEC 38
4, // op_AND_abs_y
2, // op_DEA
7, // op_UNK_65c02
4, // op_BIT_abs_x
4, // op_AND_abs_x
6, // op_ROL_abs_x
5, // op_BBR3_65c02
6, // op_RTI 40
6, // op_EOR_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_EOR_zpage
5, // op_LSR_zpage
5, // op_RMB4_65c02
3, // op_PHA 48
2, // op_EOR_imm
2, // op_LSR_acc
7, // op_UNK_65c02
3, // op_JMP_abs
4, // op_EOR_abs
6, // op_LSR_abs
5, // op_BBR4_65c02
2, // op_BVC 50
5, // op_EOR_ind_y
5, // op_EOR_ind_zpage
7, // op_UNK_65c02
7, // op_UNK_65c02
4, // op_EOR_zpage_x
6, // op_LSR_zpage_x
5, // op_RMB5_65c02
2, // op_CLI 58
4, // op_EOR_abs_y
3, // op_PHY
7, // op_UNK_65c02
7, // op_UNK_65c02
4, // op_EOR_abs_x
6, // op_LSR_abs_x
5, // op_BBR5_65c02
6, // op_RTS 60
6, // op_ADC_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_STZ_zpage
3, // op_ADC_zpage
5, // op_ROR_zpage
5, // op_RMB6_65c02
4, // op_PLA 68
2, // op_ADC_imm
2, // op_ROR_acc
7, // op_UNK_65c02
6, // op_JMP_ind
4, // op_ADC_abs
6, // op_ROR_abs
5, // op_BBR6_65c02
2, // op_BVS 70
5, // op_ADC_ind_y
5, // op_ADC_ind_zpage
7, // op_UNK_65c02
4, // op_STZ_zpage_x
4, // op_ADC_zpage_x
6, // op_ROR_zpage_x
5, // op_RMB7_65c02
2, // op_SEI 78
4, // op_ADC_abs_y
4, // op_PLY
7, // op_UNK_65c02
6, // op_JMP_abs_ind_x
4, // op_ADC_abs_x
6, // op_ROR_abs_x
5, // op_BBR7_65c02
2, // op_BRA 80
6, // op_STA_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_STY_zpage
3, // op_STA_zpage
3, // op_STX_zpage
5, // op_SMB0_65c02
2, // op_DEY 88
2, // op_BIT_imm
2, // op_TXA
7, // op_UNK_65c02
4, // op_STY_abs
4, // op_STA_abs
4, // op_STX_abs
5, // op_BBS0_65c02
2, // op_BCC 90
6, // op_STA_ind_y
5, // op_STA_ind_zpage
7, // op_UNK_65c02
4, // op_STY_zpage_x
4, // op_STA_zpage_x
4, // op_STX_zpage_y
5, // op_SMB1_65c02
2, // op_TYA 98
5, // op_STA_abs_y
2, // op_TXS
7, // op_UNK_65c02
4, // op_STZ_abs
5, // op_STA_abs_x
5, // op_STZ_abs_x
5, // op_BBS1_65c02
2, // op_LDY_imm A0
6, // op_LDA_ind_x
2, // op_LDX_imm
7, // op_UNK_65c02
3, // op_LDY_zpage
3, // op_LDA_zpage
3, // op_LDX_zpage
5, // op_SMB2_65c02
2, // op_TAY A8
2, // op_LDA_imm
2, // op_TAX
7, // op_UNK_65c02
4, // op_LDY_abs
4, // op_LDA_abs
4, // op_LDX_abs
5, // op_BBS2_65c02
2, // op_BCS B0
5, // op_LDA_ind_y
5, // op_LDA_ind_zpage
7, // op_UNK_65c02
4, // op_LDY_zpage_x
4, // op_LDA_zpage_x
4, // op_LDX_zpage_y
5, // op_SMB3_65c02
2, // op_CLV B8
4, // op_LDA_abs_y
2, // op_TSX
7, // op_UNK_65c02
4, // op_LDY_abs_x
4, // op_LDA_abs_x
4, // op_LDX_abs_y
5, // op_BBS3_65c02
2, // op_CPY_imm C0
6, // op_CMP_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_CPY_zpage
3, // op_CMP_zpage
5, // op_DEC_zpage
5, // op_SMB4_65c02
2, // op_INY C8
2, // op_CMP_imm
2, // op_DEX
7, // op_WAI_65c02
4, // op_CPY_abs
4, // op_CMP_abs
6, // op_DEC_abs
5, // op_BBS4_65c02
2, // op_BNE D0
5, // op_CMP_ind_y
5, // op_CMP_ind_zpage
7, // op_UNK_65c02
7, // op_UNK_65c02
4, // op_CMP_zpage_x
6, // op_DEC_zpage_x
5, // op_SMB5_65c02
2, // op_CLD D8
4, // op_CMP_abs_y
3, // op_PHX
7, // op_STP_65c02
7, // op_UNK_65c02
4, // op_CMP_abs_x
6, // op_DEC_abs_x
5, // op_BBS5_65c02
2, // op_CPX_imm E0
6, // op_SBC_ind_x
7, // op_UNK_65c02
7, // op_UNK_65c02
3, // op_CPX_zpage
3, // op_SBC_zpage
5, // op_INC_zpage
5, // op_SMB6_65c02
2, // op_INX E8
2, // op_SBC_imm
2, // op_NOP
7, // op_UNK_65c02
4, // op_CPX_abs
4, // op_SBC_abs
6, // op_INC_abs
5, // op_BBS6_65c02
2, // op_BEQ F0
5, // op_SBC_ind_y
5, // op_SBC_ind_zpage
7, // op_UNK_65c02
7, // op_UNK_65c02
4, // op_SBC_zpage_x
6, // op_INC_zpage_x
5, // op_SMB7_65c02
2, // op_SED F8
4, // op_SBC_abs_y
4, // op_PLX
7, // op_UNK_65c02
7, // op_UNK_65c02
4, // op_SBC_abs_x
6, // op_INC_abs_x
5 // op_BBS7_65c02
};
// NOTE: currently this is a conversion table between i386 flags <-> 6502 P register
static void init_flags_conversion_tables(void) {
for (unsigned i = 0; i < 256; i++) {
unsigned char val = 0;
if (i & C_Flag) {
val |= C_Flag_6502;
}
if (i & X_Flag) {
val |= X_Flag_6502;
}
if (i & I_Flag) {
val |= I_Flag_6502;
}
if (i & V_Flag) {
val |= V_Flag_6502;
}
if (i & B_Flag) {
val |= B_Flag_6502;
}
if (i & D_Flag) {
val |= D_Flag_6502;
}
if (i & Z_Flag) {
val |= Z_Flag_6502;
}
if (i & N_Flag) {
val |= N_Flag_6502;
}
cpu65_flags_encode[ i ] = val;
cpu65_flags_decode[ val ] = i;
}
}
void cpu65_init(void)
{
init_flags_conversion_tables();
cpu65__signal = 0;
cpu65_pc = 0x0;
cpu65_ea = 0x0;
cpu65_a = 0xFF;
cpu65_x = 0xFF;
cpu65_y = 0xFF;
cpu65_f = (C_Flag_6502|X_Flag_6502|I_Flag_6502|V_Flag_6502|B_Flag_6502|Z_Flag_6502|N_Flag_6502);
cpu65_sp = 0xFC;
}
void cpu65_interrupt(int reason)
{
pthread_mutex_lock(&irq_mutex);
cpu65__signal |= reason;
pthread_mutex_unlock(&irq_mutex);
}
void cpu65_uninterrupt(int reason)
{
pthread_mutex_lock(&irq_mutex);
cpu65__signal &= ~reason;
pthread_mutex_unlock(&irq_mutex);
}
void cpu65_reboot(void) {
timing_initialize();
video_reset();
joy_button0 = 0xff; // OpenApple
cpu65_interrupt(ResetSig);
}
#if CPU_TRACING
/* -------------------------------------------------------------------------
CPU Tracing routines
------------------------------------------------------------------------- */
void cpu65_trace_begin(const char *trace_file) {
if (trace_file) {
cpu_trace_fp = fopen(trace_file, "w");
}
}
void cpu65_trace_end(void) {
if (cpu_trace_fp) {
fflush(cpu_trace_fp);
fclose(cpu_trace_fp);
cpu_trace_fp = NULL;
}
}
void cpu65_trace_toggle(const char *trace_file) {
if (cpu_trace_fp) {
cpu65_trace_end();
} else {
cpu65_trace_begin(trace_file);
}
}
GLUE_C_WRITE(cpu65_trace_prologue)
{
nargs = 0;
current_pc = cpu65_pc;
}
GLUE_C_WRITE(cpu65_trace_arg)
{
assert(nargs <= 2);
opargs[nargs++] = b;
}
GLUE_C_WRITE(cpu65_trace_arg1)
{
assert(nargs <= 2);
opargs[2] = b;
++nargs;
}
GLUE_C_WRITE(cpu65_trace_arg2)
{
assert(nargs <= 2);
opargs[1] = b;
++nargs;
}
GLUE_C_WRITE(cpu65_trace_epilogue)
{
int8_t arg1 = opargs[1];
int8_t arg2 = opargs[2];
if (!cpu_trace_fp) {
return;
}
assert(nargs > 0);
assert(nargs <= 3);
if (nargs != opcodes_65c02_numargs[cpu65_opcode]+1) {
assert(false && "OOPS, most likely some cpu.S routine is not properly setting the arg value");
}
switch (opcodes_65c02[cpu65_opcode].mode) {
case addr_implied:
case addr_accumulator:
fprintf(cpu_trace_fp, "%04X:%02X ", current_pc, cpu65_opcode);
break;
case addr_immediate:
case addr_zeropage:
case addr_zeropage_x:
case addr_zeropage_y:
case addr_indirect:
case addr_indirect_x:
case addr_indirect_y:
case addr_relative:
fprintf(cpu_trace_fp, "%04X:%02X%02X ", current_pc, cpu65_opcode, (uint8_t)arg1);
break;
case addr_absolute:
case addr_absolute_x:
case addr_absolute_y:
case addr_j_indirect:
case addr_j_indirect_x:
fprintf(cpu_trace_fp, "%04X:%02X%02X%02X", current_pc, cpu65_opcode, (uint8_t)arg2, (uint8_t)arg1);
break;
default:
fprintf(cpu_trace_fp, "invalid opcode mode");
break;
}
fprintf(cpu_trace_fp, " SP:%02X X:%02X Y:%02X A:%02X", cpu65_sp, cpu65_x, cpu65_y, cpu65_a);
#define FLAGS_BUFSZ 9
char flags_buf[FLAGS_BUFSZ];
memset(flags_buf, '-', FLAGS_BUFSZ);
if (cpu65_f & C_Flag_6502) {
flags_buf[0]='C';
}
if (cpu65_f & X_Flag_6502) {
flags_buf[1]='X';
}
if (cpu65_f & I_Flag_6502) {
flags_buf[2]='I';
}
if (cpu65_f & V_Flag_6502) {
flags_buf[3]='V';
}
if (cpu65_f & B_Flag_6502) {
flags_buf[4]='B';
}
if (cpu65_f & D_Flag_6502) {
flags_buf[5]='D';
}
if (cpu65_f & Z_Flag_6502) {
flags_buf[6]='Z';
}
if (cpu65_f & N_Flag_6502) {
flags_buf[7]='N';
}
flags_buf[8] = '\0';
fprintf(cpu_trace_fp, " %s CYC:%u EA:%04X", flags_buf, cpu65_opcycles, cpu65_ea);
char fmt[64];
sprintf(fmt, " %s %s", opcodes_65c02[cpu65_opcode].mnemonic, disasm_templates[opcodes_65c02[cpu65_opcode].mode]);
switch (opcodes_65c02[cpu65_opcode].mode) {
case addr_implied:
case addr_accumulator:
fprintf(cpu_trace_fp, "%s", fmt);
break;
case addr_immediate:
case addr_zeropage:
case addr_zeropage_x:
case addr_zeropage_y:
case addr_indirect:
case addr_indirect_x:
case addr_indirect_y:
fprintf(cpu_trace_fp, fmt, (uint8_t)arg1);
break;
case addr_absolute:
case addr_absolute_x:
case addr_absolute_y:
case addr_j_indirect:
case addr_j_indirect_x:
fprintf(cpu_trace_fp, fmt, (uint8_t)arg1, (uint8_t)arg2);
break;
case addr_relative:
if (arg1 < 0) {
fprintf(cpu_trace_fp, fmt, current_pc + arg1 + 2, '-', (uint8_t)(-arg1));
} else {
fprintf(cpu_trace_fp, fmt, current_pc + arg1 + 2, '+', (uint8_t)arg1);
}
break;
default:
break;
}
fprintf(cpu_trace_fp, "%s", "\n");
fflush(cpu_trace_fp);
}
void cpu65_trace_checkpoint(void) {
if (cpu_trace_fp) {
fprintf(cpu_trace_fp, "---TOTAL CYC:%lu\n",cycles_count_total);
fflush(cpu_trace_fp);
}
}
# if RESET_VM_TRACING
# define VM_TRACING 1
# endif
# undef RESET_VM_TRACING
#endif // CPU_TRACING
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