int m7700_disassemble(char* buff, unsigned int pc, unsigned int pb, int m_flag, int x_flag)
{
unsigned int instruction;
opcode_struct *opcode;
char* ptr;
int var;
signed char varS;
int length = 1;
unsigned int address;
pb <<= 16;
address = pc | pb;
instruction = read_8(address);
// check for prefixes
switch (instruction)
{
case 0x42:
address++;
length++;
instruction = read_8(address);
opcode = g_opcodes_prefix42 + instruction;
break;
case 0x89:
address++;
length++;
instruction = read_8(address);
opcode = g_opcodes_prefix89 + instruction;
break;
default:
opcode = g_opcodes + instruction;
break;
}
sprintf(buff, "%s", g_opnames[opcode->name]);
ptr = buff + strlen(buff);
switch(opcode->ea)
{
case IMP :
break;
case ACC :
sprintf(ptr, " A");
break;
case ACCB :
sprintf(ptr, " B");
break;
case RELB:
varS = read_8(address+1);
length++;
sprintf(ptr, " %06x (%s)", pb | ((pc + length + varS)&0xffff), int_8_str(varS));
break;
case RELW:
case PER :
var = read_16(address+1);
sprintf(ptr, " %06x (%s)", pb | ((pc + 1 + var)&0xffff), int_16_str(var));
length += 2;
break;
case IMM :
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x", read_16(address+1));
length += 2;
}
else
{
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
}
break;
case BBCD:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
varS = read_8(address+4);
length += 4;
sprintf(ptr, " #$%04x, $%02x, %06x (%s)", read_16(address+2), read_8(address+1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
else
{
varS = read_8(address+3);
length += 3;
sprintf(ptr, " #$%02x, $%02x, %06x (%s)", read_8(address+2), read_8(address+1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
break;
case BBCA:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
length += 5;
varS = read_8(address+5);
sprintf(ptr, " #$%04x, $%04x, %06x (%s)", read_16(address+3), read_16(address+1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
else
{
length += 4;
varS = read_8(address+4);
sprintf(ptr, " #$%02x, $%04x, %06x (%s)", read_8(address+3), read_16(address+1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
break;
case LDM4:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%02x", read_16(address+2), read_8(address+1));
length += 3;
}
else
{
sprintf(ptr, " #$%02x, $%02x", read_8(address+2), read_8(address+1));
length += 2;
}
break;
case LDM5:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%04x", read_16(address+3), read_16(address+1));
length += 4;
}
else
{
sprintf(ptr, " #$%02x, $%04x", read_8(address+3), read_16(address+1));
length += 3;
}
break;
case LDM4X:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%02x, X", read_16(address+2), read_8(address+1));
length += 3;
}
else
{
sprintf(ptr, " #$%02x, $%02x, X", read_8(address+2), read_8(address+1));
length += 2;
}
break;
case LDM5X:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%04x, X", read_16(address+3), read_16(address+1));
length += 4;
}
else
{
sprintf(ptr, " #$%02x, $%04x, X", read_8(address+3), read_16(address+1));
length += 3;
}
break;
case A :
case PEA :
sprintf(ptr, " $%04x", read_16(address+1));
length += 2;
break;
case AI :
sprintf(ptr, " ($%04x)", read_16(address+1));
length += 2;
break;
case AL :
sprintf(ptr, " $%06x", read_24(address+1));
length += 3;
break;
case ALX :
sprintf(ptr, " $%06x,X", read_24(address+1));
length += 3;
break;
case AX :
sprintf(ptr, " $%04x,X", read_16(address+1));
length += 2;
break;
case AXI :
sprintf(ptr, " ($%04x,X)", read_16(address+1));
length += 2;
break;
case AY :
sprintf(ptr, " $%04x,Y", read_16(address+1));
length += 2;
break;
case D :
sprintf(ptr, " $%02x", read_8(address+1));
length++;
break;
case DI :
case PEI :
sprintf(ptr, " ($%02x)", read_8(address+1));
length++;
break;
case DIY :
sprintf(ptr, " ($%02x),Y", read_8(address+1));
length++;
break;
case DLI :
sprintf(ptr, " [$%02x]", read_8(address+1));
length++;
break;
case DLIY:
sprintf(ptr, " [$%02x],Y", read_8(address+1));
length++;
break;
case DX :
sprintf(ptr, " $%02x,X", read_8(address+1));
length++;
break;
case DXI :
sprintf(ptr, " ($%02x,X)", read_8(address+1));
length++;
break;
case DY :
sprintf(ptr, " $%02x,Y", read_8(address+1));
length++;
break;
case S :
sprintf(ptr, " %s,S", int_8_str(read_8(address+1)));
length++;
break;
case SIY :
sprintf(ptr, " (%s,S),Y", int_8_str(read_8(address+1)));
length++;
break;
case SIG :
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
break;
case MVN :
case MVP :
sprintf(ptr, " $%02x, $%02x", read_8(address+2), read_8(address+1));
length += 2;
break;
}
return length;
}
unsigned g65816_disassemble(char* buff, unsigned int pc, unsigned int pb, const UINT8 *oprom, int m_flag, int x_flag)
{
unsigned int instruction;
const opcode_struct* opcode;
char* ptr;
int var;
int length = 1;
unsigned int address;
unsigned dasm_flags;
pb <<= 16;
address = pc | pb;
base_oprom = oprom;
base_pc = address;
instruction = read_8(address);
opcode = g_opcodes + instruction;
strcpy(buff, g_opnames[opcode->name]);
ptr = buff + strlen(buff);
switch(opcode->name)
{
case JSR:
case JSL:
dasm_flags = DASMFLAG_STEP_OVER;
break;
case RTI:
case RTL:
case RTS:
dasm_flags = DASMFLAG_STEP_OUT;
break;
default:
dasm_flags = 0;
break;
}
switch(opcode->ea)
{
case IMP :
break;
case ACC :
sprintf(ptr, "A");
break;
case RELB:
var = (INT8) read_8(address+1);
length++;
sprintf(ptr, " %06x (%s)", pb | ((pc + length + var)&0xffff), int_8_str(var));
break;
case RELW:
case PER :
var = read_16(address+1);
sprintf(ptr, " %06x (%s)", pb | ((pc + 1 + var)&0xffff), int_16_str(var));
length += 2;
break;
case IMM :
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x", read_16(address+1));
length += 2;
}
else
{
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
}
break;
case A :
case PEA :
sprintf(ptr, " $%04x", read_16(address+1));
length += 2;
break;
case AI :
sprintf(ptr, " ($%04x)", read_16(address+1));
length += 2;
break;
case AL :
sprintf(ptr, " $%06x", read_24(address+1));
length += 3;
break;
case ALX :
sprintf(ptr, " $%06x,X", read_24(address+1));
length += 3;
break;
case AX :
sprintf(ptr, " $%04x,X", read_16(address+1));
length += 2;
break;
case AXI :
sprintf(ptr, " ($%04x,X)", read_16(address+1));
length += 2;
break;
case AY :
sprintf(ptr, " $%04x,Y", read_16(address+1));
length += 2;
break;
case D :
sprintf(ptr, " $%02x", read_8(address+1));
length++;
break;
case DI :
case PEI :
sprintf(ptr, " ($%02x)", read_8(address+1));
length++;
break;
case DIY :
sprintf(ptr, " ($%02x),Y", read_8(address+1));
length++;
break;
case DLI :
sprintf(ptr, " [$%02x]", read_8(address+1));
length++;
break;
case DLIY:
sprintf(ptr, " [$%02x],Y", read_8(address+1));
length++;
break;
case DX :
sprintf(ptr, " $%02x,X", read_8(address+1));
length++;
break;
case DXI :
sprintf(ptr, " ($%02x,X)", read_8(address+1));
length++;
break;
case DY :
sprintf(ptr, " $%02x,Y", read_8(address+1));
length++;
break;
case S :
sprintf(ptr, " %s,S", int_8_str(read_8(address+1)));
length++;
break;
case SIY :
sprintf(ptr, " (%s,S),Y", int_8_str(read_8(address+1)));
length++;
break;
case SIG :
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
break;
case MVN :
case MVP :
sprintf(ptr, " $%02x, $%02x", read_8(address+2), read_8(address+1));
length += 2;
break;
}
return length | DASMFLAG_SUPPORTED | dasm_flags;
}
int m7700_disassemble(char* buff, unsigned int pc, unsigned int pb, const UINT8 *oprom, int m_flag, int x_flag)
{
unsigned int instruction;
const m7700_opcode_struct *opcode;
char* ptr;
int var;
signed char varS;
int length = 1;
unsigned int address;
//unsigned int start;
UINT32 flags = 0;
pb <<= 16;
address = pc | pb;
//start = address;
instruction = read_8(oprom,0);
// check for prefixes
switch (instruction)
{
case 0x42:
address++;
length++;
oprom++;
instruction = read_8(oprom,0);
opcode = &m7700_opcode_struct::get_prefix42(instruction);
break;
case 0x89:
address++;
length++;
oprom++;
instruction = read_8(oprom,0);
opcode = &m7700_opcode_struct::get_prefix89(instruction);
break;
default:
opcode = &m7700_opcode_struct::get(instruction);
break;
}
if (opcode->is_call())
flags = DASMFLAG_STEP_OVER;
else if (opcode->is_return())
flags = DASMFLAG_STEP_OUT;
sprintf(buff, "%s", opcode->name());
ptr = buff + strlen(buff);
switch(opcode->ea)
{
case IMP :
break;
case ACC :
sprintf(ptr, " A");
break;
case ACCB :
sprintf(ptr, " B");
break;
case RELB:
varS = read_8(oprom,1);
length++;
sprintf(ptr, " %06x (%s)", pb | ((pc + length + varS)&0xffff), int_8_str(varS));
break;
case RELW:
case PER :
var = read_16(oprom,1);
length += 2;
sprintf(ptr, " %06x (%s)", pb | ((pc + length + var)&0xffff), int_16_str(var));
break;
case IMM :
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x", read_16(oprom,1));
length += 2;
}
else
{
sprintf(ptr, " #$%02x", read_8(oprom,1));
length++;
}
break;
case BBCD:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
varS = read_8(oprom,4);
length += 4;
sprintf(ptr, " #$%04x, $%02x, %06x (%s)", read_16(oprom,2), read_8(oprom,1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
else
{
varS = read_8(oprom,3);
length += 3;
sprintf(ptr, " #$%02x, $%02x, %06x (%s)", read_8(oprom,2), read_8(oprom,1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
break;
case BBCA:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
length += 5;
varS = read_8(oprom,5);
sprintf(ptr, " #$%04x, $%04x, %06x (%s)", read_16(oprom,3), read_16(oprom,1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
else
{
length += 4;
varS = read_8(oprom,4);
sprintf(ptr, " #$%02x, $%04x, %06x (%s)", read_8(oprom,3), read_16(oprom,1), pb | ((pc + length + varS)&0xffff), int_8_str(varS));
}
break;
case LDM4:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%02x", read_16(oprom,2), read_8(oprom,1));
length += 3;
}
else
{
sprintf(ptr, " #$%02x, $%02x", read_8(oprom,2), read_8(oprom,1));
length += 2;
}
break;
case LDM5:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%04x", read_16(oprom,3), read_16(oprom,1));
length += 4;
}
else
{
sprintf(ptr, " #$%02x, $%04x", read_8(oprom,3), read_16(oprom,1));
length += 3;
}
break;
case LDM4X:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%02x, X", read_16(oprom,2), read_8(oprom,1));
length += 3;
}
else
{
sprintf(ptr, " #$%02x, $%02x, X", read_8(oprom,2), read_8(oprom,1));
length += 2;
}
break;
case LDM5X:
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x, $%04x, X", read_16(oprom,3), read_16(oprom,1));
length += 4;
}
else
{
sprintf(ptr, " #$%02x, $%04x, X", read_8(oprom,3), read_16(oprom,1));
length += 3;
}
break;
case A :
case PEA :
sprintf(ptr, " $%04x", read_16(oprom,1));
length += 2;
break;
case AI :
sprintf(ptr, " ($%04x)", read_16(oprom,1));
length += 2;
break;
case AL :
sprintf(ptr, " $%06x", read_24(oprom,1));
length += 3;
break;
case ALX :
sprintf(ptr, " $%06x,X", read_24(oprom,1));
length += 3;
break;
case AX :
sprintf(ptr, " $%04x,X", read_16(oprom,1));
length += 2;
break;
case AXI :
sprintf(ptr, " ($%04x,X)", read_16(oprom,1));
length += 2;
break;
case AY :
sprintf(ptr, " $%04x,Y", read_16(oprom,1));
length += 2;
break;
case D :
sprintf(ptr, " $%02x", read_8(oprom,1));
length++;
break;
case DI :
case PEI :
sprintf(ptr, " ($%02x)", read_8(oprom,1));
length++;
break;
case DIY :
sprintf(ptr, " ($%02x),Y", read_8(oprom,1));
length++;
break;
case DLI :
sprintf(ptr, " [$%02x]", read_8(oprom,1));
length++;
break;
case DLIY:
sprintf(ptr, " [$%02x],Y", read_8(oprom,1));
length++;
break;
case DX :
sprintf(ptr, " $%02x,X", read_8(oprom,1));
length++;
break;
case DXI :
sprintf(ptr, " ($%02x,X)", read_8(oprom,1));
length++;
break;
case DY :
sprintf(ptr, " $%02x,Y", read_8(oprom,1));
length++;
break;
case S :
sprintf(ptr, " %s,S", int_8_str(read_8(oprom,1)));
length++;
break;
case SIY :
sprintf(ptr, " (%s,S),Y", int_8_str(read_8(oprom,1)));
length++;
break;
case SIG :
sprintf(ptr, " #$%02x", read_8(oprom,1));
length++;
break;
case MVN :
case MVP :
sprintf(ptr, " $%02x, $%02x", read_8(oprom,2), read_8(oprom,1));
length += 2;
break;
}
return length | flags | DASMFLAG_SUPPORTED;
}
int g65816_disassemble(char* buff, unsigned int pc, unsigned int pb, int m_flag, int x_flag)
{
unsigned int instruction;
opcode_struct* opcode;
char* ptr;
int var;
int length = 1;
unsigned int address;
pb <<= 16;
address = pc | pb;
instruction = read_8(address);
opcode = g_opcodes + instruction;
strcpy(buff, g_opnames[opcode->name]);
ptr = buff + strlen(buff);
switch(opcode->ea)
{
case IMP :
break;
case ACC :
sprintf(ptr, "A");
break;
case RELB:
var = read_8(address+1);
length++;
sprintf(ptr, " %06x (%s)", pb | ((pc + length + var)&0xffff), int_8_str(var));
break;
case RELW:
case PER :
var = read_16(address+1);
sprintf(ptr, " %06x (%s)", pb | ((pc + 1 + var)&0xffff), int_16_str(var));
length += 2;
break;
case IMM :
if((opcode->flag == M && !m_flag) || (opcode->flag == X && !x_flag))
{
sprintf(ptr, " #$%04x", read_16(address+1));
length += 2;
}
else
{
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
}
break;
case A :
case PEA :
sprintf(ptr, " $%04x", read_16(address+1));
length += 2;
break;
case AI :
sprintf(ptr, " ($%04x)", read_16(address+1));
length += 2;
break;
case AL :
sprintf(ptr, " $%06x", read_24(address+1));
length += 3;
break;
case ALX :
sprintf(ptr, " $%06x,X", read_24(address+1));
length += 3;
break;
case AX :
sprintf(ptr, " $%04x,X", read_16(address+1));
length += 2;
break;
case AXI :
sprintf(ptr, " ($%04x,X)", read_16(address+1));
length += 2;
break;
case AY :
sprintf(ptr, " $%04x,Y", read_16(address+1));
length += 2;
break;
case D :
sprintf(ptr, " $%02x", read_8(address+1));
length++;
break;
case DI :
case PEI :
sprintf(ptr, " ($%02x)", read_8(address+1));
length++;
break;
case DIY :
sprintf(ptr, " ($%02x),Y", read_8(address+1));
length++;
break;
case DLI :
sprintf(ptr, " [$%02x]", read_8(address+1));
length++;
break;
case DLIY:
sprintf(ptr, " [$%02x],Y", read_8(address+1));
length++;
break;
case DX :
sprintf(ptr, " $%02x,X", read_8(address+1));
length++;
break;
case DXI :
sprintf(ptr, " ($%02x,X)", read_8(address+1));
length++;
break;
case DY :
sprintf(ptr, " $%02x,Y", read_8(address+1));
length++;
break;
case S :
sprintf(ptr, " %s,S", int_8_str(read_8(address+1)));
length++;
break;
case SIY :
sprintf(ptr, " (%s,S),Y", int_8_str(read_8(address+1)));
length++;
break;
case SIG :
sprintf(ptr, " #$%02x", read_8(address+1));
length++;
break;
case MVN :
case MVP :
sprintf(ptr, " $%02x, $%02x", read_8(address+2), read_8(address+1));
length += 2;
break;
}
return length;
}