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Dasm6500.cpp
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Dasm6500.cpp
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/***************************************************************************
* dasmfw -- Disassembler Framework *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
***************************************************************************/
/* Copyright (C) Hermann Seib *
***************************************************************************/
/*****************************************************************************/
/* Dasm650X.cpp : 650X disassembler implementation */
/*****************************************************************************/
#include "Dasm6500.h"
/*****************************************************************************/
/* Create6501 : create an 6501 processor handler */
/*****************************************************************************/
static Disassembler *Create6501(Application *pApp)
{
Disassembler *pDasm = new Dasm6501(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Create6503 : create an 6503 processor handler */
/*****************************************************************************/
static Disassembler *Create6503(Application *pApp)
{
Disassembler *pDasm = new Dasm6503(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Create6504 : create an 6504 processor handler */
/*****************************************************************************/
static Disassembler *Create6504(Application *pApp)
{
Disassembler *pDasm = new Dasm6504(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Create65C02 : create an 65C02 processor handler */
/*****************************************************************************/
static Disassembler *Create65C02(Application *pApp)
{
Disassembler *pDasm = new Dasm65C02(pApp);
if (pDasm) pDasm->Setup();
return pDasm;
}
/*****************************************************************************/
/* Auto-registration */
/*****************************************************************************/
static bool bRegistered[] =
{
RegisterDisassembler("6501", Create6501),
RegisterDisassembler("7501", Create6501),
RegisterDisassembler("6502", Create6501),
RegisterDisassembler("6503", Create6503),
RegisterDisassembler("6504", Create6504),
RegisterDisassembler("6505", Create6503),
RegisterDisassembler("6506", Create6503),
RegisterDisassembler("6507", Create6504),
RegisterDisassembler("65c02", Create65C02),
};
/*===========================================================================*/
/* Dasm650X class members */
/*===========================================================================*/
/*****************************************************************************/
/* m6500_codes : table of all 6500 instruction bytes and types */
/*****************************************************************************/
CMatrixEntry Dasm650X::m6500_codes[256] =
{
{_brk ,_imp}, {_ora ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* 00..03 */
{_ill ,_nom}, {_ora ,_zpg}, {_asl ,_zpg}, {_ill ,_nom}, /* 04..07 */
{_php ,_imp}, {_ora ,_imm}, {_asl ,_acc}, {_ill ,_nom}, /* 08..0B */
{_ill ,_nom}, {_ora ,_abs}, {_asl ,_abs}, {_ill ,_nom}, /* 0C..0F */
{_bpl ,_rel}, {_ora ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* 10..13 */
{_ill ,_nom}, {_ora ,_zpx}, {_asl ,_zpx}, {_ill ,_nom}, /* 14..17 */
{_clc ,_imp}, {_ora ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* 18..1B */
{_ill ,_nom}, {_ora ,_abx}, {_asl ,_abx}, {_ill ,_nom}, /* 1C..1F */
{_jsr,_abs|_nof},{_and,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* 20..23 */
{_bit ,_zpg}, {_and ,_zpg}, {_rol ,_zpg}, {_ill ,_nom}, /* 24..27 */
{_plp ,_imp}, {_and ,_imm}, {_rol ,_acc}, {_ill ,_nom}, /* 28..2B */
{_bit ,_abs}, {_and ,_abs}, {_rol ,_abs}, {_ill ,_nom}, /* 2C..2F */
{_bmi ,_rel}, {_and ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* 30..33 */
{_ill ,_nom}, {_and ,_zpx}, {_rol ,_zpx}, {_ill ,_nom}, /* 34..37 */
{_sec ,_imp}, {_and ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* 38..3B */
{_ill ,_nom}, {_and ,_abx}, {_rol ,_abx}, {_ill ,_nom}, /* 3C..3F */
{_rti ,_imp}, {_eor ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* 40..43 */
{_ill ,_nom}, {_eor ,_zpg}, {_lsr ,_zpg}, {_ill ,_nom}, /* 44..47 */
{_pha ,_imp}, {_eor ,_imm}, {_lsr ,_acc}, {_ill ,_nom}, /* 48..4B */
{_jmp ,_abs}, {_eor ,_abs}, {_lsr ,_abs}, {_ill ,_nom}, /* 4C..4F */
{_bvc ,_rel}, {_eor ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* 50..53 */
{_ill ,_nom}, {_eor ,_zpx}, {_lsr ,_zpx}, {_ill ,_nom}, /* 54..57 */
{_cli ,_imp}, {_eor ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* 58..5B */
{_ill ,_nom}, {_eor ,_abx}, {_lsr ,_abx}, {_ill ,_nom}, /* 5C..5F */
{_rts ,_imp}, {_adc ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* 60..63 */
{_ill ,_nom}, {_adc ,_zpg}, {_ror ,_zpg}, {_ill ,_nom}, /* 64..67 */
{_pla ,_imp}, {_adc ,_imm}, {_ror ,_acc}, {_ill ,_nom}, /* 68..6B */
{_jmp ,_ind}, {_adc ,_abs}, {_ror ,_abs}, {_ill ,_nom}, /* 6C..6F */
{_bvs ,_rel}, {_adc ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* 70..73 */
{_ill ,_nom}, {_adc ,_zpx}, {_ror ,_zpx}, {_ill ,_nom}, /* 74..77 */
{_sei ,_imp}, {_adc ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* 78..7B */
{_ill ,_nom}, {_adc ,_abx}, {_ror ,_abx}, {_ill ,_nom}, /* 7C..7F */
{_ill ,_nom}, {_sta ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* 80..83 */
{_sty ,_zpg}, {_sta ,_zpg}, {_stx ,_zpg}, {_ill ,_nom}, /* 84..87 */
{_dey ,_imp}, {_ill ,_nom}, {_txa ,_imp}, {_ill ,_nom}, /* 88..8B */
{_sty ,_abs}, {_sta ,_abs}, {_stx ,_abs}, {_ill ,_nom}, /* 8C..8F */
{_bcc ,_rel}, {_sta ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* 90..93 */
{_sty ,_zpx}, {_sta ,_zpx}, {_stx ,_zpy}, {_ill ,_nom}, /* 94..97 */
{_tya ,_imp}, {_sta ,_aby}, {_txs ,_imp}, {_ill ,_nom}, /* 98..9B */
{_ill ,_nom}, {_sta ,_abx}, {_ill ,_nom}, {_ill ,_nom}, /* 9C..9F */
{_ldy ,_imm}, {_lda ,_idx}, {_ldx ,_imm}, {_ill ,_nom}, /* A0..A3 */
{_ldy ,_zpg}, {_lda ,_zpg}, {_ldx ,_zpg}, {_ill ,_nom}, /* A4..A7 */
{_tay ,_imp}, {_lda ,_imm}, {_tax ,_imp}, {_ill ,_nom}, /* A8..AB */
{_ldy ,_abs}, {_lda ,_abs}, {_ldx ,_abs}, {_ill ,_nom}, /* AC..AF */
{_bcs ,_rel}, {_lda ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* B0..B3 */
{_ldy ,_zpx}, {_lda ,_zpx}, {_ldx ,_zpy}, {_ill ,_nom}, /* B4..B7 */
{_clv ,_imp}, {_lda ,_aby}, {_tsx ,_imp}, {_ill ,_nom}, /* B8..BB */
{_ldy ,_abx}, {_lda ,_abx}, {_ldx ,_aby}, {_ill ,_nom}, /* BC..BF */
{_cpy ,_imm}, {_cmp ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* C0..C3 */
{_cpy ,_zpg}, {_cmp ,_zpg}, {_dec ,_zpg}, {_ill ,_nom}, /* C4..C7 */
{_iny ,_imp}, {_cmp ,_imm}, {_dex ,_imp}, {_ill ,_nom}, /* C8..CB */
{_cpy ,_abs}, {_cmp ,_abs}, {_dec ,_abs}, {_ill ,_nom}, /* CC..CF */
{_bne ,_rel}, {_cmp ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* D0..D3 */
{_ill ,_nom}, {_cmp ,_zpx}, {_dec ,_zpx}, {_ill ,_nom}, /* D4..D7 */
{_cld ,_imp}, {_cmp ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* D8..DB */
{_ill ,_nom}, {_cmp ,_abx}, {_dec ,_abx}, {_ill ,_nom}, /* DC..DF */
{_cpx ,_imm}, {_sbc ,_idx}, {_ill ,_nom}, {_ill ,_nom}, /* E0..E3 */
{_cpx ,_zpg}, {_sbc ,_zpg}, {_inc ,_zpg}, {_ill ,_nom}, /* E4..E7 */
{_inx ,_imp}, {_sbc ,_imm}, {_nop ,_imp}, {_ill ,_nom}, /* E8..EB */
{_cpx ,_abs}, {_sbc ,_abs}, {_inc ,_abs}, {_ill ,_nom}, /* EC..EF */
{_beq ,_rel}, {_sbc ,_idy}, {_ill ,_nom}, {_ill ,_nom}, /* F0..F3 */
{_ill ,_nom}, {_sbc ,_zpx}, {_inc ,_zpx}, {_ill ,_nom}, /* F4..F7 */
{_sed ,_imp}, {_sbc ,_aby}, {_ill ,_nom}, {_ill ,_nom}, /* F8..FB */
{_ill ,_nom}, {_sbc ,_abx}, {_inc ,_abx}, {_ill ,_nom}, /* FC..FF */
};
/*****************************************************************************/
/* opcodes : 6500 opcodes array for initialization */
/*****************************************************************************/
OpCode Dasm650X::opcodes[mnemo6500_count] =
{
{ "EQU", Data }, /* _equ */
{ "RMB", Data }, /* _rmb */
{ "FCB", Data }, /* _fcb */
{ "FDB", Data }, /* _fcb */
{ "FCC", Data }, /* _fcc */
{ "ORG", Data }, /* _org */
{ "PHASE", Data }, /* _phase */
{ "DEPHASE", Data }, /* _dephase */
{ "END", Data }, /* _end */
{ "???", Data }, /* _ill */
{ "ADC", Data }, /* _adc */
{ "AND", Data }, /* _and */
{ "ASL", Data }, /* _asl */
{ "BCC", Code }, /* _bcc */
{ "BCS", Code }, /* _bcs */
{ "BEQ", Code }, /* _beq */
{ "BIT", Data }, /* _bit */
{ "BMI", Code }, /* _bmi */
{ "BNE", Code }, /* _bne */
{ "BPL", Code }, /* _bpl */
{ "BRK", Code }, /* _brk */
{ "BVC", Code }, /* _bvc */
{ "BVS", Code }, /* _bvs */
{ "CLC", Data }, /* _clc */
{ "CLD", Data }, /* _cld */
{ "CLI", Data }, /* _cli */
{ "CLV", Data }, /* _clv */
{ "CMP", Data }, /* _cmp */
{ "CPX", Data }, /* _cpx */
{ "CPY", Data }, /* _cpy */
{ "DEC", Data }, /* _dec */
{ "DEX", Data }, /* _dex */
{ "DEY", Data }, /* _dey */
{ "EOR", Data }, /* _eor */
{ "INC", Data }, /* _inc */
{ "INX", Data }, /* _inx */
{ "INY", Data }, /* _iny */
{ "JMP", Code }, /* _jmp */
{ "JSR", Code }, /* _jsr */
{ "LDA", Data }, /* _lda */
{ "LDX", Data }, /* _ldx */
{ "LDY", Data }, /* _ldy */
{ "LSR", Data }, /* _lsr */
{ "NOP", Data }, /* _nop */
{ "ORA", Data }, /* _ora */
{ "PHA", Data }, /* _pha */
{ "PHP", Data }, /* _php */
{ "PLA", Data }, /* _pla */
{ "PLP", Data }, /* _plp */
{ "ROL", Data }, /* _rol */
{ "ROR", Data }, /* _ror */
{ "RTI", Code }, /* _rti */
{ "RTS", Code }, /* _rts */
{ "SBC", Data }, /* _sbc */
{ "SEC", Data }, /* _sec */
{ "SED", Data }, /* _sed */
{ "SEI", Data }, /* _sei */
{ "STA", Data }, /* _sta */
{ "STX", Data }, /* _stx */
{ "STY", Data }, /* _sty */
{ "TAX", Data }, /* _tax */
{ "TAY", Data }, /* _tay */
{ "TSX", Data }, /* _tsx */
{ "TXA", Data }, /* _txa */
{ "TXS", Data }, /* _txs */
{ "TYA", Data }, /* _tya */
};
/*****************************************************************************/
/* regnames : 6500 register names array for initialization */
/*****************************************************************************/
const char *Dasm650X::regnames[reg6500_count] =
{
"A", /* _a */
"X", /* _x */
"Y", /* _y */
"P", /* _p */
"PC", /* _pc */
};
/*****************************************************************************/
/* Dasm650X : constructor */
/*****************************************************************************/
Dasm650X::Dasm650X(Application *pApp)
: Disassembler(pApp)
{
codes = m6500_codes;
useConvenience = true;
dirpage = 0; // ... and that's all it can be for 650X
useFCC = true;
forceExtendedAddr = true;
forceDirectAddr = true;
closeCC = false;
useDPLabels = false;
accparm = true;
textZpgAddr = "p-<";
textAbsAddr = "p->";
mnemo.resize(mnemo6500_count); /* set up mnemonics table */
for (int i = 0; i < mnemo6500_count; i++)
mnemo[i] = opcodes[i];
regname.resize(reg6500_count); /* set up register name table */
for (int i = 0; i < reg6500_count; i++)
regname[i] = regnames[i];
// set up options table
// class uses one generic option setter/getter pair (not mandatory)
#if 0
// none yet
AddOption("conv", "{off|on}\tUse convenience macros",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
#endif
AddOption("closecc", "{off|on}\tadd closing delimiter to char constants",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("fcc", "{off|on}\tuse FCC to define data",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("dplabel", "{off|on}\tinterpret single-byte data as direct page labels",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("forceaddr", "{off|on}\tuse forced addressing where necessary",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("forcezpgaddr","{string}\tstring pattern to use for forced zero-page addressing",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("forceabsaddr","{string}\tstring pattern to use for forced absolute addressing",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
AddOption("accparm","{string}\taccumulator addressing sets parameter",
static_cast<PSetter>(&Dasm650X::Set6500Option),
static_cast<PGetter>(&Dasm650X::Get6500Option));
}
/*****************************************************************************/
/* ~Dasm650X : destructor */
/*****************************************************************************/
Dasm650X::~Dasm650X(void)
{
}
/*****************************************************************************/
/* Set6500Option : sets a disassembler option */
/*****************************************************************************/
int Dasm650X::Set6500Option(string lname, string value)
{
bool bnValue = true; /* default to "on" */
bool bIsBool = ParseBool(value, bnValue);
if (lname == "conv")
{
useConvenience = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "closecc")
{
closeCC = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "fcc")
{
useFCC = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "dplabel")
{
useDPLabels = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "forceaddr")
{
forceExtendedAddr = forceDirectAddr = bnValue;
return bIsBool ? 1 : 0;
}
else if (lname == "forcezpgaddr")
textZpgAddr = value;
else if (lname == "forceabsaddr")
textAbsAddr = value;
else if (lname == "accparm")
{
accparm = bnValue;
return bIsBool ? 1 : 0;
}
else
return 0; /* only name consumed */
// should never happen ... but better safe than sorry
return 1; /* name and value consumed */
}
/*****************************************************************************/
/* Get6500Option : retrieves a disassembler option */
/*****************************************************************************/
string Dasm650X::Get6500Option(string lname)
{
if (lname == "conv")
return useConvenience ? "on" : "off";
else if (lname == "closecc")
return closeCC ? "on" : "off";
else if (lname == "fcc")
return useFCC ? "on" : "off";
else if (lname == "dplabel")
return useDPLabels ? "on" : "off";
else if (lname == "forceaddr")
return (forceExtendedAddr || forceDirectAddr) ? "on" : "off";
else if (lname == "forcezpgaddr")
return textZpgAddr;
else if (lname == "forceabsaddr")
return textAbsAddr;
else if (lname == "accparm")
return accparm ? "on" : "off";
return "";
}
/*****************************************************************************/
/* String2Number : convert a string to a number in all known formats */
/*****************************************************************************/
bool Dasm650X::String2Number(string s, adr_t &value)
{
/* Standard formats for known 680x assemblers :
- a character has a leading '
and may be followed by a (n unchecked) closing '
- a binary has a leading %
- an octal constant has a leading @
- a hex constant has a leading $
*/
s = ltrim(s);
if (s[0] == '$')
return (sscanf(s.substr(1).c_str(), "%x", &value) == 1);
else if (s[0] == '@')
return (sscanf(s.substr(1).c_str(), "%o", &value) == 1);
else if (s[0] == '\'' && s.size() > 1)
{
value = s[1];
return true;
}
else if (s[0] == '%')
{
for (string::size_type i = 1; i < s.size(); i++)
{
char c = s[i];
if (c >= '0' && c <= '1')
value = (value << 1) + (c - '0');
else
return false;
}
}
// allow base class to check for others
return Disassembler::String2Number(s, value);
}
/*****************************************************************************/
/* Number2String : converts a number to a string in a variety of formats */
/*****************************************************************************/
string Dasm650X::Number2String
(
adr_t value,
int nDigits,
adr_t addr,
int bus
)
{
(void)bus;
string s;
/* Standard formats for known 650x assemblers :
- a character has a leading '
and may be followed by a (n unchecked) closing '
- a binary has a leading %
- an octal constant has a leading @
- a hex constant has a leading $
*/
MemAttribute::Type cellType = GetCellType(addr);
MemAttribute::Display disp;
bool bSigned = false;
if (cellType == MemAttribute::CellUntyped)
disp = MemAttribute::DefaultDisplay;
else
{
disp = GetDisplay(addr);
bSigned = IsSigned(addr);
}
if (disp == MemAttribute::DefaultDisplay)
disp = defaultDisplay;
if ((nDigits == 2) && /* if 2-digit value */
(disp == MemAttribute::Char)) /* and character output requested */
{
value &= 0xff;
if (isprint(value))
s = sformat("'%c%s", value, closeCC ? "'" : "");
else
s = sformat("$%02x", value);
}
else if (disp == MemAttribute::Binary) /* if a binary */
{
int nBit;
nDigits *= 4; /* convert from digits to bits */
s = '%'; /* prepare a binary value */
/* now do for all bits */
for (nBit = nDigits - 1; nBit >= 0; nBit--)
s.push_back('0' + (!!(value & (1 << nBit))));
}
else if (disp == MemAttribute::Hex) /* if hex */
{
adr_t mask = 0;
for (int i = 0; i < nDigits; i++)
mask |= (0x0f << (i * 4));
value &= mask;
s = sformat("$%0*X", nDigits, value); /* prepare a hex value */
}
else if (disp == MemAttribute::Octal) /* if octal display */
s = sformat("@%0*o", (nDigits * 4) + 2 / 3, value);
else /* otherwise */
{
if (bSigned)
{
int32_t sval; // sign extension, simple way
if (nDigits == 2) sval = (int32_t)((int8_t)value);
else if (nDigits == 4) sval = (int32_t)((int16_t)value);
else sval = (int32_t)value;
s = sformat("%d", sval); /* prepare signed decimal value */
}
else
{
adr_t mask = 0;
for (int i = 0; i < nDigits; i++)
mask |= (0x0f << (i * 4));
value &= mask;
s = sformat("%u", value); /* prepare unsigned decimal value */
}
}
return s; /* pass back generated string */
}
/*****************************************************************************/
/* AddForced : add forced zero-page or absolute addressing specifier */
/*****************************************************************************/
void Dasm650X::AddForced(string &smnemo, string &sparm, bool bAbsolute)
{
string sf = bAbsolute ? textAbsAddr : textZpgAddr;
bool bMnemo = false;
bool bAppend = false;
int txtat = 0;
char c = tolower(sf[0]);
if (c == 'm' || c == 'p')
{
bMnemo = (c == 'm');
c = tolower(sf[++txtat]);
if (c == '-' || c == '+')
{
bAppend = (c == '+');
++txtat;
}
}
if (bMnemo)
{
smnemo = (bAppend) ?
smnemo + sf.substr(txtat) :
sf.substr(txtat) + smnemo;
}
else
{
sparm = (bAppend) ?
sparm + sf.substr(txtat) :
sf.substr(txtat) + sparm;
}
}
/*****************************************************************************/
/* InitParse : initialize parsing */
/*****************************************************************************/
bool Dasm650X::InitParse(int bus)
{
if (bus == BusCode)
{
if (bSetSysVec)
{
// set up IRQ-RST system vectors
static const char *vectbl[] =
{
"NMI", /* fffa */
"RST", /* fffc */
"IRQ" /* fffe */
};
adr_t vecStart = GetHighestCodeAddr() - 5;
for (adr_t addr = vecStart; addr <= GetHighestCodeAddr(); addr+= 2)
{
MemoryType memType = GetMemType(addr);
if (memType != Untyped && /* if system vector loaded */
memType != Const && /* and not defined as constant */
!FindLabel(addr)) /* and no label set in info file */
{
SetMemType(addr, Data); /* that's a data word */
SetCellSize(addr, 2);
/* look whether it points to loaded */
adr_t tgtaddr = GetUWord(addr);
if (GetMemType(tgtaddr) != Untyped)
{ /* if so, */
SetMemType(tgtaddr, Code); /* that's code there */
AddLabel(tgtaddr, Code, /* and it got a predefined label */
sformat("vec_%s", vectbl[(addr - vecStart) / 2]),
true);
}
}
}
}
}
return Disassembler::InitParse(bus);
}
/*****************************************************************************/
/* ParseData : parse data at given memory address for labels */
/*****************************************************************************/
adr_t Dasm650X::ParseData
(
adr_t addr,
int bus /* ignored for 6500 and derivates */
)
{
SetLabelUsed(addr, Const); /* mark DefLabels as used */
int csz = GetCellSize(addr);
if (!IsConst(addr) && !IsBss(addr))
{
if (csz == 2) /* if WORD data */
SetLabelUsed(GetUWord(addr), Code, BusCode, addr);
else if (csz == 1 && useDPLabels) /* or BYTE data and using DP labels */
{
adr_t dp = GetDirectPage(addr, bus);
if (dp != NO_ADDRESS)
SetLabelUsed(dp | GetUByte(addr), Code, BusCode, addr);
}
}
return csz;
}
/*****************************************************************************/
/* FetchInstructionDetails : fetch details about current instruction */
/*****************************************************************************/
// direct copy of 6800 code - maybe not all are necessary
adr_t Dasm650X::FetchInstructionDetails
(
adr_t PC,
uint8_t &instpg,
uint8_t &instb,
uint8_t &mode,
int &mnemoIndex
)
{
instpg = 0; // 650X has no instruction page
instb = GetUByte(PC++);
mnemoIndex = codes[instb].mne;
mode = codes[instb].adrmode;
return PC;
}
/*****************************************************************************/
/* ParseCode : parse instruction at given memory address for labels */
/*****************************************************************************/
adr_t Dasm650X::ParseCode
(
adr_t addr,
int bus /* ignored for 6500 and derivates */
)
{
uint8_t instpg, instb, T, mode;
uint16_t W;
int mnemoIndex;
bool bSetLabel;
adr_t PC = FetchInstructionDetails(addr, instpg, instb, mode, mnemoIndex);
switch (mode) /* which mode is this ? */
{
case _nom: /* no mode */
SetDefLabelUsed(PC, bus);
PC = addr + 1;
break;
case _imp: /* inherent/implied */
case _acc: /* accumulator */
break;
case _imm: /* immediate */
SetDefLabelUsed(PC, bus);
PC++;
break;
case _zpg: /* zero-page */
case _zpx: /* zero-page,X */
case _zpy: /* zero-page,Y */
case _idx: /* (indirect,X) */
case _idy: /* (indirect),Y */
bSetLabel = !IsConst(PC);
if (!bSetLabel)
SetDefLabelUsed(PC, bus);
if (bSetLabel)
{
// this isn't really necessary for 6500, but maybe for derived classes
adr_t dp = GetDirectPage(PC);
if (dp == DEFAULT_ADDRESS || dp == NO_ADDRESS)
dp = GetDirectPage(addr);
if (dp == DEFAULT_ADDRESS)
dp = 0;
if (dp != NO_ADDRESS)
{
T = GetUByte(PC);
W = (uint16_t)dp | T;
W = (uint16_t)PhaseInner(W, PC);
AddRelativeLabel(W, PC, mnemo[mnemoIndex].memType, true, BusCode, addr);
}
}
PC++;
break;
case _ind: /* indirect */
case _abs: /* absolute */
case _abs|_nof: /* absolute, no forced addressing */
case _abx: /* absolute,X */
case _aby: /* absolute,Y */
bSetLabel = !IsConst(PC);
if (!bSetLabel)
SetDefLabelUsed(PC, bus);
SetCellSize(PC, 2);
if (bSetLabel)
{
W = GetUWord(PC);
W = (uint16_t)PhaseInner(W, PC);
AddRelativeLabel(W, PC, mnemo[mnemoIndex].memType, true, BusCode, addr);
}
PC += 2;
break;
case _rel: /* relative byte */
bSetLabel = !IsConst(PC);
// lbl = bSetLabel ? NULL : FindLabel(PC, Const, bus);
T = GetUByte(PC); PC++;
W = (uint16_t)(PC + (signed char)T);
if (bSetLabel)
{
W = (uint16_t)DephaseOuter(W, PC - 1);
AddRelativeLabel(W, PC - 1, mnemo[mnemoIndex].memType, true, BusCode, addr);
}
break;
}
return PC - addr; /* pass back # processed bytes */
}
/*****************************************************************************/
/* DisassembleLabel : disassemble used external labels */
/*****************************************************************************/
bool Dasm650X::DisassembleLabel
(
Label *label,
string &slabel,
string &smnemo,
string &sparm,
int bus
)
{
string lbltxt = label->GetText();
if (lbltxt.find_first_of("+-") == string::npos)
{
adr_t laddr = label->GetAddress();
if (lbltxt.size() && !GetRelative(laddr, bus))
slabel = lbltxt;
else
slabel = Label2String(laddr, 4, true, laddr, bus);
smnemo = mnemo[_equ].mne;
sparm = Address2String(laddr, bus);
Disassembler::DisassembleLabel(label, slabel, smnemo, sparm, bus);
return true;
}
return false;
}
/*****************************************************************************/
/* DisassembleDefLabel : pass back mnemonic and parameters for a DefLabel */
/*****************************************************************************/
bool Dasm650X::DisassembleDefLabel
(
DefLabel *label,
string &slabel,
string &smnemo,
string &sparm,
int bus
)
{
(void)bus;
slabel = label->GetText();
smnemo = mnemo[_equ].mne;
sparm = label->GetDefinition();
Disassembler::DisassembleDefLabel(label, slabel, smnemo, sparm, bus);
return true;
}
/*****************************************************************************/
/* GetDisassemblyFlags : get flags for disassembly of data areas */
/*****************************************************************************/
uint32_t Dasm650X::GetDisassemblyFlags(adr_t addr, int bus)
{
uint32_t flags = Disassembler::GetDisassemblyFlags(addr, bus);
if (flags & SHMF_TXT)
{
if (FindLabel(addr, Const, bus))
flags &= ~SHMF_TXT;
if (useDPLabels)
{
adr_t dp = GetDirectPage(addr, bus);
if (dp != NO_ADDRESS)
{
#if 0
// activate this to match ALL direct page labels
// only makes sense if data DEFINES the label, too
if (!IsConst(addr, bus))
#else
// activate this to only match DEFINED labels
adr_t t = dp | GetUByte(addr);
if (!IsConst(addr, bus) &&
FindLabel(t, Untyped, bus))
#endif
flags &= ~SHMF_TXT;
}
}
}
return flags;
}
/*****************************************************************************/
/* DisassembleData : disassemble data area at given memory address */
/*****************************************************************************/
adr_t Dasm650X::DisassembleData
(
adr_t addr,
adr_t end,
uint32_t flags,
string &smnemo,
string &sparm,
int maxparmlen,
int bus /* ignored for 6500 and derivates */
)
{
adr_t done;
if (flags & SHMF_RMB) /* if reserved memory block */
{
done = end; /* remember it's done completely */
smnemo = mnemo[_rmb].mne;
sparm = Number2String(end - addr, 4, addr);
}
else if (useFCC && (flags & SHMF_TXT)) /* if FCC (text) allowed */
{
smnemo = mnemo[_fcc].mne;
sparm = '"'; /* start the game */
for (done = addr; done < end; done++) /* assemble as many as possible */
{ /* if this would become too long */
if (sparm.size() + 2 > (string::size_type)maxparmlen ||
FindLabel(done, Const, bus)) /* or a DefLabel chimes in */
break; /* terminate the loop */
sparm += *getat(done);
}
sparm += '"'; /* append delimiter */
}
else if (flags & 0xff) /* if not byte-sized */
{
// 680x can ony do byte and word, so assume word entities
smnemo = mnemo[_fdb].mne;
/* assemble as many as possible */
for (done = addr; done < end; done += 2)
{
string s = Label2String(GetUWord(done), 4, !IsConst(done), done);
if (sparm.size()) /* if already something there */
{ /* if this would become too long */
if (sparm.size() + s.size() + 1 > (string::size_type)maxparmlen)
break; /* terminate the loop */
sparm += ','; /* add separator */
}
sparm += s; /* append the byte's representation */
}
}
else /* if FCB (hex or binary) */
{
smnemo = mnemo[_fcb].mne;
/* assemble as many as possible */
for (done = addr; done < end; done++)
{
Label *deflbl = FindLabel(done, Const, bus);
adr_t dp = GetDirectPage(done, bus);
string s;
if (deflbl)
s = deflbl->GetText();
else if (useDPLabels && dp != NO_ADDRESS)
s = Label2String(dp | GetUByte(done), 2, !IsConst(done), done);
else
s = Number2String(*getat(done), 2, done);
if (sparm.size()) /* if already something there */
{ /* if this would become too long */
if (sparm.size() + s.size() + 1 > (string::size_type)maxparmlen)
break; /* terminate the loop */
sparm += ','; /* add separator */
}
sparm += s; /* append the byte's representation */
}
}
return done - addr;
}
/*****************************************************************************/
/* DisassembleCode : disassemble code instruction at given memory address */
/*****************************************************************************/
adr_t Dasm650X::DisassembleCode
(
adr_t addr,
string &smnemo,
string &sparm,
int bus /* ignored for 6500 and derivates */
)
{
uint8_t instpg, instb, T, mode;
uint16_t W;
int mnemoIndex;
adr_t PC = FetchInstructionDetails(addr, instpg, instb, mode, mnemoIndex);
bool bGetLabel;
Label *lbl;
smnemo = mnemo[mnemoIndex].mne;
switch (mode) /* which mode is this? */
{
case _nom: /* no mode */
smnemo = mnemo[_fcb].mne;
lbl = FindLabel(PC, Const, bus);
sparm = lbl ? lbl->GetText() : Number2String(instb, 2, PC);
PC = addr + 1;
break;
case _imp: /* inherent/implied */
// no need to do anything
break;
case _acc: /* accumulator */
if (accparm)
sparm = MnemoCase(regname[_a]);
break;
case _imm: /* immediate byte */
lbl = FindLabel(PC, Const, bus);
T = GetUByte(PC);
sparm = "#" + (lbl ? lbl->GetText() : Number2String(T, 2, PC));
PC++;
break;
case _zpg: /* zero page */
case _zpx: /* zero page,X */
case _zpy: /* zero page,Y */
case _idx: /* (indirect,X) */
case _idy: /* (indirect),Y */
{
bGetLabel = !IsConst(PC);
lbl = bGetLabel ? NULL : FindLabel(PC, Const, bus);
T = GetUByte(PC);
adr_t dp = GetDirectPage(PC);
if (dp == DEFAULT_ADDRESS || dp == NO_ADDRESS)
dp = GetDirectPage(addr);
if (dp == DEFAULT_ADDRESS)
dp = 0;
if (dp != NO_ADDRESS)
{
W = (uint16_t)dp | T;
if (bGetLabel)
W = (uint16_t)PhaseInner(W, PC);
sparm = lbl ? lbl->GetText() : Label2String(W, 4, bGetLabel, PC);
if (GetForcedAddr(PC))
AddForced(smnemo, sparm, false);
}
else // if no direct page, this can't be interpreted as a label
sparm = (lbl ? lbl->GetText() : Number2String(T, 2, PC));
if (mode == _zpx)
sparm += "," + MnemoCase(regname[_x]);
else if (mode == _zpy)
sparm += "," + MnemoCase(regname[_y]);
else if (mode == _idx)
sparm = "(" + sparm + "," + MnemoCase(regname[_x]) + ")";
else if (mode == _idy)
sparm = "(" + sparm + ")," + MnemoCase(regname[_y]);
PC++;
}
break;
case _ind: /* indirect */
case _abs: /* absolute */
case _abs|_nof: /* absolute, no forced addressing */
case _abx: /* absolute,X */
case _aby: /* absolute,Y */
{
bGetLabel = !IsConst(PC);
lbl = bGetLabel ? NULL : FindLabel(PC, Const, bus);
W = GetUWord(PC);
if (bGetLabel)
W = (uint16_t)PhaseInner(W, PC);