/* AppleWin : An Apple //e emulator for Windows Copyright (C) 1994-1996, Michael O'Brien Copyright (C) 1999-2001, Oliver Schmidt Copyright (C) 2002-2005, Tom Charlesworth Copyright (C) 2006-2014, Tom Charlesworth, Michael Pohoreski AppleWin 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. AppleWin 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 AppleWin; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* Description: Debugger Assembler * * Author: Copyright (C) 2006-2010 Michael Pohoreski */ #include "StdAfx.h" #include "Debug.h" #include "../Interface.h" #include "../CPU.h" #include "../Memory.h" #define DEBUG_ASSEMBLER 0 // Globals __________________________________________________________________ // Addressing _____________________________________________________________________________________ AddressingMode_t g_aOpmodes[ NUM_ADDRESSING_MODES ] = { // Output, but eventually used for Input when Assembler is working. {TEXT("") , 1 , "(implied)" }, // (implied) {TEXT("") , 1 , "n/a 1" }, // INVALID1 {TEXT("") , 2 , "n/a 2" }, // INVALID2 {TEXT("") , 3 , "n/a 3" }, // INVALID3 {TEXT("%02X") , 2 , "Immediate" }, // AM_M // #$%02X -> %02X {TEXT("%04X") , 3 , "Absolute" }, // AM_A {TEXT("%02X") , 2 , "Zero Page" }, // AM_Z {TEXT("%04X,X") , 3 , "Absolute,X" }, // AM_AX // %s,X {TEXT("%04X,Y") , 3 , "Absolute,Y" }, // AM_AY // %s,Y {TEXT("%02X,X") , 2 , "Zero Page,X" }, // AM_ZX // %s,X {TEXT("%02X,Y") , 2 , "Zero Page,Y" }, // AM_ZY // %s,Y {TEXT("%s") , 2 , "Relative" }, // AM_R {TEXT("(%02X,X)"), 2 , "(Zero Page),X" }, // AM_IZX // ($%02X,X) -> %s,X {TEXT("(%04X,X)"), 3 , "(Absolute),X" }, // AM_IAX // ($%04X,X) -> %s,X {TEXT("(%02X),Y"), 2 , "(Zero Page),Y" }, // AM_NZY // ($%02X),Y {TEXT("(%02X)") , 2 , "(Zero Page)" }, // AM_NZ // ($%02X) -> $%02X {TEXT("(%04X)") , 3 , "(Absolute)" } // AM_NA // (%04X) -> %s }; // Assembler ______________________________________________________________________________________ int g_bAssemblerOpcodesHashed = false; Hash_t g_aOpcodesHash[ NUM_OPCODES ]; // for faster mnemonic lookup, for the assembler bool g_bAssemblerInput = false; int g_nAssemblerAddress = 0; const Opcodes_t *g_aOpcodes = NULL; // & g_aOpcodes65C02[ 0 ]; // Disassembler Data _____________________________________________________________________________ std::vector g_aDisassemblerData; // Instructions / Opcodes _________________________________________________________________________ // @reference: http://www.6502.org/tutorials/compare_instructions.html // 10 signed: BPL BGE // B0 unsigned: BCS BGE #define R_ MEM_R #define _W MEM_W #define RW MEM_R | MEM_W #define _S MEM_S #define im MEM_IM #define SW MEM_S | MEM_WI #define SR MEM_S | MEM_RI const Opcodes_t g_aOpcodes65C02[ NUM_OPCODES ] = { {"BRK", 0 , SW}, {"ORA", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // 00 .. 03 {"TSB", AM_Z , _W}, {"ORA", AM_Z , R_}, {"ASL", AM_Z , RW}, {"nop", 0 , 0 }, // 04 .. 07 {"PHP", 0 , SW}, {"ORA", AM_M , im}, {"ASL", 0 , 0}, {"nop", 0 , 0 }, // 08 .. 0B {"TSB", AM_A , _W}, {"ORA", AM_A , R_}, {"ASL", AM_A , RW}, {"nop", 0 , 0 }, // 0C .. 0F {"BPL", AM_R , 0}, {"ORA", AM_NZY, R_}, {"ORA", AM_NZ , R_}, {"nop", 0 , 0 }, // 10 .. 13 {"TRB", AM_Z , _W}, {"ORA", AM_ZX , R_}, {"ASL", AM_ZX , RW}, {"nop", 0 , 0 }, // 14 .. 17 {"CLC", 0 , 0}, {"ORA", AM_AY , R_}, {"INC", 0 , 0}, {"nop", 0 , 0 }, // 18 .. 1B {"TRB", AM_A , _W}, {"ORA", AM_AX , R_}, {"ASL", AM_AX , RW}, {"nop", 0 , 0 }, // 1C .. 1F {"JSR", AM_A , SW}, {"AND", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // 20 .. 23 {"BIT", AM_Z , R_}, {"AND", AM_Z , R_}, {"ROL", AM_Z , RW}, {"nop", 0 , 0 }, // 24 .. 27 {"PLP", 0 , SR}, {"AND", AM_M , im}, {"ROL", 0 , 0}, {"nop", 0 , 0 }, // 28 .. 2B {"BIT", AM_A , R_}, {"AND", AM_A , R_}, {"ROL", AM_A , RW}, {"nop", 0 , 0 }, // 2C .. 2F {"BMI", AM_R , 0}, {"AND", AM_NZY, R_}, {"AND", AM_NZ , R_}, {"nop", 0 , 0 }, // 30 .. 33 {"BIT", AM_ZX , R_}, {"AND", AM_ZX , R_}, {"ROL", AM_ZX , RW}, {"nop", 0 , 0 }, // 34 .. 37 {"SEC", 0 , 0}, {"AND", AM_AY , R_}, {"DEC", 0 , 0}, {"nop", 0 , 0 }, // 38 .. 3B {"BIT", AM_AX , R_}, {"AND", AM_AX , R_}, {"ROL", AM_AX , RW}, {"nop", 0 , 0 }, // 3C .. 3F {"RTI", 0 , SR}, {"EOR", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // 40 .. 43 {"nop", AM_Z , 0}, {"EOR", AM_Z , R_}, {"LSR", AM_Z , _W}, {"nop", 0 , 0 }, // 44 .. 47 {"PHA", 0 , SW}, {"EOR", AM_M , im}, {"LSR", 0 , 0}, {"nop", 0 , 0 }, // 48 .. 4B {"JMP", AM_A , 0}, {"EOR", AM_A , R_}, {"LSR", AM_A , _W}, {"nop", 0 , 0 }, // 4C .. 4F {"BVC", AM_R , 0}, {"EOR", AM_NZY, R_}, {"EOR", AM_NZ , R_}, {"nop", 0 , 0 }, // 50 .. 53 {"nop", AM_ZX , 0}, {"EOR", AM_ZX , R_}, {"LSR", AM_ZX , _W}, {"nop", 0 , 0 }, // 54 .. 57 {"CLI", 0 , 0}, {"EOR", AM_AY , R_}, {"PHY", 0 , SW}, {"nop", 0 , 0 }, // 58 .. 5B {"nop", AM_AX , 0}, {"EOR", AM_AX , R_}, {"LSR", AM_AX , RW}, {"nop", 0 , 0 }, // 5C .. 5F {"RTS", 0 , SR}, {"ADC", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // 60 .. 63 {"STZ", AM_Z , _W}, {"ADC", AM_Z , R_}, {"ROR", AM_Z , RW}, {"nop", 0 , 0 }, // 64 .. 67 {"PLA", 0 , SR}, {"ADC", AM_M , im}, {"ROR", 0 , 0}, {"nop", 0 , 0 }, // 68 .. 6B {"JMP", AM_NA , R_}, {"ADC", AM_A , R_}, {"ROR", AM_A , RW}, {"nop", 0 , 0 }, // 6C .. 6F {"BVS", AM_R , 0}, {"ADC", AM_NZY, R_}, {"ADC", AM_NZ , R_}, {"nop", 0 , 0 }, // 70 .. 73 {"STZ", AM_ZX , _W}, {"ADC", AM_ZX , R_}, {"ROR", AM_ZX , RW}, {"nop", 0 , 0 }, // 74 .. 77 {"SEI", 0 , 0}, {"ADC", AM_AY , R_}, {"PLY", 0 , SR}, {"nop", 0 , 0 }, // 78 .. 7B {"JMP", AM_IAX, R_}, {"ADC", AM_AX , R_}, {"ROR", AM_AX , RW}, {"nop", 0 , 0 }, // 7C .. 7F {"BRA", AM_R , 0}, {"STA", AM_IZX, _W}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // 80 .. 83 {"STY", AM_Z , _W}, {"STA", AM_Z , _W}, {"STX", AM_Z , _W}, {"nop", 0 , 0 }, // 84 .. 87 {"DEY", 0 , 0}, {"BIT", AM_M , im}, {"TXA", 0 , 0}, {"nop", 0 , 0 }, // 88 .. 8B {"STY", AM_A , _W}, {"STA", AM_A , _W}, {"STX", AM_A , _W}, {"nop", 0 , 0 }, // 8C .. 8F {"BCC", AM_R , 0}, {"STA", AM_NZY, _W}, {"STA", AM_NZ , _W}, {"nop", 0 , 0 }, // 90 .. 93 {"STY", AM_ZX , _W}, {"STA", AM_ZX , _W}, {"STX", AM_ZY , _W}, {"nop", 0 , 0 }, // 94 .. 97 {"TYA", 0 , 0}, {"STA", AM_AY , _W}, {"TXS", 0 , 0}, {"nop", 0 , 0 }, // 98 .. 9B {"STZ", AM_A , _W}, {"STA", AM_AX , _W}, {"STZ", AM_AX , _W}, {"nop", 0 , 0 }, // 9C .. 9F {"LDY", AM_M , im}, {"LDA", AM_IZX, R_}, {"LDX", AM_M , im}, {"nop", 0 , 0 }, // A0 .. A3 {"LDY", AM_Z , R_}, {"LDA", AM_Z , R_}, {"LDX", AM_Z , R_}, {"nop", 0 , 0 }, // A4 .. A7 {"TAY", 0 , 0}, {"LDA", AM_M , im}, {"TAX", 0 , 0 }, {"nop", 0 , 0 }, // A8 .. AB {"LDY", AM_A , R_}, {"LDA", AM_A , R_}, {"LDX", AM_A , R_}, {"nop", 0 , 0 }, // AC .. AF {"BCS", AM_R , 0}, {"LDA", AM_NZY, R_}, {"LDA", AM_NZ , R_}, {"nop", 0 , 0 }, // B0 .. B3 {"LDY", AM_ZX , R_}, {"LDA", AM_ZX , R_}, {"LDX", AM_ZY , R_}, {"nop", 0 , 0 }, // B4 .. B7 {"CLV", 0 , 0}, {"LDA", AM_AY , R_}, {"TSX", 0 , 0 }, {"nop", 0 , 0 }, // B8 .. BB {"LDY", AM_AX , R_}, {"LDA", AM_AX , R_}, {"LDX", AM_AY , R_}, {"nop", 0 , 0 }, // BC .. BF {"CPY", AM_M , im}, {"CMP", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // C0 .. C3 {"CPY", AM_Z , R_}, {"CMP", AM_Z , R_}, {"DEC", AM_Z , RW}, {"nop", 0 , 0 }, // C4 .. C7 {"INY", 0 , 0}, {"CMP", AM_M , im}, {"DEX", 0 , 0}, {"nop", 0 , 0 }, // C8 .. CB {"CPY", AM_A , R_}, {"CMP", AM_A , R_}, {"DEC", AM_A , RW}, {"nop", 0 , 0 }, // CC .. CF {"BNE", AM_R , 0}, {"CMP", AM_NZY, R_}, {"CMP", AM_NZ , 0}, {"nop", 0 , 0 }, // D0 .. D3 {"nop", AM_ZX , 0}, {"CMP", AM_ZX , R_}, {"DEC", AM_ZX , RW}, {"nop", 0 , 0 }, // D4 .. D7 {"CLD", 0 , 0}, {"CMP", AM_AY , R_}, {"PHX", 0 , SW}, {"nop", 0 , 0 }, // D8 .. DB {"nop", AM_AX , 0}, {"CMP", AM_AX , R_}, {"DEC", AM_AX , RW}, {"nop", 0 , 0 }, // DC .. DF {"CPX", AM_M , im}, {"SBC", AM_IZX, R_}, {"nop", AM_M , im}, {"nop", 0 , 0 }, // E0 .. E3 {"CPX", AM_Z , R_}, {"SBC", AM_Z , R_}, {"INC", AM_Z , RW}, {"nop", 0 , 0 }, // E4 .. E7 {"INX", 0 , 0}, {"SBC", AM_M , R_}, {"NOP", 0 , 0}, {"nop", 0 , 0 }, // E8 .. EB {"CPX", AM_A , R_}, {"SBC", AM_A , R_}, {"INC", AM_A , RW}, {"nop", 0 , 0 }, // EC .. EF {"BEQ", AM_R , 0}, {"SBC", AM_NZY, R_}, {"SBC", AM_NZ , 0}, {"nop", 0 , 0 }, // F0 .. F3 {"nop", AM_ZX , 0}, {"SBC", AM_ZX , R_}, {"INC", AM_ZX , RW}, {"nop", 0 , 0 }, // F4 .. F7 {"SED", 0 , 0}, {"SBC", AM_AY , R_}, {"PLX", 0 , SR}, {"nop", 0 , 0 }, // F8 .. FB {"nop", AM_AX , 0}, {"SBC", AM_AX , R_}, {"INC", AM_AX , RW}, {"nop", 0 , 0 } // FF .. FF }; const Opcodes_t g_aOpcodes6502[ NUM_OPCODES ] = { // Should match Cpu.cpp InternalCpuExecute() switch (*(mem+regs.pc++)) !! /* Based on: http://axis.llx.com/~nparker/a2/opcodes.html If you really want to know what the undocumented --- (n/a) opcodes do, see CPU.cpp x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF 0x BRK ORA (d,X) --- --- tsb z ORA d ASL z --- PHP ORA # ASL A --- tsb a ORA a ASL a --- 1x BPL r ORA (d),Y ora (z) --- trb d ORA d,X ASL z,X --- CLC ORA a,Y ina A --- trb a ORA a,X ASL a,X --- 2x JSR a AND (d,X) --- --- BIT d AND d ROL z --- PLP AND # ROL A --- BIT a AND a ROL a --- 3x BMI r AND (d),Y and (z) --- bit d,X AND d,X ROL z,X --- SEC AND a,Y dea A --- bit a,X AND a,X ROL a,X --- 4x RTI EOR (d,X) --- --- --- EOR d LSR z --- PHA EOR # LSR A --- JMP a EOR a LSR a --- 5x BVC r EOR (d),Y eor (z) --- --- EOR d,X LSR z,X --- CLI EOR a,Y phy --- --- EOR a,X LSR a,X --- 6x RTS ADC (d,X) --- --- stz d ADC d ROR z --- PLA ADC # ROR A --- JMP (a) ADC a ROR a --- 7x BVS r ADC (d),Y adc (z) --- stz d,X ADC d,X ROR z,X --- SEI ADC a,Y ply --- jmp (a,X) ADC a,X ROR a,X --- 8x bra r STA (d,X) --- --- STY d STA d STX z --- DEY bit # TXA --- STY a STA a STX a --- 9x BCC r STA (d),Y sta (z) --- STY d,X STA d,X STX z,Y --- TYA STA a,Y TXS --- Stz a STA a,X stz a,X --- Ax LDY # LDA (d,X) LDX # --- LDY d LDA d LDX z --- TAY LDA # TAX --- LDY a LDA a LDX a --- Bx BCS r LDA (d),Y lda (z) --- LDY d,X LDA d,X LDX z,Y --- CLV LDA a,Y TSX --- LDY a,X LDA a,X LDX a,Y --- Cx CPY # CMP (d,X) --- --- CPY d CMP d DEC z --- INY CMP # DEX --- CPY a CMP a DEC a --- Dx BNE r CMP (d),Y cmp (z) --- --- CMP d,X DEC z,X --- CLD CMP a,Y phx --- --- CMP a,X DEC a,X --- Ex CPX # SBC (d,X) --- --- CPX d SBC d INC z --- INX SBC # NOP --- CPX a SBC a INC a --- Fx BEQ r SBC (d),Y sbc (z) --- --- SBC d,X INC z,X --- SED SBC a,Y plx --- --- SBC a,X INC a,X --- Legend: --- illegal instruction UPPERCASE 6502 lowercase 65C02 80 12, 32, 52, 72, 92, B2, D2, F2 04, 14, 34, 64, 74 89 1A, 3A, 5A, 7A, DA, FA 0C, 1C, 3C, 7C, 9C; # Immediate A Accumulator (implicit for mnemonic) a absolute r Relative d Destination 16-bit Address z Destination Zero Page Address z,x Base=Zero-Page, Offset=X d,x (d,X) (d),Y */ {"BRK", 0 , SW}, {"ORA", AM_IZX, R_}, {"hlt", 0 , 0 }, {"aso", AM_IZX, RW}, // 00 .. 03 {"nop", AM_Z , R_}, {"ORA", AM_Z , R_}, {"ASL", AM_Z , RW}, {"aso", AM_Z , RW}, // 04 .. 07 {"PHP", 0 , SW}, {"ORA", AM_M , im}, {"ASL", 0 , 0}, {"anc", AM_M , im}, // 08 .. 0B {"nop", AM_AX , 0}, {"ORA", AM_A , R_}, {"ASL", AM_A , RW}, {"aso", AM_A , RW}, // 0C .. 0F {"BPL", AM_R , 0}, {"ORA", AM_NZY, R_}, {"hlt", 0 , 0}, {"aso", AM_NZY, RW}, // 10 .. 13 {"nop", AM_ZX , 0}, {"ORA", AM_ZX , R_}, {"ASL", AM_ZX , RW}, {"aso", AM_ZX , RW}, // 14 .. 17 {"CLC", 0 , 0}, {"ORA", AM_AY , R_}, {"nop", 0 , 0}, {"aso", AM_AY , RW}, // 18 .. 1B {"nop", AM_AX , 0}, {"ORA", AM_AX , R_}, {"ASL", AM_AX , RW}, {"aso", AM_AX , RW}, // 1C .. 1F {"JSR", AM_A , SW}, {"AND", AM_IZX, R_}, {"hlt", 0 , 0}, {"rla", AM_IZX, RW}, // 20 .. 23 {"BIT", AM_Z , R_}, {"AND", AM_Z , R_}, {"ROL", AM_Z , RW}, {"rla", AM_Z , RW}, // 24 .. 27 {"PLP", 0 , SR}, {"AND", AM_M , im}, {"ROL", 0 , 0}, {"anc", AM_M , im}, // 28 .. 2B {"BIT", AM_A , R_}, {"AND", AM_A , R_}, {"ROL", AM_A , RW}, {"rla", AM_A , RW}, // 2C .. 2F {"BMI", AM_R , 0}, {"AND", AM_NZY, R_}, {"hlt", 0 , 0}, {"rla", AM_NZY, RW}, // 30 .. 33 {"nop", AM_ZX , 0}, {"AND", AM_ZX , R_}, {"ROL", AM_ZX , RW}, {"rla", AM_ZX , RW}, // 34 .. 37 {"SEC", 0 , 0}, {"AND", AM_AY , R_}, {"nop", 0 , 0}, {"rla", AM_AY , RW}, // 38 .. 3B {"nop", AM_AX , 0}, {"AND", AM_AX , R_}, {"ROL", AM_AX , RW}, {"rla", AM_AX , RW}, // 3C .. 3F {"RTI", 0 , SR}, {"EOR", AM_IZX, R_}, {"hlt", 0 , 0}, {"lse", AM_IZX, RW}, // 40 .. 43 {"nop", AM_Z , 0}, {"EOR", AM_Z , R_}, {"LSR", AM_Z , RW}, {"lse", AM_Z , RW}, // 44 .. 47 {"PHA", 0 , SW}, {"EOR", AM_M , im}, {"LSR", 0 , 0}, {"alr", AM_M , im}, // 48 .. 4B {"JMP", AM_A , 0}, {"EOR", AM_A , R_}, {"LSR", AM_A , RW}, {"lse", AM_A , RW}, // 4C .. 4F {"BVC", AM_R , 0}, {"EOR", AM_NZY, R_}, {"hlt", 0 , 0}, {"lse", AM_NZY, RW}, // 50 .. 53 {"nop", AM_ZX , 0}, {"EOR", AM_ZX , R_}, {"LSR", AM_ZX , RW}, {"lse", AM_ZX , RW}, // 54 .. 57 {"CLI", 0 , 0}, {"EOR", AM_AY , R_}, {"nop", 0 , 0}, {"lse", AM_AY , RW}, // 58 .. 5B {"nop", AM_AX , 0}, {"EOR", AM_AX , R_}, {"LSR", AM_AX , RW}, {"lse", AM_AX , RW}, // 5C .. 5F {"RTS", 0 , SR}, {"ADC", AM_IZX, R_}, {"hlt", 0 , 0}, {"rra", AM_IZX, RW}, // 60 .. 63 {"nop", AM_Z , 0}, {"ADC", AM_Z , R_}, {"ROR", AM_Z , RW}, {"rra", AM_Z , RW}, // 64 .. 67 {"PLA", 0 , SR}, {"ADC", AM_M , im}, {"ROR", 0 , 0}, {"arr", AM_M , im}, // 68 .. 6B {"JMP", AM_NA , R_}, {"ADC", AM_A , R_}, {"ROR", AM_A , RW}, {"rra", AM_A , RW}, // 6C .. 6F {"BVS", AM_R , 0}, {"ADC", AM_NZY, R_}, {"hlt", 0 , 0}, {"rra", AM_NZY, RW}, // 70 .. 73 {"nop", AM_ZX , 0}, {"ADC", AM_ZX , R_}, {"ROR", AM_ZX , RW}, {"rra", AM_ZX , RW}, // 74 .. 77 {"SEI", 0 , 0}, {"ADC", AM_AY , R_}, {"nop", 0 , 0}, {"rra", AM_AY , RW}, // 78 .. 7B {"nop", AM_AX , 0}, {"ADC", AM_AX , R_}, {"ROR", AM_AX , RW}, {"rra", AM_AX , RW}, // 7C .. 7F {"nop", AM_M , im}, {"STA", AM_IZX, _W}, {"nop", AM_M , im}, {"axs", AM_IZX, _W}, // 80 .. 83 {"STY", AM_Z , _W}, {"STA", AM_Z , _W}, {"STX", AM_Z , _W}, {"axs", AM_Z , _W}, // 84 .. 87 {"DEY", 0 , 0}, {"nop", AM_M , im}, {"TXA", 0 , 0}, {"xaa", AM_M , im}, // 88 .. 8B {"STY", AM_A , _W}, {"STA", AM_A , _W}, {"STX", AM_A , _W}, {"axs", AM_A , _W}, // 8C .. 8F {"BCC", AM_R , 0}, {"STA", AM_NZY, _W}, {"hlt", 0 , 0}, {"axa", AM_NZY, _W}, // 90 .. 93 {"STY", AM_ZX , _W}, {"STA", AM_ZX , _W}, {"STX", AM_ZY , _W}, {"axs", AM_ZY , _W}, // 94 .. 97 {"TYA", 0 , 0}, {"STA", AM_AY , _W}, {"TXS", 0 , 0}, {"tas", AM_AY , _W}, // 98 .. 9B {"say", AM_AX , _W}, {"STA", AM_AX , _W}, {"xas", AM_AX , _W}, {"axa", AM_AY , _W}, // 9C .. 9F {"LDY", AM_M , im}, {"LDA", AM_IZX, R_}, {"LDX", AM_M , im}, {"lax", AM_IZX, R_}, // A0 .. A3 {"LDY", AM_Z , R_}, {"LDA", AM_Z , R_}, {"LDX", AM_Z , R_}, {"lax", AM_Z , R_}, // A4 .. A7 {"TAY", 0 , 0}, {"LDA", AM_M , im}, {"TAX", 0 , 0 }, {"oal", AM_M , im}, // A8 .. AB {"LDY", AM_A , R_}, {"LDA", AM_A , R_}, {"LDX", AM_A , R_}, {"lax", AM_A , R_}, // AC .. AF {"BCS", AM_R , 0}, {"LDA", AM_NZY, R_}, {"hlt", 0 , 0 }, {"lax", AM_NZY, R_}, // B0 .. B3 {"LDY", AM_ZX , R_}, {"LDA", AM_ZX , R_}, {"LDX", AM_ZY , R_}, {"lax", AM_ZY , 0 }, // B4 .. B7 {"CLV", 0 , 0}, {"LDA", AM_AY , R_}, {"TSX", 0 , 0 }, {"las", AM_AY , R_}, // B8 .. BB {"LDY", AM_AX , R_}, {"LDA", AM_AX , R_}, {"LDX", AM_AY , R_}, {"lax", AM_AY , R_}, // BC .. BF {"CPY", AM_M , im}, {"CMP", AM_IZX, R_}, {"nop", AM_M , im}, {"dcm", AM_IZX, RW}, // C0 .. C3 {"CPY", AM_Z , R_}, {"CMP", AM_Z , R_}, {"DEC", AM_Z , RW}, {"dcm", AM_Z , RW}, // C4 .. C7 {"INY", 0 , 0}, {"CMP", AM_M , im}, {"DEX", 0 , 0}, {"sax", AM_M , im}, // C8 .. CB {"CPY", AM_A , R_}, {"CMP", AM_A , R_}, {"DEC", AM_A , RW}, {"dcm", AM_A , RW}, // CC .. CF {"BNE", AM_R , 0}, {"CMP", AM_NZY, R_}, {"hlt", 0 , 0}, {"dcm", AM_NZY, RW}, // D0 .. D3 {"nop", AM_ZX , 0}, {"CMP", AM_ZX , R_}, {"DEC", AM_ZX , RW}, {"dcm", AM_ZX , RW}, // D4 .. D7 {"CLD", 0 , 0}, {"CMP", AM_AY , R_}, {"nop", 0 , 0}, {"dcm", AM_AY , RW}, // D8 .. DB {"nop", AM_AX , 0}, {"CMP", AM_AX , R_}, {"DEC", AM_AX , RW}, {"dcm", AM_AX , RW}, // DC .. DF {"CPX", AM_M , im}, {"SBC", AM_IZX, R_}, {"nop", AM_M , im}, {"ins", AM_IZX, RW}, // E0 .. E3 {"CPX", AM_Z , R_}, {"SBC", AM_Z , R_}, {"INC", AM_Z , RW}, {"ins", AM_Z , RW}, // E4 .. E7 {"INX", 0 , 0}, {"SBC", AM_M , im}, {"NOP", 0 , 0}, {"sbc", AM_M , im}, // E8 .. EB {"CPX", AM_A , R_}, {"SBC", AM_A , R_}, {"INC", AM_A , RW}, {"ins", AM_A , RW}, // EC .. EF {"BEQ", AM_R , 0}, {"SBC", AM_NZY, R_}, {"hlt", 0 , 0}, {"ins", AM_NZY, RW}, // F0 .. F3 {"nop", AM_ZX , 0}, {"SBC", AM_ZX , R_}, {"INC", AM_ZX , RW}, {"ins", AM_ZX , RW}, // F4 .. F7 {"SED", 0 , 0}, {"SBC", AM_AY , R_}, {"nop", 0 , 0}, {"ins", AM_AY , RW}, // F8 .. FB {"nop", AM_AX , 0}, {"SBC", AM_AX , R_}, {"INC", AM_AX , RW}, {"ins", AM_AX , RW} // FF .. FF }; #undef R_ #undef _W #undef RW #undef _S #undef im #undef SW #undef SR // @reference: http://www.textfiles.com/apple/DOCUMENTATION/merlin.docs1 // Private __________________________________________________________________ // NOTE: Keep in sync AsmDirectives_e g_aAssemblerDirectives ! AssemblerDirective_t g_aAssemblerDirectives[ NUM_ASM_DIRECTIVES ] = { // NULL n/a {""}, // Origin, Target Address, EndProg, Equate, Data, AsciiString,HexString // Acme {"???"}, // Big Mac {"???"}, // DOS Tool Kit {"???"}, // Lisa {"???"}, // Merlin {"ASC"}, // ASC "postive" 'negative' {"DDB"}, // Define Double Byte (Define WORD) {"DFB"}, // DeFine Byte {"DS" }, // Define Storage {"HEX"}, // HEX ###### or HEX ##,##,... {"ORG"}, // Origin // MicroSparc {"???"}, // ORCA/M {"???"}, // SC ... {".OR"}, // ORigin {".TA"}, // Target Address {".EN"}, // ENd of program {".EQ"}, // EQuate {".DA"}, // DAta {".AS"}, // Ascii String {".HS"}, // Hex String // Ted II {"???"}, // Weller {"???"}, // User-Defined // NOTE: Keep in sync AsmCustomDirective_e g_aAssemblerDirectives ! {"db" }, // ASM_DEFINE_BYTE {"dw" }, // ASM_DEFINE_WORD {"da" }, // ASM_DEFINE_ADDRESS_16 // d memory Dump // da Memory Ascii, Define Address // ds S = Ascii (Low), // dt T = Apple (High) // dm M = Mixed (Low,High=EndofString) {"ds" }, // ASM_DEFINE_ASCII_TEXT {"dt" }, // ASM_DEFINE_APPLE_TEXT {"dm" }, // ASM_DEFINE_TEXT_HI_LO {"df" }, // ASM_DEFINE_FLOAT {"dfx"}, // ASM_DEFINE_FLOAT_X }; int g_iAssemblerSyntax = ASM_CUSTOM; // Which assembler syntax to use int g_aAssemblerFirstDirective[ NUM_ASSEMBLERS ] = { FIRST_A_DIRECTIVE, FIRST_B_DIRECTIVE, FIRST_D_DIRECTIVE, FIRST_L_DIRECTIVE, FIRST_M_DIRECTIVE, FIRST_u_DIRECTIVE, FIRST_O_DIRECTIVE, FIRST_S_DIRECTIVE, FIRST_T_DIRECTIVE, FIRST_W_DIRECTIVE, FIRST_Z_DIRECTIVE }; // Assemblers enum AssemblerFlags_e { AF_HaveLabel = (1 << 0), AF_HaveComma = (1 << 1), AF_HaveHash = (1 << 2), AF_HaveImmediate = (1 << 3), AF_HaveDollar = (1 << 4), AF_HaveLeftParen = (1 << 5), AF_HaveRightParen = (1 << 6), AF_HaveEitherParen= (1 << 7), AF_HaveBothParen = (1 << 8), AF_HaveRegisterX = (1 << 9), AF_HaveRegisterY = (1 <<10), AF_HaveZeroPage = (1 <<11), AF_HaveTarget = (1 <<12), }; enum AssemblerState_e { AS_GET_MNEMONIC , AS_GET_MNEMONIC_PARM , AS_GET_HASH , AS_GET_TARGET , AS_GET_PAREN , AS_GET_INDEX , AS_DONE }; int m_bAsmFlags; std::vector m_vAsmOpcodes; int m_iAsmAddressMode = AM_IMPLIED; struct DelayedTarget_t { char m_sAddress[ MAX_SYMBOLS_LEN + 1 ]; WORD m_nBaseAddress; // mem address to store symbol at int m_nOpcode ; int m_iOpmode ; // AddressingMode_e }; std::vector m_vDelayedTargets; bool m_bDelayedTargetsDirty = false; int m_nAsmBytes = 0; WORD m_nAsmBaseAddress = 0; WORD m_nAsmTargetAddress = 0; WORD m_nAsmTargetValue = 0; // Private void AssemblerHashOpcodes (); void AssemblerHashDirectives (); // Implementation ___________________________________________________________ //=========================================================================== bool _6502_CalcRelativeOffset( int nOpcode, int nBaseAddress, int nTargetAddress, WORD * pTargetOffset_ ) { if (_6502_IsOpcodeBranch( nOpcode)) { // Branch is // a) relative to address+2 // b) in 2's compliment // // i.e. // 300: D0 7F -> BNE $381 0x381 - 0x300 = 0x81 +129 // 300: D0 80 -> BNE $282 0x282 - 0x300 = -126 // // 300: D0 7E BNE $380 // ^ ^ ^ ^ // | | | TargetAddress // | | TargetOffset // | Opcode // BaseAddress int nDistance = nTargetAddress - nBaseAddress; if (pTargetOffset_) *pTargetOffset_ = (BYTE)(nDistance - 2); if ((nDistance - 2) > _6502_BRANCH_POS) m_iAsmAddressMode = NUM_OPMODES; // signal bad if ((nDistance - 2) < _6502_BRANCH_NEG) m_iAsmAddressMode = NUM_OPMODES; // signal bad return true; } return false; } //=========================================================================== int _6502_GetOpmodeOpbyte ( const int nBaseAddress, int & iOpmode_, int & nOpbyte_, const DisasmData_t** pData_ ) { #if _DEBUG if (! g_aOpcodes) { GetFrame().FrameMessageBox("Debugger not properly initialized", "ERROR", MB_OK ); g_aOpcodes = & g_aOpcodes65C02[ 0 ]; // Enhanced Apple //e g_aOpmodes[ AM_2 ].m_nBytes = 2; g_aOpmodes[ AM_3 ].m_nBytes = 3; } #endif int iOpcode_ = *(mem + nBaseAddress); iOpmode_ = g_aOpcodes[ iOpcode_ ].nAddressMode; nOpbyte_ = g_aOpmodes[ iOpmode_ ].m_nBytes; // 2.6.2.25 Fixed: DB DW custom data byte sizes weren't scrolling properly in the disasm view. // Changed _6502_GetOpmodeOpbyte() to be aware of data bytes. // // NOTE: _6502_GetOpmodeOpbyte() needs to (effectively) call Disassembly_GetData() // a) the CmdCursorLineUp() calls us to calc for -X bytes back up how to reach the cursor (address) line below // b) The disassembler view needs to know how many bytes each line is. int nSlack; // 2.7.0.0 TODO: FIXME: Opcode length that over-lap data, should be shortened ... if (nOpbyte_ > 1) if Disassembly_IsDataAddress( nBaseAddress + 1 ) nOpbyte_ = 1; DisasmData_t* pData = Disassembly_IsDataAddress( nBaseAddress ); if ( pData ) { if ( pData_ ) *pData_ = pData; const DWORD nEndAddress = pData->nEndAddress; const int nDisplayLen = nEndAddress - nBaseAddress + 1; // *inclusive* KEEP IN SYNC: _CmdDefineByteRange() CmdDisasmDataList() _6502_GetOpmodeOpbyte() FormatNopcodeBytes() nSlack = nDisplayLen; // Data Disassembler // Smart Disassembly - Data Section // Assemblyer Directives - Psuedo Mnemonics switch ( pData->eElementType ) { case NOP_BYTE_1: nOpbyte_ = 1; iOpmode_ = AM_M; break; case NOP_BYTE_2: nOpbyte_ = 2; iOpmode_ = AM_M; break; case NOP_BYTE_4: nOpbyte_ = 4; iOpmode_ = AM_M; break; case NOP_BYTE_8: nOpbyte_ = 8; iOpmode_ = AM_M; break; case NOP_FAC : nOpbyte_ = 5; iOpmode_ = AM_M; break; case NOP_WORD_1: nOpbyte_ = 2; iOpmode_ = AM_M; break; case NOP_WORD_2: nOpbyte_ = 4; iOpmode_ = AM_M; break; case NOP_WORD_4: nOpbyte_ = 8; iOpmode_ = AM_M; break; case NOP_ADDRESS:nOpbyte_ = 2; iOpmode_ = AM_A; // BUGFIX: 2.6.2.33 Define Address should be shown as Absolute mode, not Indirect Absolute mode. DA BASIC.FPTR D000:D080 // was showing as "da (END-1)" now shows as "da END-1" pData->nTargetAddress = *(LPWORD)(mem+nBaseAddress); break; case NOP_STRING_APPLE: iOpmode_ = AM_DATA; nOpbyte_ = nSlack; break; case NOP_STRING_APPLESOFT: // TODO: FIXME: scan memory for high byte nOpbyte_ = 8; iOpmode_ = AM_DATA; break; default: #if _DEBUG // not implemented! int *fatal = 0; *fatal = 0xDEADC0DE; #endif break; } /* // REMOVED in v1.25 ... because of AppleSoft Basic: DW NEXT1 801 DW LINE1 803 // Check if we are not element aligned ... nSlack = (nOpbyte_ > 1) ? (nBaseAddress & nOpbyte_-1 ) : 0; if (nSlack) { nOpbyte_ = nSlack; iOpmode_ = AM_M; } */ //iOpcode_ = NUM_OPCODES; // Don't have valid opcodes ... we have data ! // iOpcode_ = (int)( pData ); // HACK: pass pData back to caller ... iOpcode_ = OPCODE_NOP; } #if _DEBUG if (iOpcode_ >= NUM_OPCODES) { bool bStop = true; } #endif return iOpcode_; } //=========================================================================== void _6502_GetOpcodeOpmodeOpbyte ( int & iOpcode_, int & iOpmode_, int & nOpbyte_ ) { iOpcode_ = _6502_GetOpmodeOpbyte( regs.pc, iOpmode_, nOpbyte_ ); } //=========================================================================== bool _6502_GetStackReturnAddress ( WORD & nAddress_ ) { unsigned nStack = regs.sp; nStack++; if (nStack <= (_6502_STACK_END - 1)) { nAddress_ = (unsigned)*(LPBYTE)(mem + nStack); nStack++; nAddress_ += ((unsigned)*(LPBYTE)(mem + nStack)) << 8; nAddress_++; return true; } return false; } //=========================================================================== bool _6502_GetTargets ( WORD nAddress, int *pTargetPartial_, int *pTargetPartial2_, int *pTargetPointer_, int * pTargetBytes_, bool bIgnoreBranch /*= true*/, bool bIncludeNextOpcodeAddress /*= true*/ ) { if (! pTargetPartial_) return false; if (! pTargetPartial2_) return false; if (! pTargetPointer_) return false; // if (! pTargetBytes_) // return false; *pTargetPartial_ = NO_6502_TARGET; *pTargetPartial2_ = NO_6502_TARGET; *pTargetPointer_ = NO_6502_TARGET; if (pTargetBytes_) *pTargetBytes_ = 0; BYTE nOpcode = mem[nAddress]; BYTE nTarget8 = mem[(nAddress+1)&0xFFFF]; WORD nTarget16 = (mem[(nAddress+2)&0xFFFF]<<8) | nTarget8; int eMode = g_aOpcodes[ nOpcode ].nAddressMode; // We really need to use the values that are code and data assembler // TODO: FIXME: _6502_GetOpmodeOpbyte( iAddress, iOpmode, nOpbytes ); switch (eMode) { case AM_IMPLIED: if (g_aOpcodes[ nOpcode ].nMemoryAccess & MEM_S) // Stack R/W? { if (nOpcode == OPCODE_RTI || nOpcode == OPCODE_RTS) // RTI or RTS? { WORD sp = regs.sp; if (nOpcode == OPCODE_RTI) { //*pTargetPartial3_ = _6502_STACK_BEGIN + ((sp+1) & 0xFF); // TODO: PLP ++sp; } *pTargetPartial_ = _6502_STACK_BEGIN + ((sp+1) & 0xFF); *pTargetPartial2_ = _6502_STACK_BEGIN + ((sp+2) & 0xFF); nTarget16 = mem[*pTargetPartial_] + (mem[*pTargetPartial2_]<<8); if (nOpcode == OPCODE_RTS) ++nTarget16; } else if (nOpcode == OPCODE_BRK) // BRK? { *pTargetPartial_ = _6502_STACK_BEGIN + ((regs.sp+0) & 0xFF); *pTargetPartial2_ = _6502_STACK_BEGIN + ((regs.sp-1) & 0xFF); //*pTargetPartial3_ = _6502_STACK_BEGIN + ((regs.sp-2) & 0xFF); // TODO: PHP //*pTargetPartial4_ = _6502_BRK_VECTOR + 0; // TODO //*pTargetPartial5_ = _6502_BRK_VECTOR + 1; // TODO nTarget16 = *(LPWORD)(mem + _6502_BRK_VECTOR); } else // PHn/PLn { if (g_aOpcodes[ nOpcode ].nMemoryAccess & MEM_WI) nTarget16 = _6502_STACK_BEGIN + ((regs.sp+0) & 0xFF); else nTarget16 = _6502_STACK_BEGIN + ((regs.sp+1) & 0xFF); } if (bIncludeNextOpcodeAddress || (nOpcode != OPCODE_RTI && nOpcode != OPCODE_RTS && nOpcode != OPCODE_BRK)) *pTargetPointer_ = nTarget16; if (pTargetBytes_) *pTargetBytes_ = 1; } break; case AM_A: // Absolute if (nOpcode == OPCODE_JSR) { *pTargetPartial_ = _6502_STACK_BEGIN + ((regs.sp+0) & 0xFF); *pTargetPartial2_ = _6502_STACK_BEGIN + ((regs.sp-1) & 0xFF); } if (bIncludeNextOpcodeAddress || (nOpcode != OPCODE_JSR && nOpcode != OPCODE_JMP_A)) *pTargetPointer_ = nTarget16; if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_IAX: // Indexed (Absolute) Indirect - ie. JMP (abs,x) _ASSERT(nOpcode == OPCODE_JMP_IAX); nTarget16 += regs.x; *pTargetPartial_ = nTarget16; *pTargetPartial2_ = nTarget16+1; if (bIncludeNextOpcodeAddress) *pTargetPointer_ = *(LPWORD)(mem + nTarget16); if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_AX: // Absolute, X nTarget16 += regs.x; *pTargetPointer_ = nTarget16; if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_AY: // Absolute, Y nTarget16 += regs.y; *pTargetPointer_ = nTarget16; if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_NA: // Indirect (Absolute) - ie. JMP (abs) _ASSERT(nOpcode == OPCODE_JMP_NA); *pTargetPartial_ = nTarget16; *pTargetPartial2_ = (nTarget16+1) & _6502_MEM_END; if (GetMainCpu() == CPU_6502 && (nTarget16 & 0xff) == 0xff) *pTargetPartial2_ = nTarget16 & 0xff00; if (bIncludeNextOpcodeAddress) *pTargetPointer_ = mem[*pTargetPartial_] | (mem[*pTargetPartial2_] << 8); if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_IZX: // Indexed (Zeropage Indirect, X) nTarget8 = (nTarget8 + regs.x) & 0xFF; *pTargetPartial_ = nTarget8; *pTargetPointer_ = *(LPWORD)(mem + nTarget8); if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_NZY: // Indirect (Zeropage) Indexed, Y *pTargetPartial_ = nTarget8; *pTargetPointer_ = ((*(LPWORD)(mem + nTarget8)) + regs.y) & _6502_MEM_END; // Bugfix: if (pTargetBytes_) *pTargetBytes_ = 1; break; case AM_NZ: // Indirect (Zeropage) *pTargetPartial_ = nTarget8; *pTargetPointer_ = *(LPWORD)(mem + nTarget8); if (pTargetBytes_) *pTargetBytes_ = 2; break; case AM_R: if (!bIgnoreBranch) { *pTargetPartial_ = nTarget8; *pTargetPointer_ = nAddress + 2; if (nTarget8 <= _6502_BRANCH_POS) *pTargetPointer_ += nTarget8; // + else *pTargetPointer_ -= nTarget8; // - *pTargetPointer_ &= _6502_MEM_END; if (pTargetBytes_) *pTargetBytes_ = 1; } break; case AM_Z: // Zeropage *pTargetPointer_ = nTarget8; if (pTargetBytes_) *pTargetBytes_ = 1; break; case AM_ZX: // Zeropage, X *pTargetPointer_ = (nTarget8 + regs.x) & 0xFF; // .21 Bugfix: shouldn't this wrap around? Yes. if (pTargetBytes_) *pTargetBytes_ = 1; break; case AM_ZY: // Zeropage, Y *pTargetPointer_ = (nTarget8 + regs.y) & 0xFF; // .21 Bugfix: shouldn't this wrap around? Yes. if (pTargetBytes_) *pTargetBytes_ = 1; break; default: if (pTargetBytes_) *pTargetBytes_ = 0; break; } return true; } //=========================================================================== bool _6502_GetTargetAddress ( const WORD & nAddress, WORD & nTarget_ ) { int iOpcode; int iOpmode; int nOpbytes; iOpcode = _6502_GetOpmodeOpbyte( nAddress, iOpmode, nOpbytes ); // Composite string that has the target nAddress if ((iOpmode != AM_IMPLIED) && (iOpmode != AM_1) && (iOpmode != AM_2) && (iOpmode != AM_3)) { int nTargetPartial; int nTargetPartial2; int nTargetPointer; int nTargetBytes; _6502_GetTargets( nAddress, &nTargetPartial, &nTargetPartial2, &nTargetPointer, &nTargetBytes, false ); // if (nTargetPointer == NO_6502_TARGET) // { // if (_6502_IsOpcodeBranch( nOpcode ) // { // return true; // } // } if (nTargetPointer != NO_6502_TARGET) // else { nTarget_ = nTargetPointer & _6502_MEM_END; return true; } } return false; } //=========================================================================== bool _6502_IsOpcodeBranch ( int iOpcode ) { // 76543210 Bit // xxx10000 Branch if (iOpcode == OPCODE_BRA) return true; if ((iOpcode & 0x1F) != 0x10) // low nibble not zero? return false; if ((iOpcode >> 4) & 1) return true; // (nOpcode == 0x10) || // BPL // (nOpcode == 0x30) || // BMI // (nOpcode == 0x50) || // BVC // (nOpcode == 0x70) || // BVS // (nOpcode == 0x90) || // BCC // (nOpcode == 0xB0) || // BCS // (nOpcode == 0xD0) || // BNE // (nOpcode == 0xF0) || // BEQ return false; } //=========================================================================== bool _6502_IsOpcodeValid ( int iOpcode ) { if ((iOpcode & 0x3) == 0x3) return false; if (islower( g_aOpcodes6502[ iOpcode ].sMnemonic[ 0 ] )) return false; return true; } // Assembler ________________________________________________________________ //=========================================================================== Hash_t AssemblerHashMnemonic ( const TCHAR * pMnemonic ) { const TCHAR *pText = pMnemonic; Hash_t nMnemonicHash = 0; int iHighBits; const int NUM_LOW_BITS = 19; // 24 -> 19 prime const int NUM_MSK_BITS = 5; // 4 -> 5 prime const Hash_t BIT_MSK_HIGH = ((1 << NUM_MSK_BITS) - 1) << NUM_LOW_BITS; #if DEBUG_ASSEMBLER int nLen = strlen( pMnemonic ); static int nMaxLen = 0; if (nMaxLen < nLen) { nMaxLen = nLen; ConsolePrintFormat( "New Max Len: %d %s", nMaxLen, pMnemonic ); } #endif while ( *pText ) // for ( int iChar = 0; iChar < 4; iChar++ ) { char c = tolower( *pText ); // TODO: based on ALLOW_INPUT_LOWERCASE ?? nMnemonicHash = (nMnemonicHash << NUM_MSK_BITS) + c; iHighBits = (nMnemonicHash & BIT_MSK_HIGH); if (iHighBits) { nMnemonicHash = (nMnemonicHash ^ (iHighBits >> NUM_LOW_BITS)) & ~ BIT_MSK_HIGH; } pText++; } return nMnemonicHash; } //=========================================================================== void AssemblerHashOpcodes () { Hash_t nMnemonicHash; int iOpcode; for ( iOpcode = 0; iOpcode < NUM_OPCODES; iOpcode++ ) { const TCHAR *pMnemonic = g_aOpcodes65C02[ iOpcode ].sMnemonic; nMnemonicHash = AssemblerHashMnemonic( pMnemonic ); g_aOpcodesHash[ iOpcode ] = nMnemonicHash; #if DEBUG_ASSEMBLER //OutputDebugString( "" ); ConsolePrintFormat( "%s : %08X ", pMnemonic, nMnemonicHash ); // CLC: 002B864 #endif } ConsoleUpdate(); } //=========================================================================== void AssemblerHashDirectives () { Hash_t nMnemonicHash; int iOpcode; for ( iOpcode = 0; iOpcode < NUM_ASM_M_DIRECTIVES; iOpcode++ ) { int iNopcode = FIRST_M_DIRECTIVE + iOpcode; //. const TCHAR *pMnemonic = g_aAssemblerDirectivesMerlin[ iOpcode ].m_pMnemonic; const TCHAR *pMnemonic = g_aAssemblerDirectives[ iNopcode ].m_pMnemonic; nMnemonicHash = AssemblerHashMnemonic( pMnemonic ); g_aAssemblerDirectives[ iNopcode ].m_nHash = nMnemonicHash; } } //=========================================================================== void AssemblerStartup() { AssemblerHashOpcodes(); AssemblerHashDirectives(); } //=========================================================================== void _CmdAssembleHashDump () { // #if DEBUG_ASM_HASH std::vector vHashes; HashOpcode_t tHash; int iOpcode; for ( iOpcode = 0; iOpcode < NUM_OPCODES; iOpcode++ ) { tHash.m_iOpcode = iOpcode; tHash.m_nValue = g_aOpcodesHash[ iOpcode ]; vHashes.push_back( tHash ); } std::sort( vHashes.begin(), vHashes.end(), HashOpcode_t() ); // Hash_t nPrevHash = vHashes.at( 0 ).m_nValue; Hash_t nThisHash = 0; for ( iOpcode = 0; iOpcode < NUM_OPCODES; iOpcode++ ) { tHash = vHashes.at( iOpcode ); Hash_t iThisHash = tHash.m_nValue; int nOpcode = tHash.m_iOpcode; int nOpmode = g_aOpcodes[ nOpcode ].nAddressMode; ConsoleBufferPushFormat( "%08X %02X %s %s" , iThisHash , nOpcode , g_aOpcodes65C02[ nOpcode ].sMnemonic , g_aOpmodes[ nOpmode ].m_sName ); nThisHash++; // if (nPrevHash != iThisHash) // { // ConsoleBufferPushFormat( "Total: %d", nThisHash ); // nThisHash = 0; // } } ConsoleUpdate(); //#endif } //=========================================================================== int AssemblerPokeAddress( const int Opcode, const int nOpmode, const WORD nBaseAddress, const WORD nTargetOffset ) { // int nOpmode = g_aOpcodes[ nOpcode ].nAddressMode; int nOpbytes = g_aOpmodes[ nOpmode ].m_nBytes; // if (nOpbytes != nBytes) // ConsoleDisplayError( " ERROR: Input Opcode bytes differs from actual!" ); *(memdirty + (nBaseAddress >> 8)) |= 1; // *(mem + nBaseAddress) = (BYTE) nOpcode; if (nOpbytes > 1) *(mem + nBaseAddress + 1) = (BYTE)(nTargetOffset >> 0); if (nOpbytes > 2) *(mem + nBaseAddress + 2) = (BYTE)(nTargetOffset >> 8); return nOpbytes; } //=========================================================================== bool AssemblerPokeOpcodeAddress( const WORD nBaseAddress ) { int iAddressMode = m_iAsmAddressMode; // opmode detected from input int nTargetValue = m_nAsmTargetValue; int iOpcode; int nOpcodes = m_vAsmOpcodes.size(); for ( iOpcode = 0; iOpcode < nOpcodes; iOpcode++ ) { int nOpcode = m_vAsmOpcodes.at( iOpcode ); // m_iOpcode; int nOpmode = g_aOpcodes[ nOpcode ].nAddressMode; if (nOpmode == iAddressMode) { *(mem + nBaseAddress) = (BYTE) nOpcode; int nOpbytes = AssemblerPokeAddress( nOpcode, nOpmode, nBaseAddress, nTargetValue ); if (m_bDelayedTargetsDirty) { int nDelayedTargets = m_vDelayedTargets.size(); DelayedTarget_t *pTarget = & m_vDelayedTargets.at( nDelayedTargets - 1 ); pTarget->m_nOpcode = nOpcode; pTarget->m_iOpmode = nOpmode; } g_nAssemblerAddress += nOpbytes; return true; } } return false; } //=========================================================================== bool TestFlag( AssemblerFlags_e eFlag ) { if (m_bAsmFlags & eFlag) return true; return false; } //=========================================================================== void SetFlag( AssemblerFlags_e eFlag, bool bValue = true ) { if (bValue) m_bAsmFlags |= eFlag; else m_bAsmFlags &= ~ eFlag; } /* Output AM_IMPLIED AM_M AM_A AM_Z AM_I // indexed or indirect */ //=========================================================================== bool AssemblerGetArgs( int iArg, int nArgs, WORD nBaseAddress ) { m_iAsmAddressMode = AM_IMPLIED; AssemblerState_e eNextState = AS_GET_MNEMONIC; m_bAsmFlags = 0; m_nAsmTargetAddress = 0; int nBase = 10; // Sync up to Raw Args for matching mnemonic // Process them instead of the cooked args, since we need the orginal tokens Arg_t *pArg = &g_aArgRaw[ iArg ]; while (iArg < g_nArgRaw) { int iToken = pArg->eToken; // int iType = pArg->bType; if (iToken == TOKEN_HASH) { if (eNextState != AS_GET_MNEMONIC_PARM) { ConsoleBufferPush( TEXT( " Syntax Error: '#'" ) ); return false; } if (TestFlag( AF_HaveHash )) { ConsoleBufferPush( TEXT( " Syntax Error: Extra '#'" ) ); // No thanks, we already have one return false; } SetFlag( AF_HaveHash ); m_iAsmAddressMode = AM_M; // Immediate eNextState = AS_GET_TARGET; m_nAsmBytes = 1; } else if (iToken == TOKEN_DOLLAR) { if (TestFlag( AF_HaveDollar )) { ConsoleBufferPush( TEXT( " Syntax Error: Extra '$'" ) ); // No thanks, we already have one return false; } nBase = 16; // switch to hex if (! TestFlag( AF_HaveHash)) { SetFlag( AF_HaveDollar ); m_iAsmAddressMode = AM_A; // Absolute } eNextState = AS_GET_TARGET; m_nAsmBytes = 2; } else if (iToken == TOKEN_PAREN_L) { if (TestFlag( AF_HaveLeftParen )) { ConsoleBufferPush( TEXT( " Syntax Error: Extra '('" ) ); // No thanks, we already have one return false; } SetFlag( AF_HaveLeftParen ); // Indexed or Indirect m_iAsmAddressMode = AM_I; } else if (iToken == TOKEN_PAREN_R) { if (TestFlag( AF_HaveRightParen )) { ConsoleBufferPush( TEXT( " Syntax Error: Extra ')'" ) ); // No thanks, we already have one return false; } SetFlag( AF_HaveRightParen ); // Indexed or Indirect m_iAsmAddressMode = AM_I; } else if (iToken == TOKEN_COMMA) { if (TestFlag( AF_HaveComma )) { ConsoleBufferPush( TEXT( " Syntax Error: Extra ','" ) ); // No thanks, we already have one return false; } SetFlag( AF_HaveComma ); eNextState = AS_GET_INDEX; // We should have address by now } else if (iToken == TOKEN_LESS_THAN) { } else if (iToken == TOKEN_GREATER_THAN) { } else if (iToken == TOKEN_SEMI) // comment { break; } else if (iToken == TOKEN_ALPHANUMERIC) { if (eNextState == AS_GET_MNEMONIC) { eNextState = AS_GET_MNEMONIC_PARM; } else if (eNextState == AS_GET_MNEMONIC_PARM) { eNextState = AS_GET_TARGET; } if (eNextState == AS_GET_TARGET) { SetFlag( AF_HaveTarget ); ArgsGetValue( pArg, & m_nAsmTargetAddress, nBase ); // Do Symbol Lookup WORD nSymbolAddress; bool bExists = FindAddressFromSymbol( pArg->sArg, &nSymbolAddress ); if (bExists) { m_nAsmTargetAddress = nSymbolAddress; if (m_iAsmAddressMode == AM_IMPLIED) m_iAsmAddressMode = AM_A; } else { // if valid hex address, don't have delayed target std::string strAddress = StrFormat( "%X", m_nAsmTargetAddress); if (strAddress != pArg->sArg) { DelayedTarget_t tDelayedTarget; tDelayedTarget.m_nBaseAddress = nBaseAddress; strncpy( tDelayedTarget.m_sAddress, pArg->sArg, MAX_SYMBOLS_LEN ); tDelayedTarget.m_sAddress[ MAX_SYMBOLS_LEN ] = 0; // Flag this target that we need to update it when we have the relevent info m_bDelayedTargetsDirty = true; tDelayedTarget.m_nOpcode = 0; tDelayedTarget.m_iOpmode = m_iAsmAddressMode; m_vDelayedTargets.push_back( tDelayedTarget ); m_nAsmTargetAddress = 0; } } if ((m_iAsmAddressMode != AM_M) && (m_iAsmAddressMode != AM_IMPLIED) && (! m_bDelayedTargetsDirty)) { if (m_nAsmTargetAddress <= _6502_ZEROPAGE_END) { m_iAsmAddressMode = AM_Z; m_nAsmBytes = 1; } } } if (eNextState == AS_GET_INDEX) { if (pArg->nArgLen == 1) { if (pArg->sArg[0] == 'X') { if (! TestFlag( AF_HaveComma )) { ConsoleBufferPush( TEXT( " Syntax Error: Missing ','" ) ); return false; } SetFlag( AF_HaveRegisterX ); } if (pArg->sArg[0] == 'Y') { if (! (TestFlag( AF_HaveComma ))) { ConsoleBufferPush( TEXT( " Syntax Error: Missing ','" ) ); return false; } SetFlag( AF_HaveRegisterY ); } } } } iArg++; pArg++; } return true; } //=========================================================================== bool AssemblerUpdateAddressingMode() { SetFlag( AF_HaveEitherParen, TestFlag(AF_HaveLeftParen) || TestFlag(AF_HaveRightParen) ); SetFlag( AF_HaveBothParen, TestFlag(AF_HaveLeftParen) && TestFlag(AF_HaveRightParen) ); if ((TestFlag( AF_HaveLeftParen )) && (! TestFlag( AF_HaveRightParen ))) { ConsoleBufferPush( TEXT( " Syntax Error: Missing ')'" ) ); return false; } if ((! TestFlag( AF_HaveLeftParen )) && ( TestFlag( AF_HaveRightParen ))) { ConsoleBufferPush( TEXT( " Syntax Error: Missing '('" ) ); return false; } if (TestFlag( AF_HaveComma )) { if ((! TestFlag( AF_HaveRegisterX )) && (! TestFlag( AF_HaveRegisterY ))) { ConsoleBufferPush( TEXT( " Syntax Error: Index 'X' or 'Y'" ) ); return false; } } if (TestFlag( AF_HaveBothParen )) { if (TestFlag( AF_HaveComma )) { if (TestFlag( AF_HaveRegisterX )) { m_iAsmAddressMode = AM_AX; m_nAsmBytes = 2; if (m_nAsmTargetAddress <= _6502_ZEROPAGE_END) { m_iAsmAddressMode = AM_ZX; m_nAsmBytes = 1; } } if (TestFlag( AF_HaveRegisterY )) { m_iAsmAddressMode = AM_AY; m_nAsmBytes = 2; if (m_nAsmTargetAddress <= _6502_ZEROPAGE_END) { m_iAsmAddressMode = AM_ZY; m_nAsmBytes = 1; } } } } if ((m_iAsmAddressMode == AM_A) || (m_iAsmAddressMode == AM_Z)) { if (! TestFlag( AF_HaveEitherParen)) // if no paren { if (TestFlag( AF_HaveComma ) && TestFlag( AF_HaveRegisterX )) { if (m_iAsmAddressMode == AM_Z) m_iAsmAddressMode = AM_ZX; else m_iAsmAddressMode = AM_AX; } if (TestFlag( AF_HaveComma ) && TestFlag( AF_HaveRegisterY )) { if (m_iAsmAddressMode == AM_Z) m_iAsmAddressMode = AM_ZY; else m_iAsmAddressMode = AM_AY; } } } if (m_iAsmAddressMode == AM_I) { if (! TestFlag( AF_HaveEitherParen)) // if no paren { // Indirect Zero Page // Indirect Absolute } } m_nAsmTargetValue = m_nAsmTargetAddress; int nOpcode = m_vAsmOpcodes.at( 0 ); // branch opcodes don't vary (only 1 Addressing Mode) if (_6502_CalcRelativeOffset( nOpcode, m_nAsmBaseAddress, m_nAsmTargetAddress, & m_nAsmTargetValue )) { if (m_iAsmAddressMode == NUM_OPMODES) return false; m_iAsmAddressMode = AM_R; } return true; } //=========================================================================== int AssemblerDelayedTargetsSize() { int nSize = m_vDelayedTargets.size(); return nSize; } // The Assembler was terminated, with Symbol(s) declared, but not (yet) defined. // i.e. // A 300 // BNE $DONE // //=========================================================================== void AssemblerProcessDelayedSymols() { m_bDelayedTargetsDirty = false; // assembler set signal if new symbol was added bool bModified = false; while (! bModified) { bModified = false; std::vector::iterator iSymbol; for ( iSymbol = m_vDelayedTargets.begin(); iSymbol != m_vDelayedTargets.end(); ++iSymbol ) { DelayedTarget_t *pTarget = & (*iSymbol); // m_vDelayedTargets.at( iSymbol ); WORD nTargetAddress; bool bExists = FindAddressFromSymbol( pTarget->m_sAddress, & nTargetAddress ); if (bExists) { // TODO: need to handle #symbol, symbol+n, symbol-n bModified = true; int nOpcode = pTarget->m_nOpcode; int nOpmode = g_aOpcodes[ nOpcode ].nAddressMode; // int nOpbytes = g_aOpmodes[ nOpmode ].m_nBytes; // 300: D0 7E BNE $380 // ^ ^ ^ // | | TargetAddress // | TargetValue // BaseAddress WORD nTargetValue = nTargetAddress; if (_6502_CalcRelativeOffset( nOpcode, pTarget->m_nBaseAddress, nTargetAddress, & nTargetValue )) { if (m_iAsmAddressMode == NUM_OPMODES) { nTargetValue = 0; bModified = false; } } if (bModified) { AssemblerPokeAddress( nOpcode, nOpmode, pTarget->m_nBaseAddress, nTargetValue ); *(memdirty + (pTarget->m_nBaseAddress >> 8)) |= 1; m_vDelayedTargets.erase( iSymbol ); // iterators are invalid after the point of deletion // need to restart enumeration break; } } } if (! bModified) break; } } bool Assemble( int iArg, int nArgs, WORD nAddress ) { bool bGotArgs; bool bGotMode; bool bGotByte; // Since, making 2-passes is not an option, // we need to buffer the target address fix-ups. AssemblerProcessDelayedSymols(); m_nAsmBaseAddress = nAddress; TCHAR *pMnemonic = g_aArgs[ iArg ].sArg; Hash_t nMnemonicHash = AssemblerHashMnemonic( pMnemonic ); #if DEBUG_ASSEMBLER ConsolePrintFormat( "%s%04X%s: %s%s%s -> %s%08X", CHC_ADDRESS, nAddress, CHC_DEFAULT, CHC_STRING, pMnemonic, CHC_DEFAULT, CHC_NUM_HEX, nMnemonicHash ); #endif m_vAsmOpcodes.clear(); // Candiate opcodes int iOpcode; // Ugh! Linear search. for ( iOpcode = 0; iOpcode < NUM_OPCODES; iOpcode++ ) { if (nMnemonicHash == g_aOpcodesHash[ iOpcode ]) { m_vAsmOpcodes.push_back( iOpcode ); } } int nOpcodes = m_vAsmOpcodes.size(); if (! nOpcodes) { // Check for assembler directive ConsoleBufferPush( TEXT(" Syntax Error: Invalid mnemonic") ); return false; } else { bGotArgs = AssemblerGetArgs( iArg, nArgs, nAddress ); if (bGotArgs) { bGotMode = AssemblerUpdateAddressingMode(); if (bGotMode) { bGotByte = AssemblerPokeOpcodeAddress( nAddress ); } } } return true; } //=========================================================================== void AssemblerOn () { g_bAssemblerInput = true; g_sConsolePrompt[0] = g_aConsolePrompt[ PROMPT_ASSEMBLER ]; } //=========================================================================== void AssemblerOff () { g_bAssemblerInput = false; g_sConsolePrompt[0] = g_aConsolePrompt[ PROMPT_COMMAND ]; }