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emulator.c
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emulator.c
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#include <assert.h>
#include <ctype.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "clem_types.h"
#include "emulator.h"
#include "clem_code.h"
#include "clem_debug.h"
#include "clem_util.h"
#define ANSI_COLOR_RED "\x1b[31m"
#define ANSI_COLOR_GREEN "\x1b[32m"
#define ANSI_COLOR_YELLOW "\x1b[33m"
#define ANSI_COLOR_BLUE "\x1b[34m"
#define ANSI_COLOR_MAGENTA "\x1b[35m"
#define ANSI_COLOR_CYAN "\x1b[36m"
#define ANSI_COLOR_RESET "\x1b[0m"
static uint8_t s_empty_ram[CLEM_IIGS_BANK_SIZE];
static struct ClemensOpcodeDesc sOpcodeDescriptions[256];
/*
* The Clemens Emulator
* =====================
* The Emulation Layer facilities practical I/O between a host application and
* the "internals" of the machine (CPU, FPI, MEGA2, I/O state.)
*
* "Practical I/O" comes from and is accessed by the 'Host' application. Input
* includes keyboard, mouse and gamepad events, disk images. Output includes
* video, speaker and other devices (TBD.) The emulator provides the
* controlling components for this I/O.
*
*
* Emulation
* ---------
* There are three major components executed in the emulation loop: the CPU,
* FPI and MEGA2. Wrapping these components is a 'bus controller' plus RAM and
* ROM units.
*
* The MEGA2, following the IIgs firmware/hardware references acts as a
* 'frontend' for the machine's I/O. Since Apple II uses memory mapped I/O to
* control devices, this mostly abstracts the I/O layer from the emulation
* loop.
*
* The loop performs the following:
* - execute CPU for a time slice until
* - a set number of clocks passes
* - a memory access occurs
* - ???
* - interrupts are checked per time-slice,
* - if triggered, set the CPU state accordingly
* - ???
*
* References
* ----------
* Numerous
* For the 65816, the WDC documentation and cycle counts from
* http://www.brutaldeluxe.fr/documentation/cortland/v7%2065SC816%20opcodes%20Cycle%20by%20cycle%20listing.pdf
* which were instrumental to handling the various timing quirks
*/
#define CLEM_I_PRINT_STATS(_clem_) \
do { \
struct Clemens65C816 *_cpu_ = &(_clem_)->cpu; \
uint8_t _P_ = _cpu_->regs.P; \
if (_cpu_->pins.emulation) { \
printf(ANSI_COLOR_GREEN "Clocks.... Cycles...." ANSI_COLOR_RESET \
" NV_BDIZC PC=%04X, PBR=%02X, DBR=%02X, S=%04X, D=%04X, " \
"B=%02X A=%02X, X=%02X, Y=%02X\n", \
_cpu_->regs.PC, _cpu_->regs.PBR, _cpu_->regs.DBR, _cpu_->regs.S, _cpu_->regs.D, \
(_cpu_->regs.A & 0xff00) >> 8, _cpu_->regs.A & 0x00ff, _cpu_->regs.X & 0x00ff, \
_cpu_->regs.Y & 0x00ff); \
printf(ANSI_COLOR_GREEN "%10.2f %10u" ANSI_COLOR_RESET " %c%c%c%c%c%c%c%c\n", \
(_clem_)->clocks_spent / (float)(_clem_)->clocks_step, (_cpu_)->cycles_spent, \
(_P_ & kClemensCPUStatus_Negative) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Overflow) ? '1' : '0', '-', '-', \
(_P_ & kClemensCPUStatus_Decimal) ? '1' : '0', \
(_P_ & kClemensCPUStatus_IRQDisable) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Zero) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Carry) ? '1' : '0'); \
} else { \
printf(ANSI_COLOR_GREEN "Clocks.... Cycles...." ANSI_COLOR_RESET \
" NVMXDIZC PC=%04X, PBR=%02X, DBR=%02X, S=%04X, D=%04X, " \
"A=%04X, X=%04X, Y=%04X\n", \
_cpu_->regs.PC, _cpu_->regs.PBR, _cpu_->regs.DBR, _cpu_->regs.S, _cpu_->regs.D, \
_cpu_->regs.A, _cpu_->regs.X, _cpu_->regs.Y); \
printf(ANSI_COLOR_GREEN "%10.2f %10u" ANSI_COLOR_RESET " %c%c%c%c%c%c%c%c\n", \
(_clem_)->clocks_spent / (float)(_clem_)->clocks_step, (_cpu_)->cycles_spent, \
(_P_ & kClemensCPUStatus_Negative) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Overflow) ? '1' : '0', \
(_P_ & kClemensCPUStatus_MemoryAccumulator) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Index) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Decimal) ? '1' : '0', \
(_P_ & kClemensCPUStatus_IRQDisable) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Zero) ? '1' : '0', \
(_P_ & kClemensCPUStatus_Carry) ? '1' : '0'); \
} \
} while (0)
#if CLEM_COMPILE_DEFINE_JMP_LOGGING
#define CLEM_CPU_I_JSR_LOG(_clem_cpu_, _adr_) \
do { \
fprintf(stderr, "%02X:%04X: JSR $%04X\n", (_clem_cpu_)->regs.PBR, (_clem_cpu_)->regs.PC, \
_adr_); \
fflush(stderr); \
} while (0)
#define CLEM_CPU_I_JSL_LOG(_clem_cpu_, _adr_, _bank_) \
do { \
fprintf(stderr, "%02X:%04X: JSL $%02X%04X\n", (_clem_cpu_)->regs.PBR, \
(_clem_cpu_)->regs.PC, _bank_, _adr_); \
fflush(stderr); \
} while (0)
#define CLEM_CPU_I_RTS_LOG(_clem_cpu_, _adr_) \
do { \
fprintf(stderr, "%02X:%04X: RTS (%04X)\n", (_clem_cpu_)->regs.PBR, (_clem_cpu_)->regs.PC, \
_adr_); \
fflush(stderr); \
} while (0)
#define CLEM_CPU_I_RTL_LOG(_clem_cpu_, _adr_, _bank_) \
do { \
fprintf(stderr, "%02X:%04X: RTL (%02X%04X)\n", (_clem_cpu_)->regs.PBR, \
(_clem_cpu_)->regs.PC, _bank_, _adr_); \
fflush(stderr); \
} while (0)
#define CLEM_CPU_I_INTR_LOG(_clem_cpu_, _name_) \
do { \
fprintf(stderr, "%02X:%04X: INTR %s\n", (_clem_cpu_)->regs.PBR, (_clem_cpu_)->regs.PC, \
_name_); \
fflush(stderr); \
} while (0)
#define CLEM_CPU_I_RTI_LOG(_clem_cpu_, _adr_, _bank_) \
do { \
if ((_clem_cpu_)->pins.emulation) { \
fprintf(stderr, "%02X:%04X: RTI (%04X)\n", (_clem_cpu_)->regs.PBR, \
(_clem_cpu_)->regs.PC, _adr_); \
} else { \
fprintf(stderr, "%02X:%04X: RTI (%02X%04X)\n", (_clem_cpu_)->regs.PBR, \
(_clem_cpu_)->regs.PC, _bank_, _adr_); \
} \
fflush(stderr); \
} while (0)
#else
#define CLEM_CPU_I_JSR_LOG(_clem_cpu_, _adr_)
#define CLEM_CPU_I_JSL_LOG(_clem_cpu_, _adr_, _bank_)
#define CLEM_CPU_I_RTS_LOG(_clem_cpu_, _adr_)
#define CLEM_CPU_I_RTL_LOG(_clem_cpu_, _adr_, _bank_)
#define CLEM_CPU_I_INTR_LOG(_clem_cpu_, _name_)
#define CLEM_CPU_I_RTI_LOG(_clem_cpu_, _adr_, _bank_)
#endif
static inline void _opcode_instruction_define_mvn(struct ClemensInstruction *instr, uint8_t opcode,
uint8_t dest, uint8_t src) {
instr->desc = &sOpcodeDescriptions[opcode];
instr->opc_8 = false;
instr->value = src;
instr->bank = dest;
}
static inline void _opcode_instruction_define(struct ClemensInstruction *instr, uint8_t opcode,
uint16_t value, bool opc_8) {
instr->desc = &sOpcodeDescriptions[opcode];
instr->bank = 0x00;
instr->opc_8 = opc_8;
instr->value = value;
}
static inline void _opcode_instruction_define_simple(struct ClemensInstruction *instr,
uint8_t opcode) {
instr->desc = &sOpcodeDescriptions[opcode];
instr->opc = opcode;
instr->bank = 0x00;
instr->opc_8 = false;
instr->value = 0x0000;
}
static inline void _opcode_instruction_define_long(struct ClemensInstruction *instr, uint8_t opcode,
uint8_t bank, uint16_t addr) {
instr->desc = &sOpcodeDescriptions[opcode];
instr->bank = bank;
instr->opc_8 = false;
instr->value = addr;
}
static inline void _opcode_instruction_define_dp(struct ClemensInstruction *instr, uint8_t opcode,
uint8_t offset) {
instr->desc = &sOpcodeDescriptions[opcode];
instr->bank = 0x00;
instr->opc_8 = false;
instr->value = offset;
}
static void _opcode_description(uint8_t opcode, const char *name,
enum ClemensCPUAddrMode addr_mode) {
strncpy(sOpcodeDescriptions[opcode].name, name, 3);
sOpcodeDescriptions[opcode].name[3] = '\0';
sOpcodeDescriptions[opcode].addr_mode = addr_mode;
}
static void _opcode_print(ClemensMachine *clem, struct ClemensInstruction *inst) {
char operand[16];
operand[0] = '\0';
switch (inst->desc->addr_mode) {
case kClemensCPUAddrMode_None:
case kClemensCPUAddrMode_Count:
break;
case kClemensCPUAddrMode_Immediate:
if (inst->opc_8) {
snprintf(operand, sizeof(operand), "#$%02X", (uint8_t)inst->value);
} else {
snprintf(operand, sizeof(operand), "#$%04X", inst->value);
}
break;
case kClemensCPUAddrMode_Absolute:
snprintf(operand, sizeof(operand), "$%04X", inst->value);
break;
case kClemensCPUAddrMode_AbsoluteLong:
snprintf(operand, sizeof(operand), "$%02X%04X", inst->bank, inst->value);
break;
case kClemensCPUAddrMode_Absolute_X:
snprintf(operand, sizeof(operand), "$%04X, X", inst->value);
break;
case kClemensCPUAddrMode_Absolute_Y:
snprintf(operand, sizeof(operand), "$%04X, Y", inst->value);
break;
case kClemensCPUAddrMode_AbsoluteLong_X:
snprintf(operand, sizeof(operand), "$%02X%04X, X", inst->bank, inst->value);
break;
case kClemensCPUAddrMode_DirectPage:
snprintf(operand, sizeof(operand), "$%02X", inst->value);
break;
case kClemensCPUAddrMode_DirectPage_X:
snprintf(operand, sizeof(operand), "$%02X, X", inst->value);
break;
case kClemensCPUAddrMode_DirectPage_Y:
snprintf(operand, sizeof(operand), "$%02X, Y", inst->value);
break;
case kClemensCPUAddrMode_DirectPageIndirect:
snprintf(operand, sizeof(operand), "($%02X)", inst->value);
break;
case kClemensCPUAddrMode_DirectPageIndirectLong:
snprintf(operand, sizeof(operand), "[$%02X]", inst->value);
break;
case kClemensCPUAddrMode_DirectPage_X_Indirect:
snprintf(operand, sizeof(operand), "($%02X, X)", inst->value);
break;
case kClemensCPUAddrMode_DirectPage_Indirect_Y:
snprintf(operand, sizeof(operand), "($%02X), Y", inst->value);
break;
case kClemensCPUAddrMode_DirectPage_IndirectLong_Y:
snprintf(operand, sizeof(operand), "[$%02X], Y", inst->value);
break;
case kClemensCPUAddrMode_PCRelative:
snprintf(operand, sizeof(operand), "$%02X (%d)", inst->value, (int8_t)inst->value);
break;
case kClemensCPUAddrMode_PCRelativeLong:
snprintf(operand, sizeof(operand), "$%04X (%d)", inst->value, (int16_t)inst->value);
break;
case kClemensCPUAddrMode_PC:
snprintf(operand, sizeof(operand), "$%04X", inst->value);
break;
case kClemensCPUAddrMode_PCIndirect:
snprintf(operand, sizeof(operand), "($%04X)", inst->value);
break;
case kClemensCPUAddrMode_PCIndirect_X:
snprintf(operand, sizeof(operand), "($%04X, X)", inst->value);
break;
case kClemensCPUAddrMode_PCLong:
snprintf(operand, sizeof(operand), "$%02X%04X", inst->bank, inst->value);
break;
case kClemensCPUAddrMode_PCLongIndirect:
snprintf(operand, sizeof(operand), "[$%04X]", inst->value);
break;
case kClemensCPUAddrMode_Operand:
snprintf(operand, sizeof(operand), "%02X", inst->value);
break;
case kClemensCPUAddrMode_Stack_Relative:
snprintf(operand, sizeof(operand), "%02X, S", inst->value);
break;
case kClemensCPUAddrMode_Stack_Relative_Indirect_Y:
snprintf(operand, sizeof(operand), "(%02X, S), Y", inst->value);
break;
case kClemensCPUAddrMode_MoveBlock:
snprintf(operand, sizeof(operand), "s:%02X, d:%02X", inst->value & 0xff, inst->bank);
break;
}
if (clem->debug_flags & kClemensDebugFlag_StdoutOpcode) {
printf(ANSI_COLOR_BLUE "%02X:%04X " ANSI_COLOR_CYAN "%s" ANSI_COLOR_YELLOW
" %s" ANSI_COLOR_RESET "\n",
inst->pbr, inst->addr, inst->desc->name, operand);
}
if (clem->debug_flags & kClemensDebugFlag_DebugLogOpcode) {
char *debug_text = clem_debug_acquire_trace(32);
int debug_len = snprintf(debug_text, 32, "%2u %02X:%04X %s %s", inst->cycles_spent,
inst->pbr, inst->addr, inst->desc->name, operand);
memset(debug_text + debug_len, 0x20, 32 - debug_len);
debug_text[31] = '\n';
}
if ((clem->debug_flags & kClemensDebugFlag_OpcodeCallback) && clem->opcode_post) {
(*clem->opcode_post)(inst, operand, clem->debug_user_ptr);
}
}
void _clem_debug_memory_dump(ClemensMachine *clem, uint8_t mem_page, uint8_t mem_bank,
uint8_t page_count) {
char filename[64];
snprintf(filename, sizeof(filename), "mem_%02x_%04x_%u.bin", (uint16_t)mem_page << 8, mem_bank,
page_count);
filename[63] = '\0';
FILE *fp = fopen(filename, "wb");
if (fp) {
uint16_t mem_addr = (uint16_t)mem_page << 8;
while (page_count > 0) {
uint8_t mem_next_bank = mem_bank;
bool mega2 = false;
fwrite(_clem_get_memory_bank(clem, mem_bank, &mega2) + mem_addr, 256, 1, fp);
if (mem_addr + 0x0100 < mem_addr) {
_clem_next_dbr(clem, &mem_next_bank, mem_bank);
}
mem_addr += 0x0100;
mem_bank = mem_next_bank;
--page_count;
}
fclose(fp);
} else {
CLEM_WARN("Failed to dump memory %s", filename);
}
}
void _clem_init_instruction_map() {
_opcode_description(CLEM_OPC_ADC_IMM, "ADC", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_ADC_ABS, "ADC", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_ADC_ABSL, "ADC", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_ADC_DP, "ADC", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_ADC_DP_INDIRECT, "ADC", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_ADC_DP_INDIRECTL, "ADC",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_ADC_ABS_IDX, "ADC", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_ADC_ABSL_IDX, "ADC", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_ADC_ABS_IDY, "ADC", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_ADC_DP_IDX, "ADC", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_ADC_DP_IDX_INDIRECT, "ADC",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_ADC_DP_INDIRECT_IDY, "ADC",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_ADC_DP_INDIRECTL_IDY, "ADC",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_ADC_STACK_REL, "ADC", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_ADC_STACK_REL_INDIRECT_IDY, "ADC",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_AND_IMM, "AND", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_AND_ABS, "AND", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_AND_ABSL, "AND", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_AND_DP, "AND", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_AND_DP_INDIRECT, "AND", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_AND_DP_INDIRECTL, "AND",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_AND_ABS_IDX, "AND", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_AND_ABSL_IDX, "AND", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_AND_ABS_IDY, "AND", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_AND_DP_IDX, "AND", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_AND_DP_IDX_INDIRECT, "AND",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_AND_DP_INDIRECT_IDY, "AND",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_AND_DP_INDIRECTL_IDY, "AND",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_AND_STACK_REL, "AND", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_AND_STACK_REL_INDIRECT_IDY, "AND",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_ASL_A, "ASL", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_ASL_ABS, "ASL", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_ASL_DP, "ASL", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_ASL_ABS_IDX, "ASL", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_ASL_ABS_DP_IDX, "ASL", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_BCC, "BCC", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BCS, "BCS", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BEQ, "BEQ", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BIT_IMM, "BIT", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_BIT_ABS, "BIT", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_BIT_DP, "BIT", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_BIT_ABS_IDX, "BIT", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_BIT_DP_IDX, "BIT", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_BMI, "BMI", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BNE, "BNE", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BPL, "BPL", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BRA, "BRA", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BRL, "BRL", kClemensCPUAddrMode_PCRelativeLong);
_opcode_description(CLEM_OPC_BVC, "BVC", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BVS, "BVS", kClemensCPUAddrMode_PCRelative);
_opcode_description(CLEM_OPC_BRK, "BRK", kClemensCPUAddrMode_Operand);
_opcode_description(CLEM_OPC_CLC, "CLC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_CLD, "CLD", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_CLI, "CLI", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_CLV, "CLV", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_CMP_IMM, "CMP", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_CMP_ABS, "CMP", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_CMP_ABSL, "CMP", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_CMP_DP, "CMP", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_CMP_DP_INDIRECT, "CMP", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_CMP_DP_INDIRECTL, "CMP",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_CMP_ABS_IDX, "CMP", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_CMP_ABSL_IDX, "CMP", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_CMP_ABS_IDY, "CMP", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_CMP_DP_IDX, "CMP", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_CMP_DP_IDX_INDIRECT, "CMP",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_CMP_DP_INDIRECT_IDY, "CMP",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_CMP_DP_INDIRECTL_IDY, "CMP",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_CMP_STACK_REL, "CMP", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_CMP_STACK_REL_INDIRECT_IDY, "CMP",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_COP, "COP", kClemensCPUAddrMode_Operand);
_opcode_description(CLEM_OPC_CPX_IMM, "CPX", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_CPX_ABS, "CPX", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_CPX_DP, "CPX", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_CPY_IMM, "CPY", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_CPY_ABS, "CPY", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_CPY_DP, "CPY", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_DEC_A, "DEC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_DEC_ABS, "DEC", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_DEC_DP, "DEC", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_DEC_ABS_IDX, "DEC", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_DEC_ABS_DP_IDX, "DEC", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_DEX, "DEX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_DEY, "DEY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_EOR_IMM, "EOR", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_EOR_ABS, "EOR", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_EOR_ABSL, "EOR", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_EOR_DP, "EOR", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_EOR_DP_INDIRECT, "EOR", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_EOR_DP_INDIRECTL, "EOR",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_EOR_ABS_IDX, "EOR", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_EOR_ABSL_IDX, "EOR", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_EOR_ABS_IDY, "EOR", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_EOR_DP_IDX, "EOR", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_EOR_DP_IDX_INDIRECT, "EOR",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_EOR_DP_INDIRECT_IDY, "EOR",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_EOR_DP_INDIRECTL_IDY, "EOR",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_EOR_STACK_REL, "EOR", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_EOR_STACK_REL_INDIRECT_IDY, "EOR",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_INC_A, "INC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_INC_ABS, "INC", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_INC_DP, "INC", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_INC_ABS_IDX, "INC", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_INC_ABS_DP_IDX, "INC", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_INX, "INX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_INY, "INY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_JMP_ABS, "JMP", kClemensCPUAddrMode_PC);
_opcode_description(CLEM_OPC_JMP_INDIRECT, "JMP", kClemensCPUAddrMode_PCIndirect);
_opcode_description(CLEM_OPC_JMP_INDIRECT_IDX, "JMP", kClemensCPUAddrMode_PCIndirect_X);
_opcode_description(CLEM_OPC_JMP_ABSL, "JML", kClemensCPUAddrMode_PCLong);
_opcode_description(CLEM_OPC_JMP_ABSL_INDIRECT, "JML", kClemensCPUAddrMode_PCLongIndirect);
_opcode_description(CLEM_OPC_JSL, "JSL", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_JSR, "JSR", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_JSR_INDIRECT_IDX, "JSR", kClemensCPUAddrMode_PCIndirect_X);
_opcode_description(CLEM_OPC_LDA_IMM, "LDA", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_LDA_ABS, "LDA", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_LDA_ABSL, "LDA", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_LDA_DP, "LDA", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_LDA_DP_INDIRECT, "LDA", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_LDA_DP_INDIRECTL, "LDA",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_LDA_ABS_IDX, "LDA", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_LDA_ABSL_IDX, "LDA", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_LDA_ABS_IDY, "LDA", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_LDA_DP_IDX, "LDA", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_LDA_DP_IDX_INDIRECT, "LDA",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_LDA_DP_INDIRECT_IDY, "LDA",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_LDA_DP_INDIRECTL_IDY, "LDA",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_LDA_STACK_REL, "LDA", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_LDA_STACK_REL_INDIRECT_IDY, "LDA",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_LDX_IMM, "LDX", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_LDX_ABS, "LDX", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_LDX_DP, "LDX", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_LDX_ABS_IDY, "LDX", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_LDX_DP_IDY, "LDX", kClemensCPUAddrMode_DirectPage_Y);
_opcode_description(CLEM_OPC_LDY_IMM, "LDY", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_LDY_ABS, "LDY", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_LDY_DP, "LDY", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_LDY_ABS_IDX, "LDY", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_LDY_DP_IDX, "LDY", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_LSR_A, "LSR", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_LSR_ABS, "LSR", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_LSR_DP, "LSR", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_LSR_ABS_IDX, "LSR", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_LSR_ABS_DP_IDX, "LSR", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_MVN, "MVN", kClemensCPUAddrMode_MoveBlock);
_opcode_description(CLEM_OPC_MVP, "MVP", kClemensCPUAddrMode_MoveBlock);
_opcode_description(CLEM_OPC_NOP, "NOP", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_ORA_IMM, "ORA", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_ORA_ABS, "ORA", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_ORA_ABSL, "ORA", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_ORA_DP, "ORA", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_ORA_DP_INDIRECT, "ORA", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_ORA_DP_INDIRECTL, "ORA",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_ORA_ABS_IDX, "ORA", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_ORA_ABSL_IDX, "ORA", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_ORA_ABS_IDY, "ORA", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_ORA_DP_IDX, "ORA", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_ORA_DP_IDX_INDIRECT, "ORA",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_ORA_DP_INDIRECT_IDY, "ORA",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_ORA_DP_INDIRECTL_IDY, "ORA",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_ORA_STACK_REL, "ORA", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_ORA_STACK_REL_INDIRECT_IDY, "ORA",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_PEA_ABS, "PEA", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_PEI_DP_INDIRECT, "PEI", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_PER, "PER", kClemensCPUAddrMode_PCRelativeLong);
_opcode_description(CLEM_OPC_PHA, "PHA", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHB, "PHB", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHD, "PHD", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHK, "PHK", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHP, "PHP", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHX, "PHX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PHY, "PHY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLA, "PLA", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLB, "PLB", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLD, "PLD", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLP, "PLP", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLX, "PLX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_PLY, "PLY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_REP, "REP", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_ROL_A, "ROL", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_ROL_ABS, "ROL", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_ROL_DP, "ROL", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_ROL_ABS_IDX, "ROL", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_ROL_ABS_DP_IDX, "ROL", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_ROR_A, "ROR", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_ROR_ABS, "ROR", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_ROR_DP, "ROR", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_ROR_ABS_IDX, "ROR", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_ROR_ABS_DP_IDX, "ROR", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_RTI, "RTI", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_RTL, "RTL", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_RTS, "RTS", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_SBC_IMM, "SBC", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_SBC_ABS, "SBC", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_SBC_ABSL, "SBC", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_SBC_DP, "SBC", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_SBC_DP_INDIRECT, "SBC", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_SBC_DP_INDIRECTL, "SBC",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_SBC_ABS_IDX, "SBC", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_SBC_ABSL_IDX, "SBC", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_SBC_ABS_IDY, "SBC", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_SBC_DP_IDX, "SBC", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_SBC_DP_IDX_INDIRECT, "SBC",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_SBC_DP_INDIRECT_IDY, "SBC",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_SBC_DP_INDIRECTL_IDY, "SBC",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_SBC_STACK_REL, "SBC", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_SBC_STACK_REL_INDIRECT_IDY, "SBC",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_SEC, "SEC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_SED, "SED", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_SEI, "SEI", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_SEP, "SEP", kClemensCPUAddrMode_Immediate);
_opcode_description(CLEM_OPC_STA_ABS, "STA", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_STA_ABSL, "STA", kClemensCPUAddrMode_AbsoluteLong);
_opcode_description(CLEM_OPC_STA_DP, "STA", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_STA_DP_INDIRECT, "STA", kClemensCPUAddrMode_DirectPageIndirect);
_opcode_description(CLEM_OPC_STA_DP_INDIRECTL, "STA",
kClemensCPUAddrMode_DirectPageIndirectLong);
_opcode_description(CLEM_OPC_STA_ABS_IDX, "STA", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_STA_ABSL_IDX, "STA", kClemensCPUAddrMode_AbsoluteLong_X);
_opcode_description(CLEM_OPC_STA_ABS_IDY, "STA", kClemensCPUAddrMode_Absolute_Y);
_opcode_description(CLEM_OPC_STA_DP_IDX, "STA", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_STA_DP_IDX_INDIRECT, "STA",
kClemensCPUAddrMode_DirectPage_X_Indirect);
_opcode_description(CLEM_OPC_STA_DP_INDIRECT_IDY, "STA",
kClemensCPUAddrMode_DirectPage_Indirect_Y);
_opcode_description(CLEM_OPC_STA_DP_INDIRECTL_IDY, "STA",
kClemensCPUAddrMode_DirectPage_IndirectLong_Y);
_opcode_description(CLEM_OPC_STA_STACK_REL, "STA", kClemensCPUAddrMode_Stack_Relative);
_opcode_description(CLEM_OPC_STA_STACK_REL_INDIRECT_IDY, "STA",
kClemensCPUAddrMode_Stack_Relative_Indirect_Y);
_opcode_description(CLEM_OPC_STP, "STP", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_STX_ABS, "STX", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_STX_DP, "STX", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_STX_DP_IDY, "STX", kClemensCPUAddrMode_DirectPage_Y);
_opcode_description(CLEM_OPC_STY_ABS, "STY", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_STY_DP, "STY", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_STY_DP_IDX, "STY", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_STZ_ABS, "STZ", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_STZ_DP, "STZ", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_STZ_ABS_IDX, "STZ", kClemensCPUAddrMode_Absolute_X);
_opcode_description(CLEM_OPC_STZ_DP_IDX, "STZ", kClemensCPUAddrMode_DirectPage_X);
_opcode_description(CLEM_OPC_TRB_ABS, "TRB", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_TRB_DP, "TRB", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_TSB_ABS, "TSB", kClemensCPUAddrMode_Absolute);
_opcode_description(CLEM_OPC_TSB_DP, "TSB", kClemensCPUAddrMode_DirectPage);
_opcode_description(CLEM_OPC_TAX, "TAX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TAY, "TAY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TCD, "TCD", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TDC, "TDC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TCS, "TCS", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TSC, "TSC", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TSX, "TSX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TXA, "TXA", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TXS, "TXS", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TXY, "TXY", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TYA, "TYA", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_TYX, "TYX", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_WAI, "WAI", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_WDM, "WDM", kClemensCPUAddrMode_Operand);
_opcode_description(CLEM_OPC_XBA, "XBA", kClemensCPUAddrMode_None);
_opcode_description(CLEM_OPC_XCE, "XCE", kClemensCPUAddrMode_None);
}
bool clemens_is_initialized_simple(const ClemensMachine *machine) {
return (machine->mem.fpi_bank_map[0] != NULL);
}
bool clemens_is_initialized(const ClemensMachine *machine) {
if (!clemens_is_initialized_simple(machine)) {
return false;
}
if (!machine->mem.fpi_bank_map[1]) {
return false;
}
if (!machine->tspec.clocks_step) {
return false;
}
return true;
}
bool clemens_is_resetting(const ClemensMachine *clem) {
return (!clem->cpu.pins.resbIn) || clem->cpu.state_type == kClemensCPUStateType_Reset;
}
void clemens_host_setup(ClemensMachine *clem, LoggerFn logger, void *debug_user_ptr) {
clem->logger_fn = logger;
clem->debug_user_ptr = debug_user_ptr;
// TODO: remove this once the debug context singleton limitation is removed
// (see clem_debug.c)
clemens_debug_context(clem);
}
void clemens_opcode_callback(ClemensMachine *clem, ClemensOpcodeCallback callback) {
if (callback) {
clem->debug_flags |= kClemensDebugFlag_OpcodeCallback;
} else {
clem->debug_flags &= ~kClemensDebugFlag_OpcodeCallback;
}
clem->opcode_post = callback;
}
void clemens_create_page_mapping(struct ClemensMemoryPageInfo *page, uint8_t page_idx,
uint8_t bank_read_idx, uint8_t bank_write_idx) {
clem_mem_create_page_mapping(page, page_idx, bank_read_idx, bank_write_idx);
}
int clemens_init(ClemensMachine *machine, uint32_t speed_factor, uint32_t clocks_step, void *rom,
size_t romSize, void *e0bank, void *e1bank, void *fpiRAM,
unsigned int fpiRAMBankCount) {
unsigned idx;
clemens_simple_init(machine, speed_factor, clocks_step, fpiRAM, fpiRAMBankCount);
if (rom == NULL) {
return -1;
}
if (fpiRAMBankCount < 4 || fpiRAM == NULL || e0bank == NULL || e1bank == NULL) {
return -2;
}
/* memory organization for the FPI */
/* TODO: Support ROM 01 */
for (idx = 0xfc; idx <= 0xff; ++idx) {
machine->mem.fpi_bank_used[idx] = true;
machine->mem.fpi_bank_map[idx] = (uint8_t *)rom + CLEM_IIGS_BANK_SIZE * (idx - 0xfc);
}
/* TODO: remap non used banks to used banks per the wrapping mechanism on
the IIgs
*/
machine->mem.fpi_bank_map[CLEM_IIGS_EMPTY_RAM_BANK] = s_empty_ram;
machine->mem.mega2_bank_map[0x00] = (uint8_t *)e0bank;
memset(machine->mem.mega2_bank_map[0x00], 0, CLEM_IIGS_BANK_SIZE);
machine->mem.mega2_bank_map[0x01] = (uint8_t *)e1bank;
memset(machine->mem.mega2_bank_map[0x01], 0, CLEM_IIGS_BANK_SIZE);
return 0;
}
void clemens_simple_init(ClemensMachine *machine, uint32_t speed_factor, uint32_t clocks_step,
void *fpiRAM, unsigned int fpiRAMBankCount) {
machine->cpu.pins.resbIn = true;
machine->cpu.pins.irqbIn = true;
_clem_timespec_init(&machine->tspec, clocks_step);
if (fpiRAMBankCount > 256)
fpiRAMBankCount = 256;
for (unsigned i = 0; i < fpiRAMBankCount; ++i) {
machine->mem.fpi_bank_used[i] = true;
machine->mem.fpi_bank_map[i] = ((uint8_t *)fpiRAM) + (i * CLEM_IIGS_BANK_SIZE);
memset(machine->mem.fpi_bank_map[i], 0, CLEM_IIGS_BANK_SIZE);
}
/* all non mapped FPI banks will map to empty memory until overridden by
application or the full IIgs emulator initializtion function
(clemens_init)
*/
memset(s_empty_ram, 0, CLEM_IIGS_BANK_SIZE);
for (unsigned i = fpiRAMBankCount; i < 0xff; ++i) {
machine->mem.fpi_bank_used[i] = false;
machine->mem.fpi_bank_map[i] = s_empty_ram;
}
memset(&machine->mem.bank_page_map, 0, sizeof(machine->mem.bank_page_map));
/* internal tables used to define opcode attributes */
for (unsigned i = 0; i < 256; ++i) {
_opcode_description((uint8_t)i, "...", kClemensCPUAddrMode_None);
}
_clem_init_instruction_map();
}
void clemens_debug_context(ClemensMachine *clem) { clem_debug_context(clem); }
#define CLEM_LOAD_HEX_STATE_BEGIN '\0'
#define CLEM_LOAD_HEX_STATE_ERROR -1
#define CLEM_LOAD_HEX_STATE_CR '\r'
#define CLEM_LOAD_HEX_STATE_LENGTH ':'
#define CLEM_LOAD_HEX_STATE_ADR16 'a'
#define CLEM_LOAD_HEX_STATE_RECORD 'R'
#define CLEM_LOAD_HEX_STATE_DATA 'd'
#define CLEM_LOAD_HEX_STATE_CHKSUM '+'
#define CLEM_LOAD_HEX_STATE_EOL '.'
#define CLEM_LOAD_HEX_STATE_EOF '!'
#define CLEM_LOAD_HEX_RECORD_DATA 0x00
#define CLEM_LOAD_HEX_RECORD_EOF 0x01
#define CLEM_LOAD_HEX_RECORD_NONE 0xFF
bool clemens_load_hex(ClemensMachine *clem, const char *hex, const char *hex_end, unsigned bank) {
const char *line = hex;
const char *next = line;
unsigned token_len = 0;
char state = CLEM_LOAD_HEX_STATE_BEGIN;
uint8_t *clem_memory = NULL;
unsigned hex_byte_length = 0;
unsigned hex_address16 = 0;
unsigned hex_recordtype = CLEM_LOAD_HEX_RECORD_NONE;
unsigned tmp;
unsigned data;
uint8_t chksum = 0;
while ((hex_end && line < hex_end) || *line) {
char cur_state = state;
if (state == CLEM_LOAD_HEX_STATE_EOF) {
break;
}
token_len = (unsigned)(next - line);
switch (cur_state) {
case CLEM_LOAD_HEX_STATE_ERROR:
return false;
case CLEM_LOAD_HEX_STATE_CR:
if (*next == '\n')
state = CLEM_LOAD_HEX_STATE_BEGIN;
else
state = CLEM_LOAD_HEX_STATE_ERROR;
break;
case CLEM_LOAD_HEX_STATE_BEGIN:
if (*next == ':')
state = CLEM_LOAD_HEX_STATE_LENGTH;
else if (isspace(*next))
state = CLEM_LOAD_HEX_STATE_BEGIN;
else
state = CLEM_LOAD_HEX_STATE_ERROR;
break;
case CLEM_LOAD_HEX_STATE_LENGTH:
if (token_len == 2) {
hex_byte_length = 0;
if (!_clem_util_hex_value(&hex_byte_length, line, next)) {
state = CLEM_LOAD_HEX_STATE_ERROR;
} else {
chksum = (uint8_t)(hex_byte_length & 0xff);
clem_memory = clem->mem.fpi_bank_map[bank];
if (clem_memory) {
state = CLEM_LOAD_HEX_STATE_ADR16;
--next; /* backtrack since there's no delim */
} else {
state = CLEM_LOAD_HEX_STATE_ERROR;
}
}
}
break;
case CLEM_LOAD_HEX_STATE_ADR16:
if (token_len == 4) {
if (_clem_util_hex_value(&tmp, line, next)) {
hex_address16 = (tmp & 0xffff);
chksum += (uint8_t)((hex_address16 >> 8) & 0xff);
chksum += (uint8_t)(hex_address16 & 0xff);
state = CLEM_LOAD_HEX_STATE_RECORD;
--next; /* backtrack since there's no delim */
} else {
state = CLEM_LOAD_HEX_STATE_ERROR;
}
}
break;
case CLEM_LOAD_HEX_STATE_RECORD:
if (token_len == 2) {
if (!_clem_util_hex_value(&hex_recordtype, line, next)) {
state = CLEM_LOAD_HEX_STATE_ERROR;
} else {
hex_recordtype &= 0xff;
chksum += (uint8_t)(hex_recordtype);
if (hex_recordtype == CLEM_LOAD_HEX_RECORD_DATA) {
state = CLEM_LOAD_HEX_STATE_DATA;
--next; /* backtrack since there's no delim */
} else if (hex_recordtype == CLEM_LOAD_HEX_RECORD_EOF) {
state = CLEM_LOAD_HEX_STATE_CHKSUM;
--next; /* backtrack since there's no delim */
} else {
/* TODO: support more record types */
state = CLEM_LOAD_HEX_STATE_ERROR;
}
}
}
break;
case CLEM_LOAD_HEX_STATE_DATA:
/* hex data */
tmp = token_len / 2;
if (!(token_len % 2) && tmp > 0) {
--tmp;
if (_clem_util_hex_value(&data, line + tmp * 2, next)) {
chksum += (uint8_t)(data & 0xff);
clem_memory[(hex_address16 + tmp) & 0xffff] = ((uint8_t)(data & 0xff));
} else {
state = CLEM_LOAD_HEX_STATE_ERROR;
}
if (tmp + 1 >= hex_byte_length) {
state = CLEM_LOAD_HEX_STATE_CHKSUM;
--next; /* backtrack since there's no delim */
}
}
break;
case CLEM_LOAD_HEX_STATE_CHKSUM:
if (token_len == 2) {
chksum = 0x01 + (~chksum);
if (_clem_util_hex_value(&tmp, line, next) && chksum == (tmp & 0xff)) {
if (hex_recordtype == CLEM_LOAD_HEX_RECORD_EOF) {
state = CLEM_LOAD_HEX_STATE_EOF;
} else {
state = CLEM_LOAD_HEX_STATE_EOL;
}
} else {
state = CLEM_LOAD_HEX_STATE_ERROR;
}
}
break;
case CLEM_LOAD_HEX_STATE_EOL:
/* ignores the remainder until we hit a newline, which is
handled at the start of this loop
*/
if (*next == '\r')
state = CLEM_LOAD_HEX_STATE_CR;
else if (*next == '\n')
state = CLEM_LOAD_HEX_STATE_BEGIN;
break;
}
if (!(*next)) {
line = next;
} else {
++next;
if (state != cur_state) {
line = next;
}
}
}
return true;
}
unsigned clemens_out_hex_data_from_memory(char *hex, const uint8_t *memory,
unsigned out_hex_byte_limit, unsigned adr) {
unsigned byte_amt = out_hex_byte_limit >> 1; /* 2 digits per byte */
unsigned byte_idx;
unsigned chksum = 0;
if (!byte_amt)
return UINT_MAX;
/* intel hex has a limit of 255 per line - and callers should be aware of
this.
*/
if (byte_amt > 256)
return UINT_MAX;
for (byte_idx = 0; byte_idx < byte_amt; ++byte_idx) {
uint8_t byte = memory[(adr + byte_idx) & 0xffff];
hex[byte_idx * 2] = g_decimal_to_hex[(byte & 0xf0) >> 4];
hex[byte_idx * 2 + 1] = g_decimal_to_hex[(byte & 0x0f)];
chksum += byte;
}
hex[byte_idx * 2] = '\0';
return chksum;
}
unsigned clemens_out_hex_data_body(const ClemensMachine *clem, char *hex,
unsigned out_hex_byte_limit, unsigned bank, unsigned adr) {
const uint8_t *memory;
if (bank == 0xe0 || bank == 0xe1) {
memory = clem->mem.mega2_bank_map[bank & 0x1];
} else {
memory = clem->mem.fpi_bank_map[bank & 0xff];
}
return clemens_out_hex_data_from_memory(hex, memory, out_hex_byte_limit, adr);
}
void clemens_out_bin_data(const ClemensMachine *clem, uint8_t *out, unsigned out_byte_cnt,
uint8_t bank, uint16_t adr) {
const uint8_t *memory;
unsigned left0, right0;
if (bank == 0xe0 || bank == 0xe1) {
memory = clem->mem.mega2_bank_map[bank & 0x1];
} else {
memory = clem->mem.fpi_bank_map[bank & 0xff];
}
if (out_byte_cnt > 0x10000) {
out_byte_cnt = 0x10000; /* one bank maximum byte copy */
}
/* extreme edge case, but the API allows this - wraparound */
left0 = adr;
right0 = (unsigned)adr + out_byte_cnt;
if (right0 > 0x10000) {
unsigned left1 = 0;
unsigned right1 = right0 - 0x10000;
right0 &= 0xffff;
memcpy(out + right1, memory + left1, right1 - left1);